From d11cb81efc675c2744a5a9e6635a25b20a456af2 Mon Sep 17 00:00:00 2001
From: Michael Leuschel <leuschel@cs.uni-duesseldorf.de>
Date: Wed, 9 Oct 2019 15:23:14 +0200
Subject: [PATCH] add version of N-Queens with visualization

---
 notebooks/models/NQueens_Puzzle.ipynb         | 1094 +++++++++++++++++
 .../images/ChessPieces/Chess_emptyd45.gif     |  Bin 0 -> 878 bytes
 .../images/ChessPieces/Chess_emptyl45.gif     |  Bin 0 -> 878 bytes
 .../models/images/ChessPieces/Chess_qld45.gif |  Bin 0 -> 1508 bytes
 .../models/images/ChessPieces/Chess_qll45.gif |  Bin 0 -> 1492 bytes
 5 files changed, 1094 insertions(+)
 create mode 100644 notebooks/models/NQueens_Puzzle.ipynb
 create mode 100644 notebooks/models/images/ChessPieces/Chess_emptyd45.gif
 create mode 100644 notebooks/models/images/ChessPieces/Chess_emptyl45.gif
 create mode 100644 notebooks/models/images/ChessPieces/Chess_qld45.gif
 create mode 100644 notebooks/models/images/ChessPieces/Chess_qll45.gif

