Update 5 search params for pruning at shallow depth

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index ad4b458e180b26d3a0772d277776d7a077a716c2..9cef7e5f558225f5d6be62329f5ac47c2fe9c34a 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -974,7 +974,7 @@ moves_loop:  // When in check, search starts here
                 {
                     Piece capturedPiece = pos.piece_on(to_sq(move));
                     int   futilityEval =
-                      ss->staticEval + 188 + 206 * lmrDepth + PieceValue[capturedPiece]
+                      ss->staticEval + 239 + 291 * lmrDepth + PieceValue[capturedPiece]
                       + captureHistory[movedPiece][to_sq(move)][type_of(capturedPiece)] / 7;
                     if (futilityEval < alpha)
                         continue;
@@ -991,16 +991,16 @@ moves_loop:  // When in check, search starts here
                             + (*contHist[3])[movedPiece][to_sq(move)];
 
                 // Continuation history based pruning (~2 Elo)
-                if (lmrDepth < 6 && history < -3232 * depth)
+                if (lmrDepth < 6 && history < -3498 * depth)
                     continue;
 
                 history += 2 * thisThread->mainHistory[us][from_to(move)];
 
-                lmrDepth += history / 5793;
+                lmrDepth += history / 7815;
                 lmrDepth = std::max(lmrDepth, -2);
 
                 // Futility pruning: parent node (~13 Elo)
-                if (!ss->inCheck && lmrDepth < 13 && ss->staticEval + 115 + 122 * lmrDepth <= alpha)
+                if (!ss->inCheck && lmrDepth < 13 && ss->staticEval + 80 + 122 * lmrDepth <= alpha)
                     continue;
 
                 lmrDepth = std::max(lmrDepth, 0);