diff --git a/N-Queens/queens_20_tla.json b/N-Queens/queens_20_tla.json
index b254fab9efe5c457778355956c88328d7dc676a5..9804da75363581d62c1361deb5b75e2c3bac6990 100644
--- a/N-Queens/queens_20_tla.json
+++ b/N-Queens/queens_20_tla.json
@@ -11,8 +11,11 @@
 "events": [
     {
       "for":{"from":1,"to":"20"}, 
-      "id":"gTiles%0",
-      "event":"Solve"
+      "for":{"from":1,"to":"20"}, 
+      "id":"tile%0x%1",
+      "event":"Solve",
+      "predicates": [ "queens(%0)=%1"],
+      "hovers": [{ "attr":"opacity", "enter":"0.5", "leave":"1.0"}]
     }
   ]
 }