X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=9a6bd86386807019e73d2eaba746fb6e3a0d0b44;hp=99b89459b708d097ec3b7dbc605d17d3a05b4639;hb=187a9fe5e7b8349b9eacf23e11cb801a32bb6b12;hpb=f4dcec0b942703cf0e9bad1da7e64dfa252e915d

diff --git a/src/search.cpp b/src/search.cpp
index 99b89459..9a6bd863 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -868,6 +868,13 @@ moves_loop: // When in check and at SpNode search starts from here
           if (move == countermoves[0] || move == countermoves[1])
               ss->reduction = std::max(DEPTH_ZERO, ss->reduction - ONE_PLY);
 
+          // Decrease reduction for moves that escape a capture
+          if (   ss->reduction
+              && type_of(move) == NORMAL
+              && type_of(pos.piece_on(to_sq(move))) != PAWN
+              && pos.see(make_move(to_sq(move), from_sq(move))) < 0)
+              ss->reduction = std::max(DEPTH_ZERO, ss->reduction - ONE_PLY);
+
           Depth d = std::max(newDepth - ss->reduction, ONE_PLY);
           if (SpNode)
               alpha = splitPoint->alpha;
@@ -1546,7 +1553,7 @@ void Thread::idle_loop() {
           if (Threads.size() > 2)
               for (size_t i = 0; i < Threads.size(); ++i)
               {
-                  int size = Threads[i]->splitPointsSize; // Local copy
+                  const int size = Threads[i]->splitPointsSize; // Local copy
                   sp = size ? &Threads[i]->splitPoints[size - 1] : NULL;
 
                   if (   sp