From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Mon, 5 Dec 2016 18:47:05 +0000 (+0100)
Subject: Make sure we resign when engine reports we are checkmated
X-Git-Tag: v4.0~42
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=4def9a500291c53f4310761baad1308e21e44081;p=uci2wb.git

Make sure we resign when engine reports we are checkmated

When a UCI engine is set thinking in a checkmated position, the PV
necessarily is empty, and instead of printing an empty 'pv' field in
as pv info, it might omit it alltogether. So we even accept a 'mate 0'
score when there is no PV, so that a following 'bestmove 0000' will
be interpreted as a loss (sending 'resign'), rather than a draw
(sending 1/2-1/2).
---

diff --git a/UCI2WB.c b/UCI2WB.c
index f094d10..8e61b41 100644
--- a/UCI2WB.c
+++ b/UCI2WB.c
@@ -327,6 +327,7 @@ Engine2GUI()
 		if(p = strstr(line+4, " currmovenumber ")) sscanf(p+16,"%d", &currNr);
 		if(pv = strstr(line+4, " pv ")) // convert PV info to WB thinking output
 		    printf("%3d  %6d %6d %10d %s", lastDepth=d, lastScore=s, t, n, Convert(pv+4));
+		else if(s == -100000) lastScore = s; // when checkmated score is valid even without PV (which might not come)
 	    }
 	}
 	else if(!strcmp(command, "option")) { // USI option: extract data fields