Found by spsa tuning at 45+0.45 with:
```
int fpcEvalOffset = 188;
int fpcLmrDepthMult = 206;
int histDepthMult = -3232;
int histDenom = 5793;
int fpEvalOffset = 115;
int negSeeDepthMultSq = -27;
TUNE(SetRange(0, 394), fpcEvalOffset);
TUNE(SetRange(0, 412), fpcLmrDepthMult);
TUNE(SetRange(-6464, -1616), histDepthMult);
TUNE(SetRange(2896, 11586), histDenom);
TUNE(SetRange(0, 230), fpEvalOffset);
TUNE(SetRange(-54, 0), negSeeDepthMultSq);
```
Passed STC:
https://tests.stockfishchess.org/tests/view/
6535551de746e058e6c0165d
LLR: 2.98 (-2.94,2.94) <0.00,2.00>
Total: 109056 W: 28025 L: 27599 D: 53432
Ptnml(0-2): 357, 12669, 28038, 13119, 345
Passed LTC:
https://tests.stockfishchess.org/tests/view/
65364c6ff127f3553505175d
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 61290 W: 15316 L: 14941 D: 31033
Ptnml(0-2): 34, 6849, 16498, 7236, 28
closes https://github.com/official-stockfish/Stockfish/pull/4847
bench
1167412
{
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;
+ (*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);