From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Mon, 3 Nov 2014 20:51:46 +0000 (+0100)
Subject: Fix sweep promotions for Lance on deeper zones
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=07713bc9c098f6accb3228d75319256cd1eaef1a;p=xboard.git

Fix sweep promotions for Lance on deeper zones

Unlike Pawns, Lances always assumed a zone depth of 1 in deciding on
activating sweep promotion. (Because they did not naturally occur in
any variant that had a deeper zone.)
---

diff --git a/backend.c b/backend.c
index 552935e..bdafe3d 100644
--- a/backend.c
+++ b/backend.c
@@ -7323,8 +7323,8 @@ CanPromote (ChessSquare piece, int y)
          gameInfo.variant == VariantMakruk   || gameInfo.variant == VariantASEAN) return FALSE;
 	return (piece == BlackPawn && y <= zone ||
 		piece == WhitePawn && y >= BOARD_HEIGHT-1-zone ||
-		piece == BlackLance && y == 1 ||
-		piece == WhiteLance && y == BOARD_HEIGHT-2 );
+		piece == BlackLance && y <= zone ||
+		piece == WhiteLance && y >= BOARD_HEIGHT-1-zone );
 }
 
 void