mate suite for chess engines

[Uri Blass]

All these positions have a single solution based on chest.

4k3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 6
4k3/pp6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm d4 dm 7
4k3/p3p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7
4k3/4p1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7
4k3/5p1p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7
4k3/6pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7
4k3/pp5p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm d4 dm 7
4k3/p5pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7
4k3/1pp1p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/1p1pp3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/2p2pp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e3 dm 8
4k3/3ppp2/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/3pp1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/4ppp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e3 dm 8
4k3/pp2p1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/pp2p2p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/p2pp2p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/p3pp1p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/1pp3pp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
4k3/1p1pp2p/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8
1n2k3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 8

[amanjpro]

Just in time for me to add/test mate distance pruning

[Uri Blass]

You can add the following mate in 9
4k3/3pppp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 9

Note that I analyzed distance to mate of all positions when black has 4 pawns or less than it and I may give more positions with more than one solution.