Simplify stats assignment for Pv nodes

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 411befdedfb460459902ffd8d9fc62fede6cc0d4..390c6b1c72fb37eb87940d71105d7fdf7f3ad80e 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1229,8 +1229,9 @@ moves_loop: // When in check, search starts here
               if (newDepth > d)
                   value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, newDepth, !cutNode);
 
-              int bonus = value > alpha ?  stat_bonus(newDepth)
-                                        : -stat_bonus(newDepth);
+              int bonus = value <= alpha ? -stat_bonus(newDepth)
+                        : value >= beta  ?  stat_bonus(newDepth)
+                                         :  0;
 
               update_continuation_histories(ss, movedPiece, to_sq(move), bonus);
           }
@@ -1255,9 +1256,6 @@ moves_loop: // When in check, search starts here
           (ss+1)->pv[0] = MOVE_NONE;
 
           value = -search<PV>(pos, ss+1, -beta, -alpha, newDepth, false);
-
-          if (moveCount > 1 && newDepth >= depth && !capture)
-              update_continuation_histories(ss, movedPiece, to_sq(move), -stat_bonus(newDepth));
       }
 
       // Step 19. Undo move