Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
- Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+ Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
enum TimeType { OptimumTime, MaxTime };
const int MoveHorizon = 50; // Plan time management at most this many moves ahead
- const double MaxRatio = 7.09; // When in trouble, we can step over reserved time with this ratio
- const double StealRatio = 0.35; // However we must not steal time from remaining moves over this ratio
+ const double MaxRatio = 7.3; // When in trouble, we can step over reserved time with this ratio
+ const double StealRatio = 0.34; // However we must not steal time from remaining moves over this ratio
// move_importance() is a skew-logistic function based on naive statistical
double move_importance(int ply) {
- const double XScale = 7.64;
- const double XShift = 58.4;
- const double Skew = 0.183;
+ const double XScale = 6.85;
+ const double XShift = 64.5;
+ const double Skew = 0.171;
return pow((1 + exp((ply - XShift) / XScale)), -Skew) + DBL_MIN; // Ensure non-zero
}
template<TimeType T>
- int remaining(int myTime, int movesToGo, int ply, int slowMover)
- {
+ int remaining(int myTime, int movesToGo, int ply, int slowMover) {
+
const double TMaxRatio = (T == OptimumTime ? 1 : MaxRatio);
const double TStealRatio = (T == OptimumTime ? 0 : StealRatio);
/// inc > 0 && movestogo == 0 means: x basetime + z increment
/// inc > 0 && movestogo != 0 means: x moves in y minutes + z increment
-void TimeManagement::init(Search::LimitsType& limits, Color us, int ply)
-{
+void TimeManagement::init(Search::LimitsType& limits, Color us, int ply) {
+
int minThinkingTime = Options["Minimum Thinking Time"];
int moveOverhead = Options["Move Overhead"];
int slowMover = Options["Slow Mover"];