X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.h;h=a1d53f042c8cb111124746c0b68919bb6285ddb5;hp=5539b7a6faa660da7897c7caf43d0b5d662102bf;hb=3dc9f952253050627ca3fa14302a3edb4f991d32;hpb=71e852ea815be8dd718685cb9e15ccdb8b756211

diff --git a/src/position.h b/src/position.h
index 5539b7a6..a1d53f04 100644
--- a/src/position.h
+++ b/src/position.h
@@ -249,6 +249,7 @@ public:
 
   // Accessing hash keys
   Key get_key() const;
+  Key get_exclusion_key() const;
   Key get_pawn_key() const;
   Key get_material_key() const;
 
@@ -337,6 +338,7 @@ private:
   static Key zobMaterial[2][8][16];
   static Key zobSideToMove;
   static Score PieceSquareTable[16][64];
+  static Key zobExclusion;
 };
 
 
@@ -501,6 +503,10 @@ inline Key Position::get_key() const {
   return st->key;
 }
 
+inline Key Position::get_exclusion_key() const {
+  return st->key ^ zobExclusion;
+}
+
 inline Key Position::get_pawn_key() const {
   return st->pawnKey;
 }