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https://github.com/sockspls/badfish
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005ad170c1
In lazySMP it makes sense to prune a little more, as multiple threads search wider. We thus increase the prefactor of the reductions slowly as a function of the threads. The prefactor of the log(threads) term is a parameter, this pull request uses 1/2 after testing. passed STC @ 8threads: LLR: 2.96 (-2.94,2.94) [0.50,4.50] Total: 118125 W: 23151 L: 22462 D: 72512 http://tests.stockfishchess.org/tests/view/5d8bbf4d0ebc59509180f217 passed LTC @ 8threads: LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 67546 W: 10630 L: 10279 D: 46637 http://tests.stockfishchess.org/tests/view/5d8c463b0ebc5950918167e8 passed ~LTC @ 14threads: LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 74271 W: 12421 L: 12040 D: 49810 http://tests.stockfishchess.org/tests/view/5d8db1f50ebc590f3beb24ef Note: A larger prefactor (1) passed similar tests at STC and LTC (8 threads), while a very large one (2) passed STC quickly but failed LTC (8 threads). For the single-threaded case there is no functional change. Closes https://github.com/official-stockfish/Stockfish/pull/2337 Bench: 4088701 Fixup: remove redundant code.
53 lines
1.4 KiB
C++
53 lines
1.4 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) 2015-2019 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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#include <iostream>
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#include "bitboard.h"
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#include "position.h"
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#include "search.h"
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#include "thread.h"
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#include "tt.h"
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#include "uci.h"
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#include "endgame.h"
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#include "syzygy/tbprobe.h"
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namespace PSQT {
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void init();
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}
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int main(int argc, char* argv[]) {
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std::cout << engine_info() << std::endl;
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UCI::init(Options);
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PSQT::init();
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Bitboards::init();
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Position::init();
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Bitbases::init();
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Endgames::init();
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Threads.set(Options["Threads"]);
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Search::clear(); // After threads are up
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UCI::loop(argc, argv);
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Threads.set(0);
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return 0;
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}
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