Remove redundant condition in probcut

[stockfish] / src / position.cpp

diff --git a/src/position.cpp b/src/position.cpp
index 05a02f158948e73513b33e62e24ef095377c3e4e..76c273316cbe6a225f340bf96a8c163ad0f2766a 100644 (file)
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -46,11 +46,16 @@ Value PieceValue[PHASE_NB][PIECE_NB] = {
 { VALUE_ZERO, PawnValueMg, KnightValueMg, BishopValueMg, RookValueMg, QueenValueMg },
 { VALUE_ZERO, PawnValueEg, KnightValueEg, BishopValueEg, RookValueEg, QueenValueEg } };
 
-Key Zobrist::psq[COLOR_NB][PIECE_TYPE_NB][SQUARE_NB];
-Key Zobrist::enpassant[FILE_NB];
-Key Zobrist::castle[CASTLE_RIGHT_NB];
-Key Zobrist::side;
-Key Zobrist::exclusion;
+namespace Zobrist {
+
+  Key psq[COLOR_NB][PIECE_TYPE_NB][SQUARE_NB];
+  Key enpassant[FILE_NB];
+  Key castle[CASTLE_RIGHT_NB];
+  Key side;
+  Key exclusion;
+}
+
+Key Position::exclusion_key() const { return st->key ^ Zobrist::exclusion;}
 
 namespace {
 
@@ -1327,7 +1332,7 @@ Key Position::compute_material_key() const {
 
   for (Color c = WHITE; c <= BLACK; c++)
       for (PieceType pt = PAWN; pt <= QUEEN; pt++)
-          for (int cnt = 0; cnt < piece_count(c, pt); cnt++)
+          for (int cnt = 0; cnt < pieceCount[c][pt]; cnt++)
               k ^= Zobrist::psq[c][pt][cnt];
 
   return k;
@@ -1363,7 +1368,7 @@ Value Position::compute_non_pawn_material(Color c) const {
   Value value = VALUE_ZERO;
 
   for (PieceType pt = KNIGHT; pt <= QUEEN; pt++)
-      value += piece_count(c, pt) * PieceValue[MG][pt];
+      value += pieceCount[c][pt] * PieceValue[MG][pt];
 
   return value;
 }
@@ -1553,10 +1558,10 @@ bool Position::pos_is_ok(int* failedStep) const {
           for (PieceType pt = PAWN; pt <= KING; pt++)
               for (int i = 0; i < pieceCount[c][pt]; i++)
               {
-                  if (piece_on(piece_list(c, pt)[i]) != make_piece(c, pt))
+                  if (board[pieceList[c][pt][i]] != make_piece(c, pt))
                       return false;
 
-                  if (index[piece_list(c, pt)[i]] != i)
+                  if (index[pieceList[c][pt][i]] != i)
                       return false;
               }