ct = Options["Contempt"] * PawnValueEg / 100; // From centipawns
// Adjust contempt based on current bestValue (dynamic contempt)
- int sign = (bestValue > 0) - (bestValue < 0);
- ct += bestValue > 500 ? 70 :
- bestValue < -500 ? -70 :
- bestValue / 10 + sign * int(std::round(3.22 * log(1 + abs(bestValue))));
+ ct += int(std::round(48 * atan(float(bestValue) / 128)));
Eval::Contempt = (us == WHITE ? make_score(ct, ct / 2)
: -make_score(ct, ct / 2));