Fix forgetting 'choice' command after promotion

The promotion restriction specified by a 'choice' command is now reset
at the start of every new move, so that future promotion moves won't
use it too. In addition,the 'choice' command is ignored when legality
testing is on.

diff --git a/backend.c b/backend.c
index 79d04fb..6b206ea 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -7645,7 +7645,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
       if(gameMode == AnalyzeMode && (pausing || controlKey) && first.excludeMoves) { // use pause state to exclude moves
        doubleClick = TRUE; gatingPiece = boards[currentMove][y][x];
       }
-      fromX = x; fromY = y; toX = toY = killX = killY = kill2X = kill2Y = -1;
+      fromX = x; fromY = y; toX = toY = killX = killY = kill2X = kill2Y = -1; *promoRestrict = NULLCHAR;
       if(!appData.oneClick || !OnlyMove(&x, &y, FALSE) ||
         // even if only move, we treat as normal when this would trigger a promotion popup, to allow sweep selection
         appData.sweepSelect && CanPromote(boards[currentMove][fromY][fromX], fromY) && originalY != y) {
@@ -7697,7 +7697,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
             !(fromP == BlackKing && toP == BlackRook && frc)))) {
            /* Clicked again on same color piece -- changed his mind */
            second = (x == fromX && y == fromY);
-           killX = killY = kill2X = kill2Y = -1;
+           killX = killY = kill2X = kill2Y = -1; *promoRestrict = NULLCHAR;
            if(second && gameMode == AnalyzeMode && SubtractTimeMarks(&lastClickTime, &prevClickTime) < 200) {
                second = FALSE; // first double-click rather than scond click
                doubleClick = first.excludeMoves; // used by UserMoveEvent to recognize exclude moves
@@ -9183,7 +9183,7 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
       }
       return;
     }
-    if(sscanf(message, "choice %s", promoRestrict) == 1) {
+    if(!appData.testLegality && sscanf(message, "choice %s", promoRestrict) == 1) {
       if(deferChoice) {
         LeftClick(Press, 0, 0); // finish the click that was interrupted
       } else if(promoSweep != EmptySquare) {