small fix to board jump heuristic

mbluemer · May 2, 2017 · 51e6447 · 51e6447
1 parent 98dd9eb
commit 51e6447
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/src/Heuristic.cpp b/src/Heuristic.cpp
@@ -5,8 +5,7 @@
 #include "Heuristic.hpp"
 
 /* Heuristic Functions */
-
-// counts number of setbits
+//
 
 using BB = BitBoard;
 
@@ -161,12 +160,12 @@ int Heuristic::jumpeablePieces() const
     temp = (board->rotr32(emptyPos, 1) & BB::downLeft) & w;
     accumP |= (board->rotr32(temp, 1) & BB::downLeft) & b;
     temp = (board->rotl32(emptyPos, 7) & BB::upLeft) & w;
-    accumP |= (board->rotr32(temp, 7) & BB::upLeft) & kings;
+    accumP |= (board->rotl32(temp, 7) & BB::upLeft) & kings;
     temp = (board->rotl32(emptyPos, 1) & BB::upRight) & w;
     accumP |= (board->rotl32(temp, 1) & BB::upRight) & kings;
   } else {
     temp = (board->rotl32(emptyPos, 7) & BB::upLeft) & b;
-    accumP |= (board->rotr32(temp, 7) & BB::upLeft) & w;
+    accumP |= (board->rotl32(temp, 7) & BB::upLeft) & w;
     temp = (board->rotl32(emptyPos, 1) & BB::upRight) & b;
     accumP |= (board->rotl32(temp, 1) & BB::upRight) & w;
     temp = (board->rotr32(emptyPos, 7) & BB::downRight) & b;