diff --git a/notebooks/models/NQueens_Puzzle.ipynb b/notebooks/models/NQueens_Puzzle.ipynb
new file mode 100644
index 0000000..7ffe1c8
--- /dev/null
+++ b/notebooks/models/NQueens_Puzzle.ipynb
@@ -0,0 +1,1094 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## N-Queens Puzzle\n",
+    "\n",
+    "The N-Queens is a famous constraint solving benchmark puzzle.\n",
+    "It is a generalisation of the original eight queens puzzle, where the goal is to place eight queens on a 8*8 chessboard so that no two queens attach each other.\n",
+    "\n",
+    "We now write a B machine with constants\n",
+    "* n: the size of the chess board\n",
+    "* queens: a partial function from 1..n to 1..n, stating in which row the queen on any given column is placed\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Loaded machine: Queens"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "::load\n",
+    "MACHINE Queens\n",
+    "CONSTANTS n, queens\n",
+    "PROPERTIES\n",
+    " n>0 & n<120 &\n",
+    " queens : (1..n) +-> (1..n)\n",
+    " \n",
+    "DEFINITIONS\n",
+    "      ANIMATION_FUNCTION_DEFAULT == ( {r,c,i|r:1..n & c:1..n & i=(r+c) mod 2 }  );\n",
+    "      ANIMATION_FUNCTION == ( {r,c,i|c:1..n & c|->r:queens & i=2+((r+c) mod 2) }  );\n",
+    "\n",
+    "      ANIMATION_IMG0 == \"images/ChessPieces/Chess_emptyl45.gif\";\n",
+    "      ANIMATION_IMG1 == \"images/ChessPieces/Chess_emptyd45.gif\";\n",
+    "      ANIMATION_IMG2 == \"images/ChessPieces/Chess_qll45.gif\";\n",
+    "      ANIMATION_IMG3 == \"images/ChessPieces/Chess_qld45.gif\";\n",
+    "      \n",
+    "      no_attack(q1,q2,board) == no_attack_pos(q1,board(q1),q2,board(q2));\n",
+    "      no_attack_pos(q1,q1row,q2,q2row) == (q1row+q2-q1 /= q2row & q1row-q2+q1 /= q2row);\n",
+    "      Solution(board) == (\n",
+    "         board :  perm(1..n) /* for each column the row in which the queen is in */\n",
+    "         &\n",
+    "         !(q1,q2).(q1:1..n & q2:2..n & q2>q1 => no_attack(q1,q2,board) )\n",
+    "        )\n",
+    "END"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Machine constants set up using operation 0: $setup_constants()"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":constants"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Machine initialised using operation 1: $initialise_machine()"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":init"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "In the PROPERTIES we have not stated any constraint of our puzzle. Hence the default solution is n=1 and an empty board:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "$\\renewcommand{\\emptyset}{\\mathord\\varnothing}(\\emptyset\\mapsto 1)$"
+      ],
+      "text/plain": [
+       "(∅↦1)"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "(queens,n)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Let us now slowly tighten the constraints. We can use the ```:find``` command to find\n",
+    "states which satisfy the PROPERTIES and some additional predicate.\n",
+    "Let us first require that every queen is really placed.\n",
+    "We also impose an 8 by 8 board."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Found a matching state and made it current state"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":find queens : 1..8 --> 1..8"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "$\\{(1\\mapsto 1),(2\\mapsto 1),(3\\mapsto 1),(4\\mapsto 1),(5\\mapsto 1),(6\\mapsto 1),(7\\mapsto 1),(8\\mapsto 1)\\}$"
+      ],
+      "text/plain": [
+       "{(1↦1),(2↦1),(3↦1),(4↦1),(5↦1),(6↦1),(7↦1),(8↦1)}"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "queens"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "We can use the graphical visualization ANIMATION_FUNCTION to display the solution:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "<table style=\"font-family:monospace\"><tbody>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "</tbody></table>"
+      ],
+      "text/plain": [
+       "<Animation function visualisation>"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":show"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "We now also require that queens is a bijection, i.e., that no two queens are placed on the same row:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Found a matching state and made it current state"
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":find queens : 1..8 >-> 1..8"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "<table style=\"font-family:monospace\"><tbody>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "</tr>\n",
+       "</tbody></table>"
+      ],
+      "text/plain": [
+       "<Animation function visualisation>"
+      ]
+     },
+     "execution_count": 9,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":show"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Finally, let us solve the puzzle by also respecting the diagonals.\n",
+    "We use the predefined Solutions DEFINITION in the model above."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Found a matching state and made it current state"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":find n=8 & Solution(queens)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "<table style=\"font-family:monospace\"><tbody>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "</tbody></table>"
+      ],
+      "text/plain": [
+       "<Animation function visualisation>"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":show"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "$\\{(1\\mapsto 1),(2\\mapsto 5),(3\\mapsto 8),(4\\mapsto 6),(5\\mapsto 3),(6\\mapsto 7),(7\\mapsto 2),(8\\mapsto 4)\\}$"
+      ],
+      "text/plain": [
+       "{(1↦1),(2↦5),(3↦8),(4↦6),(5↦3),(6↦7),(7↦2),(8↦4)}"
+      ]
+     },
+     "execution_count": 12,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "queens"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Obviously we can solve the puzzle for other values of n:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Found a matching state and made it current state"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":find n=20 & Solution(queens)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "<table style=\"font-family:monospace\"><tbody>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"2\" src=\"images/ChessPieces/Chess_qll45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "</tr>\n",
+       "<tr>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"3\" src=\"images/ChessPieces/Chess_qld45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"1\" src=\"images/ChessPieces/Chess_emptyd45.gif\"/></td>\n",
+       "<td style=\"padding:0px\"><img alt=\"0\" src=\"images/ChessPieces/Chess_emptyl45.gif\"/></td>\n",
+       "</tr>\n",
+       "</tbody></table>"
+      ],
+      "text/plain": [
+       "<Animation function visualisation>"
+      ]
+     },
+     "execution_count": 14,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    ":show"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "ProB 2",
+   "language": "prob",
+   "name": "prob2"
+  },
+  "language_info": {
+   "codemirror_mode": "prob2_jupyter_repl",
+   "file_extension": ".prob",
+   "mimetype": "text/x-prob2-jupyter-repl",
+   "name": "prob"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/notebooks/models/images/ChessPieces/Chess_emptyd45.gif b/notebooks/models/images/ChessPieces/Chess_emptyd45.gif
new file mode 100644
index 0000000000000000000000000000000000000000..fc51105a88b05dccfa99c13b758484d3fb6d10b5
GIT binary patch
literal 878
zcmZ?wbhEHb)Me0R_|9PX|NsAMJx-%&Gz3Ok2yA}T!@$6x_>+Z^f#Dy64g&)N11L{0
zaCkE?bI5pXSa7hJLs%>3#D;~3+Xa-p=6GyebhKN-IP1=djf;=>D>!$_cy3y9a<WG7
ks+g0TmY$w&kbG*6=jLT+XIm7%x^r^#^7HdKnVA@@0p}mi#Q*>R

