KQRBvk

h#6

8/7Q/7k/8/7B/6R1/8/K7 b - - 0 1

1. Kxh7 Kb2 Kh6 Kc3 Kh5 Kd4 Kxh4 Ke5 Kh5 Kf6 Kh6 Rh3#

pure model ideal mirror switchback single-piece single-piece:black nocheck

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#6

5kQ1/5R2/8/8/6B1/8/8/1K6 b - - 0 1

1. Kxg8 Kc2 Kh8 Kd3 Kg8 Ke4 Kh8 Kf5 Kg8 Kg6 Kh8 Rf8#

pure mirror switchback single-piece single-piece:black nocheck

Note: the diagram has no legal last move, so it cannot arise in a game.

h#6

7k/7Q/6R1/8/8/8/B7/K7 b - - 0 1

1. Kxh7 Kb2 Kh8 Kc3 Kh7 Kd4 Kh8 Ke5 Kh7 Kf6 Kh8 Rh6#

pure model ideal mirror switchback single-piece single-piece:black pendulum nocheck

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#3

8/8/8/8/3B4/R2k4/2Q5/K7 b - - 0 1

Two solutions, with different first and last moves (2 starts, 2 ends).

1. Kxc2 Ka2 Kc1 Kb3 Kb1 Ra1#
2. Kxd4 Kb2 Kd5 Qf5+ Kc4 Ra4#

pure model ideal mirror single-piece single-piece:black

Note: the diagram has no legal last move, so it cannot arise in a game.

h#3

8/8/8/8/4R3/B1Qk4/8/K7 b - - 0 1

Two solutions, with different first and last moves (2 starts, 2 ends).

1. Kxc3 Kb1 Kd2 Bb4+ Kd1 Re1#
2. Kxe4 Qe1+ Kd3 Bb4 Kc2 Qb1#

switchback single-piece single-piece:black zilahi

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#3

8/8/8/8/4R3/2Qk3B/8/K7 b - - 0 1

Two solutions, with different first and last moves (2 starts, 2 ends).

1. Kxc3 Bg4 Kb3 Bd1+ Ka3 Ra4#
2. Kxe4 Qe1+ Kd3 Ka2 Kc2 Bf5#

mirror switchback single-piece single-piece:black

Note: the side to move is in check in the diagram; the solution begins with a capture.