Remove depth dependence and use same limit (2000) as stat_bonus

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 807d261472fc091b96f7aaf71ec46c784a1f810a..c4ed73372df2040ffee3bc7093e61e9301011ecd 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -801,7 +801,7 @@ namespace {
     // Use static evaluation difference to improve quiet move ordering
     if (is_ok((ss-1)->currentMove) && !(ss-1)->inCheck && !priorCapture)
     {
-        int bonus = std::clamp(-depth * 4 * int((ss-1)->staticEval + ss->staticEval), -1000, 1000);
+        int bonus = std::clamp(-16 * int((ss-1)->staticEval + ss->staticEval), -2000, 2000);
         thisThread->mainHistory[~us][from_to((ss-1)->currentMove)] << bonus;
     }
 
@@ -1063,7 +1063,7 @@ moves_loop: // When in check, search starts here
                   && history < -3000 * depth + 3000)
                   continue;
 
-              history += thisThread->mainHistory[us][from_to(move)];                  
+              history += thisThread->mainHistory[us][from_to(move)];
 
               // Futility pruning: parent node (~5 Elo)
               if (   !ss->inCheck