h#7
7k/7N/8/8/2n5/8/8/K4B2 b - - 0 1
- Kg7 Ng5 Kf6 Kb1 Ke5 Kc1 Kd4 Nf3+ Kc3 Ne1 Kb3 Nc2 Ka2 Bxc4#
KBNvkn
5 pieces.
- h#12
- longest mate
- h#7
- deepest unique
- 7
- positions at that depth
- h#7
- deepest dual
- h#6
- deepest strict dual
- 175,862,861
- positions with a helpmate
- 2,366,477
- with a unique solution
- 121,110,528
- cells in the plane
- 97,915,938 bytes
- on disk
Deepest unique problems
h#7
6Nk/8/8/8/8/3n4/8/K4B2 b - - 0 1
- Kg7 Ne7 Kf6 Ka2 Ke5 Ka3 Kd4 Nc6+ Kc3 Na5 Kc2 Nb3 Kb1 Bxd3#
h#7
7k/8/5N2/7B/3n4/8/8/K7 b - - 0 1
- Kg7 Kb2 Kf8 Kc3 Ke7 Kxd4 Kd8 Kc5 Kc8 Kb6 Kb8 Nd7+ Ka8 Bf3#
Deepest dual problems
Deepest dual with different first and last moves: h#6. The deepest dual overall is h#7, where the two solutions share a first or a last move.
Only one position exists at this depth.
h#6
8/8/7k/6n1/8/8/B7/KN6 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kh5 Kb2 Kg4 Kc3 Kf3 Nd2+ Ke2 Bb1 Kd1 Bc2+ Kc1 Nb3#
- Kg6 Kb2 Kf5 Ka3 Ke4 Nd2+ Kd3 Bc4+ Kc2 Nb3 Kb1 Bd3#