From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Mon, 15 May 2017 12:55:06 +0000 (+0200)
Subject: Score quasi-repeats somewhat less severe
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=a974c96cb58fc5daeea447c297b29bbfef2ae7a3;p=crazywa.git

Score quasi-repeats somewhat less severe

When there is a choice between a mate and a quasi-repeat, it is better
to go for the latter.
---

diff --git a/dropper.c b/dropper.c
index c80e510..71342af 100644
--- a/dropper.c
+++ b/dropper.c
@@ -1349,8 +1349,8 @@ if(PATH)printf("%d:%d:%d new iter moveStack[%d..%d]\n",ply,depth,iterDepth,m.fir
 			   
 			}
 		    }
-		    else if(gain == pawn || gain > (450<<21)) score = INF;  // quasi-repeat with extra piece in hand
-		    else if(gain == -pawn || gain < (-450<<21)) score = -INF; // or with one piece less
+		    else if(gain == pawn  || gain >= (400<<21)) score = INF-1;  // quasi-repeat with extra piece in hand
+		    else if(gain == -pawn || gain <= (-400<<21)) score = 1-INF; // or with one piece less
 		    else goto search;// traded one hand piece for another; could still lead somewhere
 		} else { // not a repeat: search it
 		    int lmr;