h#8
7k/8/8/8/8/1b6/8/Kn2N3 b - - 0 1
- Kg7 Kxb1 Kf6 Kc1 Ke5 Kd2 Kd4 Ke2 Kc3 Ke3 Kb2 Kd2 Ka1 Kc1 Ba2 Nc2#
KNvkbn
5 pieces.
- h#10
- longest mate
- h#8
- deepest unique
- 5
- positions at that depth
- h#8
- deepest dual
- h#7
- deepest strict dual
- 175,860,097
- positions with a helpmate
- 847,095
- with a unique solution
- 121,110,528
- cells in the plane
- 73,637,031 bytes
- on disk
Deepest unique problems
h#8
7k/8/8/8/b7/n7/5N2/K7 b - - 0 1
- Kg7 Kb2 Kf6 Kc3 Ke5 Kb4 Kd4 Kxa4 Kc3 Ng4 Kb2 Ne3 Ka1 Kb3 Nb1 Nc2#
h#8
7k/8/8/8/8/2n5/5N2/Kb6 b - - 0 1
- Kg7 Kb2 Kf6 Kxc3 Ke5 Kd2 Kd4 Kd1 Kc3 Ng4 Kb2 Ne3 Ka1 Kc1 Ba2 Nc2#
Deepest dual problems
Deepest dual with different first and last moves: h#7. The deepest dual overall is h#8, where the two solutions share a first or a last move.
h#7
8/8/5k2/8/8/5N2/1n6/K4b2 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Bd3 Nd2 Ke5 Kxb2 Kd4 Ka3 Kc3 Ka4 Kb2 Kb4 Ka1 Ka3 Bb1 Nb3#
- Bc4 Ne1 Ke5 Kxb2 Kd4 Kc1 Kc3 Kd1 Kb2 Kd2 Ka1 Kc1 Ba2 Nc2#
h#7
8/8/5k2/8/8/5N2/4b3/K2n4 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Bd3 Nd2 Ke5 Ka2 Kd4 Ka3 Kc3 Ka4 Kb2 Kb4 Ka1 Ka3 Bb1 Nb3#
- Bc4 Ne1 Ke5 Kb1 Kd4 Kc1 Kc3 Kxd1 Kb2 Kd2 Ka1 Kc1 Ba2 Nc2#
h#7
8/8/5k2/8/n7/5N1b/8/K7 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Bf5 Nd2 Ke5 Ka2 Kd4 Ka3 Kc3 Kxa4 Kb2 Kb4 Ka1 Ka3 Bb1 Nb3#
- Be6 Ne1 Ke5 Kb1 Kd4 Kc1 Kc3 Kd1 Kb2 Kd2 Ka1 Kc1 Ba2 Nc2#