NMP Tweaks

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 7a16ef8cfc08af9da7ab9e374d5baf338a5d8026..f0fa6f05132522d5ca043e3a56e51841ab2c16a2 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -799,7 +799,8 @@ namespace {
         && (ss-1)->currentMove != MOVE_NULL
         && (ss-1)->statScore < 22661
         &&  eval >= beta
-        &&  ss->staticEval >= beta - 33 * depth / ONE_PLY + 299
+        &&  eval >= ss->staticEval
+        &&  ss->staticEval >= beta - 33 * depth / ONE_PLY + 299 - improving * 30
         && !excludedMove
         &&  pos.non_pawn_material(us)
         && (ss->ply >= thisThread->nmpMinPly || us != thisThread->nmpColor))