Well, the idea was not to change any piece types, but detect whether the generated move was for an imitator imitating a pawn, and in that case forbid the move (by returning a non-zero value) when it advanced more than one rank. This was not so easy, though, because BadZone did not get the coordinates of the origin square passed to it, and it was not obvious what the imitator was imitating.
I did change the Diagram script now to make this easier: the variable 'imi' now contains the imitated piece at all times during the game, not just when the AI is thinking. And the square of origin are passed as extra parameters to BadZone. (Refresh the browser cache!) This should make the following script so what you want:
Well, the idea was not to change any piece types, but detect whether the generated move was for an imitator imitating a pawn, and in that case forbid the move (by returning a non-zero value) when it advanced more than one rank. This was not so easy, though, because BadZone did not get the coordinates of the origin square passed to it, and it was not obvious what the imitator was imitating.
I did change the Diagram script now to make this easier: the variable 'imi' now contains the imitated piece at all times during the game, not just when the AI is thinking. And the square of origin are passed as extra parameters to BadZone. (Refresh the browser cache!) This should make the following script so what you want:
<script> function BadZone(toFile, toRank, pieceType, color, fromFile, fromRank) { if(pieceType != NUMBER_OF_JOKER) return 0; if(imi != NUMBER_OF_PAWN) return 0; return (fromRank != (color ? toRank + 1 : toRank - 1)); } </script>(Replace the NUMBER_OF_... by the actual numbers your pieces have in your table.)