Fix eval sign bug in (not-yet-used) null move

[hachu.git] / hachu.c

diff --git a/hachu.c b/hachu.c
index 2af2697..87b227f 100644 (file)
--- a/hachu.c
+++ b/hachu.c
@@ -789,7 +789,8 @@ Init (int var)
 \r
   // piece-square tables\r
   for(i=0; i<BH; i++) for(j=0; j<BH; j++) {\r
-    int s = BW*i + j, d = BH*(BH-2) - (2*i - BH + 1)*(2*i - BH + 1) - (2*j - BH + 1)*(2*j - BH + 1);\r
+    int s = BW*i + j, d = BH*(BH-2) - abs(2*i - BH + 1)*(BH-1) - (2*j - BH + 1)*(2*j - BH + 1);\r
+    PST[s] = 0;\r
     PST[BH+s] = d/4 - (i == 0 || i == BH-1 ? 15 : 0) - (j == 0 || j == BH-1 ? 15 : 0);\r
     PST[BH*BW+s] = d/6;\r
     PST[BH*BW+BH+s] = d/12;\r
@@ -1522,7 +1523,7 @@ if(PATH) /*pboard(board),pmap(attacks, BLACK),*/printf("search(%d) {%d,%d} eval=
   nodes++;\r
   pv[pvPtr++] = 0; // start empty PV, directly behind PV of parent\r
 \r
-  firstMove = curMove = sorted = msp += 20; // leave 20 empty slots in front of move list\r
+  firstMove = curMove = sorted = msp += 50; // leave 50 empty slots in front of move list\r
   tb.fireMask = phase = 0; iterDep=1; replyDep = (depth < 1 ? depth : 1) - 1;\r
   do {\r
 if(flag && depth>= 0) printf("iter %d:%d\n", depth,iterDep),fflush(stdout);\r
@@ -1540,7 +1541,7 @@ if(flag && depth>= 0) printf("phase=%d: first/curr/last = %d / %d / %d\n", phase
 #if 0\r
            if(curEval >= beta) {\r
              stm ^= WHITE;\r
-             score = -Search(-beta, -iterAlpha, difEval, depth-3, promoSuppress & SQUARE, ABSENT);\r
+             score = -Search(-beta, -iterAlpha, -difEval, depth-3, promoSuppress & SQUARE, ABSENT);\r
              stm ^= WHITE;\r
              if(score >= beta) { msp = oldMSP; retDep += 3; return score + (score < curEval); }\r
            }\r
@@ -1611,7 +1612,7 @@ if(PATH) printf("%d:%2d:%2d msp=%d\n",level,depth,iterDep,msp);
       // MOVE EXTRACTION\r
     extractMove:\r
 if(flag & depth >= 0) printf("%2d:%d extract %d/%d\n", depth, iterDep, curMove, msp);\r
-      if(curMove < sorted) {\r
+      if(curMove > sorted) {\r
        move = moveStack[sorted=j=curMove];\r
        for(i=curMove+1; i<msp; i++)\r
          if(moveStack[i] > move) move = moveStack[j=i]; // search move with highest priority\r