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Rescale UCI scores to PawnValueEg

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This is more consistent with what other engines are doing.
Often people thinks that SF's scores are overblown. In the
end, it just boils down to the arbitrary way of rescaling them.

No functional change.
This commit is contained in:
Lucas Braesch 2014-04-06 11:43:30 +02:00 • committed by Marco Costalba
parent 64d29a6330
commit 0d8a4c7565
3 changed files with 4 additions and 4 deletions
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2
src/evaluate.cpp
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@ -939,7 +939,7 @@ Value do_evaluate(const Position& pos) {
// Tracing function definitions // Tracing function definitions
double Tracing::to_cp(Value v) { return double(v) / PawnValueMg; } double Tracing::to_cp(Value v) { return double(v) / PawnValueEg; }
void Tracing::add_term(int idx, Score wScore, Score bScore) { void Tracing::add_term(int idx, Score wScore, Score bScore) {

4
src/notation.cpp
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@ -43,7 +43,7 @@ string score_to_uci(Value v, Value alpha, Value beta) {
stringstream ss; stringstream ss;
if (abs(v) < VALUE_MATE_IN_MAX_PLY) if (abs(v) < VALUE_MATE_IN_MAX_PLY)
ss << "cp " << v * 100 / int(PawnValueMg); ss << "cp " << v * 100 / int(PawnValueEg);
else else
ss << "mate " << (v > 0 ? VALUE_MATE - v + 1 : -VALUE_MATE - v) / 2; ss << "mate " << (v > 0 ? VALUE_MATE - v + 1 : -VALUE_MATE - v) / 2;
@ -207,7 +207,7 @@ static string format(Value v) {
ss << "-#" << (VALUE_MATE + v) / 2; ss << "-#" << (VALUE_MATE + v) / 2;
else else
ss << setprecision(2) << fixed << showpos << double(v) / PawnValueMg; ss << setprecision(2) << fixed << showpos << double(v) / PawnValueEg;
return ss.str(); return ss.str();
} }

2
src/search.cpp
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@ -185,7 +185,7 @@ void Search::think() {
RootColor = RootPos.side_to_move(); RootColor = RootPos.side_to_move();
TimeMgr.init(Limits, RootPos.game_ply(), RootColor); TimeMgr.init(Limits, RootPos.game_ply(), RootColor);
int cf = Options["Contempt Factor"] * PawnValueMg / 100; // From centipawns int cf = Options["Contempt Factor"] * PawnValueEg / 100; // From centipawns
DrawValue[ RootColor] = VALUE_DRAW - Value(cf); DrawValue[ RootColor] = VALUE_DRAW - Value(cf);
DrawValue[~RootColor] = VALUE_DRAW + Value(cf); DrawValue[~RootColor] = VALUE_DRAW + Value(cf);