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Remove slowMover 

Removes a slowMover and one paramater from move_importance function.

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 77023 W: 14456 L: 14433 D: 48134

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 37175 W: 5190 L: 5092 D: 26893

Resolves #589
pull/589/merge
IIvec 2016-02-21 20:16:28 +00:00 committed by Joona Kiiski
parent bfe9044ad9
commit 77fa960f89
2 changed files with 10 additions and 14 deletions
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23
src/timeman.cpp
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@ -37,27 +37,25 @@ namespace {
const double StealRatio = 0.35; // However we must not steal time from remaining moves over this ratio
// move_importance() is a skew-logistic function based on naive statistical
// analysis of "how many games are still undecided after n half-moves". Game
// is considered "undecided" as long as neither side has >275cp advantage.
// Data was extracted from the CCRL game database with some simple filtering criteria.
// move_importance() is an exponential function based on naive observation
// that a game is closer to be decided after each half-move. This function
// should be decreasing and with "nice" convexity properties.
double move_importance(int ply) {
const double XScale = 7.64;
const double XShift = 58.4;
const double Skew = 0.183;
const double PlyScale = 109.3265;
const double PlyGrowth = 4.0;
return pow((1 + exp((ply - XShift) / XScale)), -Skew) + DBL_MIN; // Ensure non-zero
return exp(-pow(ply / PlyScale, PlyGrowth)) + 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)
{
const double TMaxRatio = (T == OptimumTime ? 1 : MaxRatio);
const double TStealRatio = (T == OptimumTime ? 0 : StealRatio);
double moveImportance = (move_importance(ply) * slowMover) / 100;
double moveImportance = move_importance(ply);
double otherMovesImportance = 0;
for (int i = 1; i < movesToGo; ++i)
@ -85,7 +83,6 @@ 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"];
int npmsec = Options["nodestime"];
// If we have to play in 'nodes as time' mode, then convert from time
@ -120,8 +117,8 @@ void TimeManagement::init(Search::LimitsType& limits, Color us, int ply)
hypMyTime = std::max(hypMyTime, 0);
int t1 = minThinkingTime + remaining<OptimumTime>(hypMyTime, hypMTG, ply, slowMover);
int t2 = minThinkingTime + remaining<MaxTime >(hypMyTime, hypMTG, ply, slowMover);
int t1 = minThinkingTime + remaining<OptimumTime>(hypMyTime, hypMTG, ply);
int t2 = minThinkingTime + remaining<MaxTime >(hypMyTime, hypMTG, ply);
optimumTime = std::min(t1, optimumTime);
maximumTime = std::min(t2, maximumTime);

1
src/ucioption.cpp
View File

@ -67,7 +67,6 @@ void init(OptionsMap& o) {
o["Skill Level"] << Option(20, 0, 20);
o["Move Overhead"] << Option(30, 0, 5000);
o["Minimum Thinking Time"] << Option(20, 0, 5000);
o["Slow Mover"] << Option(89, 10, 1000);
o["nodestime"] << Option(0, 0, 10000);
o["UCI_Chess960"] << Option(false);
o["SyzygyPath"] << Option("<empty>", on_tb_path);