h#7
8/8/kQ6/8/2q5/8/2P5/K7 b - - 0 1
- Kxb6 Kb1 Qe2 c4 Ka5 c5 Kb4 c6 Kc3 c7 Kd2 c8=Q Kd1 Qc1#
promotion excelsior excelsior:white self-block phoenix nocheck umnov
Note: the side to move is in check in the diagram; the solution begins with a capture.
KQPvkq
5 pieces.
- h#9
- longest mate
- h#7
- deepest unique
- 521
- positions at that depth
- h#8
- deepest dual
- h#6
- deepest strict dual
- 404,343,693
- positions with a helpmate
- 24,011,758
- with a unique solution
- 355,074,048
- cells in the plane
- 324,165,278 bytes
- on disk
Deepest unique problems
h#7
8/8/6Qk/8/1q6/8/1P6/K7 b - - 0 1
- Kxg6 b3 Qd2 b4 Kf5 b5 Ke4 b6 Kd3 b7 Kc2 b8=Q Kc1 Qb1#
promotion excelsior excelsior:white self-block single-piece single-piece:white phoenix nocheck umnov
Note: the side to move is in check in the diagram; the solution begins with a capture.
h#7
8/6Qk/8/1q6/5P2/8/8/K7 b - - 0 1
- Kxg7 f5 Kf7 f6 Ke6 f7 Kd5 f8=Q Kc4 Qf3 Kb4 Ka2 Ka4 Qa3#
promotion single-piece single-piece:black phoenix nocheck umnov
Note: the side to move is in check in the diagram; the solution begins with a capture.
Chosen from the first 500 of 521 positions at this depth.
Deepest dual problems
Deepest dual with different first and last moves: h#6. The deepest dual overall is h#8, where the two solutions share a first or a last move.
h#6
8/K7/8/k7/Q7/8/5P2/q7 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kxa4 f4 Qe5 fxe5 Kb5 e6 Kc6 e7 Kd7 Kb6 Kc8 e8=Q#
- Qxa4 f4 Qe8 f5 Kb5 f6 Kc6 f7 Kd7 Kb6 Kc8 fxe8=Q#
pure model ideal mirror promotion excelsior excelsior:white phoenix nocheck
Note: the side to move is in check in the diagram; the solution begins with a capture.
h#6
8/1K6/8/1k6/1Qq5/8/6P1/8 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kxb4 g4 Kc5 g5 Kd6 g6 Qf7+ gxf7 Ke7 Kc6 Kd8 f8=Q#
- Qxb4 g4 Qf8 g5 Kc5 g6 Kd6 g7 Ke7 Kc6 Kd8 gxf8=Q#
pure model ideal mirror promotion excelsior excelsior:white phoenix
Note: the side to move is in check in the diagram; the solution begins with a capture.
h#6
8/K7/8/k7/Qq6/8/5P2/8 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kxa4 f4 Kb5 f5 Kc6 f6 Qe7+ fxe7 Kd7 Kb6 Kc8 e8=Q#
- Qxa4 f4 Qe8 f5 Kb5 f6 Kc6 f7 Kd7 Kb6 Kc8 fxe8=Q#
pure model ideal mirror promotion excelsior excelsior:white phoenix
Note: the side to move is in check in the diagram; the solution begins with a capture.