Make test for valid promotion piece color-dependent

This is needed to make it work in variants where white and black have
different armies; quite likely white will promote to pieces that do not
exist in the black army, so we really have to make sure we test if the
white (upper-case) piece exists in this case.

diff --git a/moves.c b/moves.c
index d667113..830e0bb 100644 (file)
--- a/moves.c
+++ b/moves.c
@@ -1085,7 +1085,8 @@ if(appData.debugMode)fprintf(debugFP,"SHOGI promoChar = %c\n", promoChar ? promo
     if (promoChar != NULLCHAR) {
        if(promoChar == '=') cl.kind = IllegalMove; else // [HGM] shogi: no deferred promotion outside Shogi
        if (cl.kind == WhitePromotion || cl.kind == BlackPromotion) {
-           if(CharToPiece(promoChar) == EmptySquare) cl.kind = ImpossibleMove; // non-existing piece
+           if(CharToPiece(flags & F_WHITE_ON_MOVE ? ToUpper(promoChar) : ToLower(promoChar)) == EmptySquare)
+                cl.kind = ImpossibleMove; // non-existing piece
        } else {
            cl.kind = IllegalMove;
        }
@@ -1291,7 +1292,7 @@ void Disambiguate(board, flags, closure)
     } else if (c != NULLCHAR) closure->kind = IllegalMove;
 
     closure->promoChar = ToLower(c); // this can be NULLCHAR! Note we keep original promoChar even if illegal.
-    if(c != '+' && c != '=' && c != NULLCHAR && CharToPiece(c) == EmptySquare)
+    if(c != '+' && c != '=' && c != NULLCHAR && CharToPiece(flags & F_WHITE_ON_MOVE ? ToUpper(c) : ToLower(c)) == EmptySquare)
        closure->kind = ImpossibleMove; // but we cannot handle non-existing piece types!
     if (closure->count > 1) {
        closure->kind = AmbiguousMove;