Asymmetry bonus for the attacking side

[stockfish] / src / pawns.h

diff --git a/src/pawns.h b/src/pawns.h
index aacaf7247713616910c5e0b5ddb6e3ac68ba04cd..2b978ba0eec39224cf09565fec20164761c2daa2 100644 (file)
--- a/src/pawns.h
+++ b/src/pawns.h
@@ -36,6 +36,7 @@ struct Entry {
   Bitboard pawn_attacks(Color c) const { return pawnAttacks[c]; }
   Bitboard passed_pawns(Color c) const { return passedPawns[c]; }
   int pawn_span(Color c) const { return pawnSpan[c]; }
+  int pawn_asymmetry() const { return asymmetry; }
 
   int semiopen_file(Color c, File f) const {
     return semiopenFiles[c] & (1 << f);
@@ -71,6 +72,7 @@ struct Entry {
   int semiopenFiles[COLOR_NB];
   int pawnSpan[COLOR_NB];
   int pawnsOnSquares[COLOR_NB][COLOR_NB]; // [color][light/dark squares]
+  int asymmetry;
 };
 
 typedef HashTable<Entry, 16384> Table;