return make_score(mg_value(s) / i, eg_value(s) / i);
}
+/// Weight score v by score w trying to prevent overflow
+inline Score apply_weight(Score v, Score w) {
+ return make_score((int(mg_value(v)) * mg_value(w)) / 0x100,
+ (int(eg_value(v)) * eg_value(w)) / 0x100);
+}
+
#undef ENABLE_OPERATORS_ON
#undef ENABLE_SAFE_OPERATORS_ON
}
inline Square operator~(Square s) {
- return Square(s ^ 56);
+ return Square(s ^ 56); // Vertical flip SQ_A1 -> SQ_A8
}
inline Value mate_in(int ply) {
return Square((r << 3) | f);
}
-inline bool square_is_ok(Square s) {
+inline bool is_ok(Square s) {
return s >= SQ_A1 && s <= SQ_H8;
}
}
inline Square mirror(Square s) {
- return Square(s ^ 7);
+ return Square(s ^ 7); // Horizontal flip SQ_A1 -> SQ_H1
}
inline Square relative_square(Color c, Square s) {