Avoid search tree explosion in qsearch

[stockfish] / src / position.cpp

diff --git a/src/position.cpp b/src/position.cpp
index 2b6e2b4c07a5e84640d839cd6aca37b77abf9f6d..2508db669dfb2241ed0e4c322fbfb6fbd8d0cfe0 100644 (file)
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -356,8 +356,9 @@ void Position::print(Move m) const {
   std::cout << std::endl;
   if (m != MOVE_NONE)
   {
+      Position p(*this);
       string col = (color_of_piece_on(move_from(m)) == BLACK ? ".." : "");
-      std::cout << "Move is: " << col << move_to_san(*this, m) << std::endl;
+      std::cout << "Move is: " << col << move_to_san(p, m) << std::endl;
   }
   for (Rank rank = RANK_8; rank >= RANK_1; rank--)
   {
@@ -1300,6 +1301,11 @@ void Position::undo_null_move() {
 }
 
 
+///
+PieceType Position::captured_piece() const {
+  return st->capture;
+}
+
 /// Position::see() is a static exchange evaluator: It tries to estimate the
 /// material gain or loss resulting from a move. There are three versions of
 /// this function: One which takes a destination square as input, one takes a