literal 0
HcmV?d00001

diff --git a/notebooks/models/images/ChessPieces/Chess_emptyl45.gif b/notebooks/models/images/ChessPieces/Chess_emptyl45.gif
new file mode 100644
index 0000000000000000000000000000000000000000..3e169e90e4f3e4d49b97aa71bb25a3ba898e197a
GIT binary patch
literal 878
zcmZ?wbhEHb)Me0R_|9PX|NsC0=jM!}(GVDEA#kEei-Cbb@h1x-1H(TC9R>yl22h@0
z;P7T(=8*B&u;5@bhp<-6i46-6w+kqH&GFc{=xDcuan_v^8y6q%S8(o<@!YiJ<YbND
lRWT<wEj>NmAo<iB&&|uu&bBCib?4;f<>%*fGBYt)0|48vkk|kK

literal 0
HcmV?d00001

diff --git a/notebooks/models/images/ChessPieces/Chess_qld45.gif b/notebooks/models/images/ChessPieces/Chess_qld45.gif
new file mode 100644
index 0000000000000000000000000000000000000000..83f1bfebdad694c9309eeaa760e1f74ccf6e89a9
GIT binary patch
literal 1508
zcmZ?wbhEHb)Me0R_|9PX9~FE@0`FnqITE;s1g;^29;a(Cbgst<idvk`!O$^e(BgCq
zjP}AowbNcO+KLRSEw@5YvE^1US_=oomTO^XDKf~mTna^oOS3^}4jg0~&Vit0!#Q9y
z1sNn8PJy8wWDsT814WuWQ6SU;2SJ)GU{s9^f;6jPs2CY|DHelKHXL{<W<!vZVm1sV
zBLgSJWH5?C29}CZP$Us$2}MD0U?~v<MqbFkP{Iq0oREQ~r4s~cN;pB0fRiQ^St0{X
z0ZRx{6tDy%LpV?rFa#q_I8ap7L?8i8MKF>O(1aomO$jJcL;(_tieMzcp$I_&9ExBh
z0S5vc5?~~N0yqQ&z=(rG0ERdafPsSpj2IX=z=#0}gwF6~U|>-E$->CM@Q*<UBm>G5
z3>^O%3^`;xHY_;U%pt55b7I57!|ejfUUPO#a2Dhfk-fAau;9%8{$wMqCkd|?>-I=k
z{Bd6Dbj^N>#GDqcr!FdN_W!5p{Cw`7FtJ{XVa1Pdmj#pS9~=-A&GZ&yVAzzy8KRlp
z={;rP0b5q_R||b+F&7p+JXE~kcz*(0+TB}MU!0l6)~^;jYtxhclUWr1HoJUyzN4_@
zsg`b3fiA;37JDJN9k1@MYI1*>WYDu?!?nY?taiW6S1LRxWPMnp;$ivu!2DwI<PF@x
zOM_-en0edwmV7v<v`|ENi}a-z_GbSdB>kw|{{DEtDqg=|-+9u46E_<^_{siIUT*9E
zMSM>-?EHLavn{LHf7RR053~{)T5SD(=J%I1TKxYScH{A5`@Yqwst<GuWRw|t8q{P<
z-(O6KuN2*CelEwC@dh8eRv{xpq(txIE7jY2HXrxqwLN^oPtnxkiiA6>=@eo2mkd)w
z<a7_7Fy@=f&Y<;w%LN67lQ)cFnHb)*AJ>}hdi9Xk%eBV^{1`&EpXyDqZN3+L;qSMQ
zkX}ayhe+Pa6xGO^wp;Jp|F=DQ!adCC>%^9;XSWB`YAw6|bjp8^A0m-{2Y)W%`>$|f
zf>#cM!J)RBoQtQ_wp>#?<39Jr1crhQx*;#zJvo)V)#n-{X)fKwVU@8^AotiYA>}DQ
zudG-yZPpVGZwB_q&T=O+U#;FS>EO~d=bbBOFtBL7SkUa3{B_mjby^Mwl;<t8bh)(n
zgj#mcV!o^F=Y+IcxEeRuR8_v-qP${5OHh?pi^`e@aguVbJC~mFST^gH_{t?cHNX5f
z3S3Q}Z!pzp({Z_+C)Mwlw%=->?{czXamJ4IY6}iq+;c6tBE-^u`=q^aYH04^^^?>m
z>ONRuV0d(~+J@jLK|%JHOTImty?$S{!KF@}*+m+HynY8Bx@&AR_#AHCy6v;L@wS#n
Y>@t3TvM*n75zqZ{(L>!g(1F1k04thppa1{>

