X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=55df6172c64c779d890431bc6f0f42abab2cc9fb;hp=2ad535ccb56b93ce1690eff7e9d800df1f077d23;hb=328bdd0947ea7903ee1061c8eb60bc3121a4eb19;hpb=70a38d726410dae06949e9cfd6be2fd58743101a

diff --git a/src/search.cpp b/src/search.cpp
index 2ad535cc..55df6172 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -191,7 +191,7 @@ namespace {
 void Search::init() {
 
   for (int i = 1; i < MAX_MOVES; ++i)
-      Reductions[i] = int(23.4 * std::log(i));
+      Reductions[i] = int((23.4 + std::log(Threads.size()) / 2) * std::log(i));
 }
 
 
@@ -1008,7 +1008,7 @@ moves_loop: // When in check, search starts from here
                && pos.advanced_pawn_push(move)
                && pos.pawn_passed(us, to_sq(move)))
           extension = ONE_PLY;
-          
+
       // Castling extension
       if (type_of(move) == CASTLING)
           extension = ONE_PLY;