KPvkp
4 pieces.
- h#14.5
- longest mate
- h#8.5
- deepest unique
- 2
- positions at that depth
- h#10
- deepest dual
- h#6
- deepest strict dual
- 7,435,862
- positions with a helpmate
- 84,344
- with a unique solution
- 4,161,024
- cells in the plane
- 4,113,850 bytes
- on disk
Deepest unique problems
Only one distinct idea exists at this depth: 2 positions share a solution.
Deepest dual problems
Deepest dual with different first and last moves: h#6. The deepest dual overall is h#10, where the two solutions share a first or a last move.
Only 2 distinct ideas exist at this depth.
h#6
8/2K1p3/8/8/8/8/5Pk1/8 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kf1 f4 Ke2 f5 Kd3 f6 Kc4 fxe7 Kb5 e8=Q+ Ka6 Qa4#
- Kf3 Kb6 Ke4 f4 Kd5 f5 Kd6 f6 Kd7 fxe7 Kc8 e8=Q#
pure model ideal mirror promotion excelsior excelsior:white single-piece single-piece:white single-piece:black
h#6
1K6/8/2k5/8/8/8/1P4p1/8 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- g1=B b4 Bh2+ Ka7 Kc7 Ka6 Kb8 b5 Ka8 b6 Bb8 b7#
- g1=R b4 Ra1 b5+ Kc5 b6 Ra6 b7 Kb6 Kc8 Ka7 b8=Q#
pure model ideal promotion underpromotion excelsior excelsior:white self-block nocapture umnov