IID margin reduced to 128

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 7979fd5b549a349add8853c513ccd5da5388b745..7a8d3253048d2db2d7595493cb242692970f6d57 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -791,7 +791,7 @@ namespace {
     // Step 11. Internal iterative deepening (skipped when in check)
     if (    depth >= 6 * ONE_PLY
         && !ttMove
-        && (PvNode || ss->staticEval + 256 >= beta))
+        && (PvNode || ss->staticEval + 128 >= beta))
     {
         Depth d = 3 * depth / 4 - 2 * ONE_PLY;
         search<NT>(pos, ss, alpha, beta, d, cutNode, true);