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Added winning_probability_coefficient option to specify the coefficient to calculate the winning probability from a value. #71

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nodchip
2020-08-15 11:57:08 +09:00
parent 75b9d6f6b1
commit 79654ac509
1 changed files with 4 additions and 1 deletions
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5
src/learn/learner.cpp
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@@ -120,6 +120,8 @@ bool use_draw_games_in_validation = false;
bool skip_duplicated_positions_in_training = true;
bool detect_draw_by_consecutive_low_score = false;
bool detect_draw_by_insufficient_mating_material = false;
// 1.0 / PawnValueEg / 4.0 * log(10.0)
double winning_probability_coefficient = 0.00276753015984861260098316280611;
// -----------------------------------
// write phase file
@@ -1147,7 +1149,7 @@ double winning_percentage(double value)
// 1/(1+10^(-Eval/4))
// = 1/(1+e^(-Eval/4*ln(10))
// = sigmoid(Eval/4*ln(10))
return sigmoid(value / PawnValueEg / 4.0 * log(10.0));
return sigmoid(value * winning_probability_coefficient);
}
double dsigmoid(double x)
{
@@ -3072,6 +3074,7 @@ void learn(Position&, istringstream& is)
else if (option == "use_draw_in_validation" || option == "use_draw_games_in_validation") is >> use_draw_games_in_validation;
// Accept also the old option name.
else if (option == "use_hash_in_training" || option == "skip_duplicated_positions_in_training") is >> skip_duplicated_positions_in_training;
else if (option == "winning_probability_coefficient") is >> winning_probability_coefficient;
// Discount rate
else if (option == "discount_rate") is >> discount_rate;