KQRPvk

h#6

7k/7Q/6R1/8/8/8/5P2/K7 b - - 0 1

1. Kxh7 f4 Kh8 f5 Kh7 f6 Kh8 f7 Kh7 Rg7+ Kh8 f8=Q#

promotion excelsior excelsior:white switchback single-piece single-piece:black phoenix pendulum

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

h#6

K7/8/8/8/8/8/5RP1/5kQ1 b - - 0 1

1. Kxg1 g4 Kh1 g5 Kg1 g6 Kh1 g7 Kg1 g8=Q+ Kh1 Qg2#

pure model promotion excelsior excelsior:white switchback closed-walk single-piece single-piece:white single-piece:black phoenix

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

h#6

K7/8/8/8/8/8/P3Q3/6kR b - - 0 1

1. Kxh1 Kb7 Kg1 Kc6 Kh1 Kd5 Kg1 Ke4 Kh1 Kf3 Kg1 Qg2#

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#4

8/4R3/3k4/3Q4/8/8/KP6/8 b - - 0 1

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

1. Kxd5 Kb1 Kc4 Kc1 Kb3 Re3+ Ka2 Ra3#
2. Kxe7 Qf7+ Kd6 b4 Kc6 Kb3 Kb5 Qb7#

pure model ideal 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#4

8/8/6Q1/6Pk/7R/K7/8/8 b - - 0 1

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

1. Kxh4 Qe6 Kh5 g6 Kh6 g7+ Kh7 g8=Q#
2. Kxg6 Kb4 Kf7 Kc5 Ke8 Kd6 Kd8 Rh8#

pure model mirror promotion switchback single-piece single-piece:black

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

h#4

8/8/K7/7R/3P2k1/6Q1/8/8 b - - 0 1

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

1. Kxg3 Kb5 Kf2 Kc4 Ke1 Kd3 Kd1 Rh1#
2. Kxh5 Qh4+ Kg6 d5 Kf7 d6 Ke8 Qe7#

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

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