From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Tue, 17 Jan 2017 17:53:27 +0000 (+0100)
Subject: Fix e.p. capture in ICS play
X-Git-Url: http://winboard.nl/cgi-bin?p=xboard.git;a=commitdiff_plain;h=985cec56a6e655776b35dfeaf338f748808651da

Fix e.p. capture in ICS play

The new e.p. rights were not set when the position was obtained
by parsing an ICS board, rather than from applying a move to a previous
position.
---

diff --git a/backend.c b/backend.c
index ad19851..4537da1 100644
--- a/backend.c
+++ b/backend.c
@@ -4741,7 +4741,13 @@ ParseBoard12 (char *string)
     boards[moveNum][EP_STATUS] = EP_NONE;
     if(str[0] == 'P') boards[moveNum][EP_STATUS] = EP_PAWN_MOVE;
     if(strchr(move_str, 'x')) boards[moveNum][EP_STATUS] = EP_CAPTURE;
-    if(double_push !=  -1) boards[moveNum][EP_STATUS] = double_push + BOARD_LEFT;
+    if(double_push !=  -1) {
+	int dir = WhiteOnMove(moveNum) ? 1 : -1, last = BOARD_HEIGHT-1;
+	boards[moveNum][EP_FILE] = // also set new e.p. variables
+	boards[moveNum][EP_STATUS] = double_push + BOARD_LEFT;
+	boards[moveNum][EP_RANK] = (last + 3*dir)/2;
+	boards[moveNum][LAST_TO] = 128*(last + dir) + boards[moveNum][EP_FILE];
+    } else boards[moveNum][EP_FILE] = boards[moveNum][EP_RANK] = 100;
 
 
     if (ics_getting_history == H_GOT_REQ_HEADER ||