Adjust null move pruning constants

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 4650b1579bf0e11dafd78722151ab5d54f0370d5..e5f286e459721321d63e67e437e3b96d8a5e9120 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -829,7 +829,7 @@ namespace {
         assert(eval - beta >= 0);
 
         // Null move dynamic reduction based on depth and value
-        Depth R = (817 + 71 * depth) / 213 + std::min(int(eval - beta) / 192, 3);
+        Depth R = (982 + 85 * depth) / 256 + std::min(int(eval - beta) / 192, 3);
 
         ss->currentMove = MOVE_NULL;
         ss->continuationHistory = &thisThread->continuationHistory[0][0][NO_PIECE][0];