Introduce MovePicker::isBadCapture() and use in probcut

[stockfish] / src / movepick.cpp

diff --git a/src/movepick.cpp b/src/movepick.cpp
index d8c9fbbb3341622b4407956894e5656ce8460d32..69d60bade0f5fc93abeb087f1c6463fe1a241abc 100644 (file)
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -46,6 +46,7 @@ namespace {
   const uint8_t QsearchWithoutChecksTable[] = { PH_TT_MOVES, PH_QCAPTURES, PH_STOP };
 }
 
+bool MovePicker::isBadCapture() const { return phase == PH_BAD_CAPTURES; }
 
 /// Constructor for the MovePicker class. Apart from the position for which
 /// it is asked to pick legal moves, MovePicker also wants some information
@@ -110,7 +111,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const History& h)
       // Skip TT move if is not a capture or a promotion, this avoids
       // qsearch tree explosion due to a possible perpetual check or
       // similar rare cases when TT table is full.
-      if (ttm != MOVE_NONE && !pos.move_is_capture_or_promotion(ttm))
+      if (ttm != MOVE_NONE && !pos.move_is_capture(ttm) && !move_is_promotion(ttm))
           searchTT = ttMoves[0].move = MOVE_NONE;
   }