add name

Sudoku/SudokuEvent.mch

 MACHINE SudokuEvent
 /* A version of Sudoku where the solving happens inside an event
- (c) Michael Leuschel
+ (c) 2021 Michael Leuschel
+ VisB Visualisation by Matteo Röhle and Michael Leuschel
 */
 DEFINITIONS
  Sze == 3; Mx==(Sze*Sze);