Remove duplication. (#2068)

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index cf934fc92c15434066828c72498f87f0d7f8e340..3319ee94798ea234dee492d3ebd338e033df127f 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -116,13 +116,6 @@ namespace {
   void update_quiet_stats(const Position& pos, Stack* ss, Move move, Move* quiets, int quietCount, int bonus);
   void update_capture_stats(const Position& pos, Move move, Move* captures, int captureCount, int bonus);
 
-  inline bool gives_check(const Position& pos, Move move) {
-    Color us = pos.side_to_move();
-    return  type_of(move) == NORMAL && !(pos.blockers_for_king(~us) & pos.pieces(us))
-          ? pos.check_squares(type_of(pos.moved_piece(move))) & to_sq(move)
-          : pos.gives_check(move);
-  }
-
   // perft() is our utility to verify move generation. All the leaf nodes up
   // to the given depth are generated and counted, and the sum is returned.
   template<bool Root>
@@ -887,7 +880,7 @@ moves_loop: // When in check, search starts from here
       extension = DEPTH_ZERO;
       captureOrPromotion = pos.capture_or_promotion(move);
       movedPiece = pos.moved_piece(move);
-      givesCheck = gives_check(pos, move);
+      givesCheck = pos.gives_check(move);
 
       // Step 13. Extensions (~70 Elo)
 
@@ -970,8 +963,7 @@ moves_loop: // When in check, search starts from here
               if (!pos.see_ge(move, Value(-29 * lmrDepth * lmrDepth)))
                   continue;
           }
-          else if (   !extension // (~20 Elo)
-                   && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY)))
+          else if (!pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
                   continue;
       }
 
@@ -1314,7 +1306,7 @@ moves_loop: // When in check, search starts from here
     {
       assert(is_ok(move));
 
-      givesCheck = gives_check(pos, move);
+      givesCheck = pos.gives_check(move);
 
       moveCount++;