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Adjust history usage in moves loop pruning
After experiments with conthist 5 addition failed really bad divions by 2 passed as a gainer. Passed STC: https://tests.stockfishchess.org/tests/view/6636d7114b68b70d858035ce LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 35936 W: 9287 L: 8976 D: 17673 Ptnml(0-2): 81, 4129, 9234, 4446, 78 Passed LTC: https://tests.stockfishchess.org/tests/view/6636ddb64b68b70d858040a8 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 82428 W: 21035 L: 20622 D: 40771 Ptnml(0-2): 29, 8985, 22775, 9394, 31 closes https://github.com/official-stockfish/Stockfish/pull/5217 Bench: 2309253
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@ -991,7 +991,7 @@ moves_loop: // When in check, search starts here
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int history =
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(*contHist[0])[movedPiece][move.to_sq()]
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+ (*contHist[1])[movedPiece][move.to_sq()]
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+ (*contHist[3])[movedPiece][move.to_sq()]
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+ (*contHist[3])[movedPiece][move.to_sq()] / 2
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+ thisThread->pawnHistory[pawn_structure_index(pos)][movedPiece][move.to_sq()];
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// Continuation history based pruning (~2 Elo)
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