X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=d19c9a9015423192991319e4e6b910db955c4e8e;hp=c5d6e36bf153649cb788a3c2ea87b435a030029d;hb=13d1776a983c8b6b8ee2ed83ef7d2a4a5caf93a9;hpb=a56e1c662c3aa04b88744d62790daa10c01cdc78;ds=sidebyside

diff --git a/src/search.cpp b/src/search.cpp
index c5d6e36b..d19c9a90 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -931,6 +931,7 @@ namespace {
     {
       assert(move_is_ok(move));
 
+      bool fewMoves = (depth <= OnePly && mp.number_of_moves() < 4);
       bool singleReply = (pos.is_check() && mp.number_of_moves() == 1);
       bool moveIsCheck = pos.move_is_check(move, dcCandidates);
       bool moveIsCapture = pos.move_is_capture(move);
@@ -942,7 +943,7 @@ namespace {
         PawnValueMidgame : pos.midgame_value_of_piece_on(move_to(move));
 
       // Decide the new search depth
-      Depth ext = extension(pos, move, true, moveIsCheck, singleReply, mateThreat);
+      Depth ext = extension(pos, move, true, moveIsCheck, singleReply || fewMoves, mateThreat);
       Depth newDepth = depth - OnePly + ext;
 
       // Make and search the move