From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Tue, 26 Feb 2013 14:15:20 +0000 (+0100)
Subject: Fix promotion value Shatranj / Courier / Makruk
X-Git-Tag: 4.8S~3
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=728c69e5f456df46ddb7391c7f02be3145ace80d;p=fairymax.git

Fix promotion value Shatranj / Courier / Makruk

The patch to use true piece value in game-level promotions broke variants
in which promotion is to the worthless Ferz. Because in subtrating the
default score it did not take into account the division by 8 this has
in the search for such variants.
---

diff --git a/fairymax.c b/fairymax.c
index c893b37..3bd0c69 100644
--- a/fairymax.c
+++ b/fairymax.c
@@ -232,7 +232,7 @@ int k,q,l,e,E,z,n;      /* (q,l)=window, e=current eval. score, E=e.p. sqr.*/
         {if(v+I&&x==K&y==L&gt==GT)             /*   if move found          */
          {Q=-e-i;O=F;LL=L;prom=gt;
           if(b[y]-u&15)prom=b[y]-=PromPiece,   /* (under-)promotion:       */
-           Q-=abs(w[prom&=15])-w[p]-6*S,       /*  correct piece & score & */
+           Q-=abs(w[prom&=15])-w[p]-(6*S>>sh), /*  correct piece & score & */
                        Z+=PromPiece;           /*  invalidate hash         */
           a->D=99;a->V=0;                      /* lock game in hash as draw*/
           R-=i/FAC;                            /*** total captd material ***/