From 88dc8e222151bd89a99815735189eab5454f0aad Mon Sep 17 00:00:00 2001
From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Wed, 8 Oct 2014 08:56:21 +0200
Subject: [PATCH] Repair Seirawan gating

The overhaul of promotion code had forgotton to strip off the virginity
and color bits of the gated piece (gt) when assigning it to the promotion
piece type. With as a result that garbage characters were printed as
promotion suffix in gating moves.
---
 fairymax.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fairymax.c b/fairymax.c
index 470c03a..5ec3380 100644
--- a/fairymax.c
+++ b/fairymax.c
@@ -231,7 +231,7 @@ int k,q,l,e,E,z,n;      /* (q,l)=window, e=current eval. score, E=e.p. sqr.*/
         }
         if(z&S&&K-I)                           /* move pending: check legal*/
         {if(v+I&&x==K&y==L&gt==GT)             /*   if move found          */
-         {Q=-e-i;O=F;LL=L;prom=gt;
+         {Q=-e-i;O=F;LL=L;prom=gt&15;
           if(b[y]-u&15)prom=b[y]-=PromPiece,   /* (under-)promotion:       */
            Q-=abs(w[prom&=15])-w[p]-(6*S>>sh), /*  correct piece & score & */
                        Z+=PromPiece;           /*  invalidate hash         */
@@ -587,6 +587,7 @@ int main(int argc, char **argv)
                             m = GetTickCount() - Ticks;
                             printf("# times @ %u: real=%d cpu=%1.0f\n", m + Ticks, m,
                                       (CPUtime() - cpuT)/CLOCKS_PER_SEC);
+printf("promo = %d (%c) GT = %d\n", prom, prom + '`', GT); 
                             printf("move ");
                             printf("%c%c%c%c",'a'+(K&15),'0'+BH-(K>>4),
                                           'a'+(L&15),'0'+BH-(L>>4));
-- 
1.7.0.4