2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #ifndef TIMEMAN_H_INCLUDED
21 #define TIMEMAN_H_INCLUDED
26 /// The TimeManagement class computes the optimal time to think depending on
27 /// the maximum available time, the game move number and other parameters.
29 class TimeManagement {
31 void init(Search::LimitsType& limits, Color us, int ply, TimePoint now);
32 void pv_instability(double bestMoveChanges) { unstablePvFactor = 1 + bestMoveChanges; }
33 int available() const { return int(optimumTime * unstablePvFactor * 0.76); }
34 int maximum() const { return maximumTime; }
35 int elapsed() const { return int(Search::Limits.npmsec ? Search::RootPos.nodes_searched() : now() - start); }
37 int64_t availableNodes; // When in 'nodes as time' mode
43 double unstablePvFactor;
46 extern TimeManagement Time;
48 #endif // #ifndef TIMEMAN_H_INCLUDED