extern ScalingFunction<KRPPKRP> ScaleKRPPKRP, ScaleKRPKRPP; // KRPP vs KRP
extern ScalingFunction<KPsK> ScaleKPsK, ScaleKKPs; // King and pawns vs king
extern ScalingFunction<KBPKB> ScaleKBPKB, ScaleKBKBP; // KBP vs KB
extern ScalingFunction<KRPPKRP> ScaleKRPPKRP, ScaleKRPKRPP; // KRPP vs KRP
extern ScalingFunction<KPsK> ScaleKPsK, ScaleKKPs; // King and pawns vs king
extern ScalingFunction<KBPKB> ScaleKBPKB, ScaleKBKBP; // KBP vs KB