literal 0
HcmV?d00001

diff --git a/notebooks/models/images/ChessPieces/Chess_qll45.gif b/notebooks/models/images/ChessPieces/Chess_qll45.gif
new file mode 100644
index 0000000000000000000000000000000000000000..53d83b61605ea846bb8629cdacf4a5b71b87cbf6
GIT binary patch
literal 1492
zcmZ?wbhEHb)Me0R_|9PX9~qpR^B;`9!@;>Z-y!JOobOOH<@+%ZdJhN3ro4xsy;I(U
z(Q`Q1+w&ZZ?!m#<o_kQ#a&IdLU4w(QE!V*492_idIR{16=ayC<gM+2j#~^4<^)V<a
zJ~ju0_QJuO;=K?wrFbtGZH0p=#ap2$d+QVsS_=m~*=xaQDIByUF9oAHa8R8*2aKk`
zL3Pv=2r7=60!BS>P#o0*LD@k)VAKK!*+DH3l<d_4M%8eT>{Sg$#c&YiR18MhFpvxf
zL6*s26a@!fmQi371P4xrL15$s2bP9jP^9T)2|`YAV5#W@L57-6U}OmghKiODq^W2L
zMurHWX=n&Wnwo}Cq-dxKMv4-KV5A8Lii(<0B%!GYLW*!8A)yFG0*VqKB!K_|5)xn}
zARqxo0tmn%AOJ=j90Fj(fdC8~9AL!2zyU@KNI(a~2IU0?j{gjt95Nmo794Em5Y~!0
zv0>rib^&FtIXesv^Ky&G?kWfjIK96=%1H0Z*TCxz-2d}LcYf_x5b~Qdp+lwM#r+wE
z|M@ugd|c1bp#49O!{w8H%#L~^<8_x<84hd?WeU6}b+|}jd4ccY!m1xe&koEgdh$f(
zh2WCVH4Iz$-ptyf5V+WbecdmPsR_O|diHgH47a?vxGjBip6m_n3`f8JZ0rAC?^}Oh
zbrY|X-|86$V!T<m|Ggcy;oSaR{TEl2MwjRx+^Oq7?U==eThI3_l@<R}_;r5H>9pTM
zUD_YmW1IGEy=N9NdGnp1^Hsb@KIb2@-?K2kQEh>xz~N0+tn0K|Co41hou9+^|J;ZE
z0L=@g|65~TIIaKw_M9~5ooSp7YLCyj&Jn-yZ}Iom{|-WZMboAx$=k3@P-kaIN_B9s
zV0-88p#RWel9cn+lqO+mR;GZKDwm&M6op)384uLu+?e8N%GX%_$X+$)`jy}_rmP2w
zS1c%v<NPo2!zY#NDoX=L=gAWf?Dw{qD|@z>l*%P3-I;N>^uNo_=zd?z@BX#Esh<L;
z=>OZSF!8nFm3f^EB54WJlWu8To27s6l1RXR!;pFHVr|8zjon{9T^@hFX39xX;Wuo7
z^XsI(p3z-8WzxyTz3(`$&wuFfL`pIFh(TlToU&UlSqytNN*fEzytr)nie*(xBn1`I
zlvcRL>?}O$n|QTq@*3BSU%^Sj6TduPf8bZ<B^MJB(_^BB9Sh#DoH4U*+@y5G;B}x$
zipr8ztNNx+R5cTvbaGyelxm*Ed7W9D%l;?01=h>YoXx2+K|o1=Pyf4@>6{{l!hV9Y
zlU~1MabR3I(f40cG*`D!?A82(E4oxeTvoR%);>I+DfF4M&C8|B7r#Gdt*<iSUQ>oO
ypVt>g(HxmWC$+BT2=m$09}+%ic6H66lZrV3fuDSAzQ6f=-ho}W#Ep@W!5RQH5S|tQ

literal 0
HcmV?d00001

-- 
GitLab