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Update half_relative_ka.cpp

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JWmer
2020-11-20 15:49:02 +01:00
committed by nodchip
parent b0429237a8
commit 3975fc9c0d
1 changed files with 6 additions and 2 deletions
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8
src/nnue/features/half_relative_ka.cpp
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@@ -4,9 +4,13 @@
//Definition of input features HalfRelativeKA of NNUE evaluation function
namespace Eval::NNUE::Features {
// Orient a square according to perspective (flip rank for black)
// Orient a square according to perspective (rotate the board 180° for black)
// Important note for "halfka": this arch was designed with "flip" in mind
// although it still is untested which approach is better.
// this has to stay until we find a better arch that works with "flip".
// allows us to use current master net for gensfen (primarily needed for higher quality data)
inline Square orient(Color perspective, Square s) {
return Square(int(s) ^ (bool(perspective) * SQ_A8));
return Square(int(s) ^ (bool(perspective) * 63));
}
// Find the index of the feature quantity from the ball position and PieceSquare