Consider counting ply in TT

fairy-stockfish · Feb 11, 2021 · c67c567 · c67c567
1 parent 100b4d1
commit c67c567
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/position.h b/src/position.h
@@ -1073,6 +1073,8 @@ inline int Position::pawns_on_same_color_squares(Color c, Square s) const {
 }
 
 inline Key Position::key() const {
+  if (st->countingLimit)
+      return st->countingPly < 14 ? st->key : st->key ^ make_key((st->countingPly - 14) / 8);
   return st->rule50 < 14 ? st->key
                          : st->key ^ make_key((st->rule50 - 14) / 8);
 }