h#7
6Nk/7r/8/7N/8/8/8/K7 b - - 0 1
- Ra7+ Kb2 Kh7 Kc3 Kg6 Kd4 Kf7 Ke5 Ke8 Kf6 Ra8 Kg7 Rd8 Nhf6#
KNNvkr
5 pieces.
- h#10
- longest mate
- h#7
- deepest unique
- 1
- positions at that depth
- h#6.5
- deepest dual
- h#6
- deepest strict dual
- 83,873,181
- positions with a helpmate
- 1,329,017
- with a unique solution
- 121,110,528
- cells in the plane
- 47,778,535 bytes
- on disk
Deepest unique problems
Only one position exists at this depth.
Deepest dual problems
Deepest dual with different first and last moves: h#6. The deepest dual overall is h#6.5, where the two solutions share a first or a last move.
Only one position exists at this depth.
h#6
6Nk/7N/8/8/8/8/1r6/K7 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Rh2 Kb1 Rh1+ Kc2 Kg7 Kd3 Kg6 Ke4 Kh5 Kf5 Rh4 Nhf6#
- Rb8 Ka2 Ra8+ Kb3 Kg7 Kc4 Kf7 Kd5 Ke8 Ke6 Rd8 Ngf6#