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01f2466f6e
Rescales the king danger variables in evaluate_king() to suppress the KingDanger[] array. This avoids the cost of the memory accesses to the array and simplifies the non-linear transformation used. Full credits to "hxim" for the seminal idea and implementation, see pull request #786. https://github.com/official-stockfish/Stockfish/pull/786 Passed STC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 9649 W: 1829 L: 1689 D: 6131 Passed LTC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 53494 W: 7254 L: 7178 D: 39062 Bench: 6116200
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
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Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
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Stockfish is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Stockfish is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EVALUATE_H_INCLUDED
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#define EVALUATE_H_INCLUDED
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#include <string>
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#include "types.h"
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class Position;
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namespace Eval {
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const Value Tempo = Value(20); // Must be visible to search
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std::string trace(const Position& pos);
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template<bool DoTrace = false>
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Value evaluate(const Position& pos);
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}
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#endif // #ifndef EVALUATE_H_INCLUDED
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