From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Mon, 6 Feb 2017 22:02:30 +0000 (+0100)
Subject: Allow only moves that beat alpha to become best move
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=b27e913c5348fbd84459c1e2b924f5209b276400;p=crazywa.git

Allow only moves that beat alpha to become best move

In case of a fail low we don't want to sort a garbage move in front for
the next iteration.
---

diff --git a/dropper.c b/dropper.c
index 2d8f108..912f5f0 100644
--- a/dropper.c
+++ b/dropper.c
@@ -1290,10 +1290,10 @@ printf("%d:%d:%d %2d. %08x %c%d%c%d %6d %6d %6d\n",ply,depth,iterDepth,curMove,m
 	    if(f.depth < resultDepth) resultDepth = f.depth;
 
 	    if(score > bestScore) {
-		bestScore = score; bestNr = curMove;
+		bestScore = score;
 		if(score > alpha) {
 		    int *tail;
-		    alpha = score;
+		    alpha = score; bestNr = curMove;
 		    history[moveStack[curMove] & 0xFFFF] += iterDepth*iterDepth;
 		    if(score >= beta) { // beta cutoff
 			if(curMove >= m.nonCapts && moveStack[curMove] != killers[ply][1])