Type 1: Mate by piece xy (Black)
Ma8 - Black checkmates with Rook a8
Mb8 - Black checkmates with Knight b8
Mc8 - Black checkmates with Bishop c8
Md8 - Black checkmates with Queen d8
Mf8 - Black checkmates with Bishop f8
Mg8 - Black checkmates with Knight g8
Mh8 - Black checkmates with Rook h8
Ma7 - Black checkmates with Pawn a7
Mb7 - Black checkmates with Pawn b7
Mc7 - Black checkmates with Pawn c7
Md7 - Black checkmates with Pawn d7
Me7 - Black checkmates with Pawn e7
Mf7 - Black checkmates with Pawn f7
Mg7 - Black checkmates with Pawn g7
Mh7 - Black checkmates with Pawn h7
