From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Sun, 11 Oct 2009 21:48:55 +0000 (-0700)
Subject: fix for bug #27668: e.p. field still not passed to engine
X-Git-Tag: v4.4.1.20091019~28
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=2fc6fd0719e5aa3e94bdb80b581d849a2ebb4d0f;p=xboard.git

fix for bug #27668: e.p. field still not passed to engine

PositionToFEN now takes the e.p. rights from epStatus[moveNr], rather than
calculating it on the spot from moveList[moveNr-1] (which failed on the first move).
---

diff --git a/backend.c b/backend.c
index afd2196..29f55db 100644
--- a/backend.c
+++ b/backend.c
@@ -13498,6 +13498,14 @@ PositionToFEN(move, overrideCastling)
 	} else {
 	    *p++ = '-';
 	}
+    } else if(move == backwardMostMove) {
+	// [HGM] perhaps we should always do it like this, and forget the above?
+	if(epStatus[move] >= 0) {
+	    *p++ = epStatus[move] + AAA;
+	    *p++ = whiteToPlay ? '6'+BOARD_HEIGHT-8 : '3';
+	} else {
+	    *p++ = '-';
+	}
     } else {
 	*p++ = '-';
     }