h#5
8/8/8/6R1/7k/N4R2/8/K7 b - - 0 1
- Kxg5 Rb3 Kf4 Rb2 Ke3 Nc2+ Kd2 Ne3+ Kc1 Rc2#
single-piece single-piece:black umnov
Note: the solution begins with a capture.
KRRNvk
5 pieces.
- h#7
- longest mate
- h#5
- deepest unique
- 4
- positions at that depth
- h#5
- deepest dual
- h#3.5
- deepest strict dual
- 80,175,866
- positions with a helpmate
- 11,232,760
- with a unique solution
- 121,110,528
- cells in the plane
- 35,508,104 bytes
- on disk
Deepest unique problems
h#5
3k4/4R3/8/8/7N/2R5/8/1K6 b - - 0 1
- Kxe7 Kc2 Kf6 Kd3 Kg5 Ke4 Kxh4 Kf5 Kh5 Rh3#
pure model ideal mirror single-piece single-piece:black nocheck
Note: the solution begins with a capture.
h#5
3k4/4R3/2R5/8/8/8/8/NK6 b - - 0 1
- Kxe7 Rc2 Kd6 Rb2 Kc5 Nb3+ Kb4 Nc5+ Ka3 Rb3#
single-piece single-piece:black umnov
Note: the solution begins with a capture.
Deepest dual problems
Deepest dual with different first and last moves: h#3.5. The deepest dual overall is h#5, where the two solutions share a first or a last move.
Only one position exists at this depth.
h#3.5
8/8/8/2R5/3k4/4R3/1N6/K7 w - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kb1 Kxc5 Kc2 Kb4 Re4+ Ka3 Ra4#
- Ka2 Kxe3 Kb3 Kd2 Rd5+ Kc1 Rd1#