h#6
8/8/7k/6R1/8/1p6/1r6/K7 b - - 0 1
- Kh7 Kxb2 Kh8 Kc3 b2 Kd4 b1=R Ke5 Rb8 Kf6 Rg8 Rh5#
set-play pure model ideal promotion underpromotion self-block phoenix nocheck umnov
KRvkrp
5 pieces.
- h#7.5
- longest mate
- h#6
- deepest unique
- 175
- positions at that depth
- h#6
- deepest dual
- h#6
- deepest strict dual
- 483,044,666
- positions with a helpmate
- 19,788,960
- with a unique solution
- 355,074,048
- cells in the plane
- 168,783,041 bytes
- on disk
Deepest unique problems
h#6
8/8/7k/8/8/8/p1r5/K6R b - - 0 1
- Kg5 Rb1 Kf4 Rb2 Ke3 Kxa2 Kd2 Kb3 Kc1 Ra2 Rd2 Ra1#
pure model ideal self-block nocheck
Note: the side to move is in check in the diagram.
h#6
8/8/2p3Rk/8/1r6/8/8/K7 b - - 0 1
- Kh5 Rh6+ Kg4 Ka2 Kf3 Ka3 Ke2 Kxb4 Kd1 Kc3 Kc1 Rh1#
pure model mirror single-piece single-piece:black umnov
Note: the side to move is in check in the diagram.
Deepest dual problems
Only one distinct idea exists at this depth: 2 positions share a solution.
h#6
K7/8/8/1r6/8/8/2p1Rk2/8 b - - 0 1
Two solutions, with different first and last moves (2 starts, 2 ends).
- Kf1 Ka7 Rg5 Kb6 Rg1 Kc5 c1=N Kd4 Nd3 Ke3 Ne1 Rf2#
- Kg1 Ka7 Rg5 Kb6 Rg2 Kc5 c1=Q+ Kd4 Qc7 Ke3 Qh2 Re1#
pure model ideal promotion underpromotion self-block nocapture
Note: the side to move is in check in the diagram.