From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Mon, 6 Feb 2017 18:05:37 +0000 (+0100)
Subject: Fix deferral
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=211a3986232c56e328d23208f1d89c5b639fe210;p=crazywa.git

Fix deferral

Pieces that could promote would not be allowed to defer. Which is OK for
Crazyhouse, but not for Shogi. Now only pieces that have the must-promote
ormust-promote-one-last-2-ranks flags set get their promotion suppressed
where these flags request it.
---

diff --git a/dropper.c b/dropper.c
index adcd956..d229f91 100644
--- a/dropper.c
+++ b/dropper.c
@@ -805,7 +805,7 @@ MoveGen (int stm, MoveStack *m, int castle)
 		    if((victim & ~COLOR) == 31) return 1; // captures King; abort!
 		    move = piece << 16;   // store piece in move
 		    promote = (inZone | zoneTab[to]) & promoCode[piece-WHITE];
-		    if((promote & (Z_2ND | Z_MUST )) == 0) { // not in place where deferral forbidden
+		    if((promote & ((Z_2ND | Z_MUST ) & ~COLOR)) == 0) { // not in place where deferral forbidden
 			int slot;
 			if(victim) { // capture
 			    slot = --m->firstMove;