KQNvkq

h#5.5

7N/7k/8/6Q1/8/8/1q6/K7 w - - 0 1

1. Kxb2 Kxh8 Kc3 Kh7 Kd4 Kh8 Ke5 Kh7 Kf6 Kh8 Qg7#

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

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

h#5.5

6Nk/4Q3/8/8/8/8/1q6/1K6 w - - 0 1

1. Kxb2 Kxg8 Kc3 Kh8 Kd4 Kg8 Ke5 Kh8 Kf6 Kg8 Qg7#

switchback single-piece single-piece:black kniest pendulum nocheck

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

h#5.5

7k/7N/8/6Q1/8/8/1q6/K7 w - - 0 1

1. Kxb2 Kxh7 Kc3 Kh8 Kd4 Kh7 Ke5 Kh8 Kf6 Kh7 Qg7#

switchback single-piece single-piece:black kniest pendulum nocheck

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

h#3.5

8/N7/8/8/8/8/2Q5/Kq2k3 w - - 0 1

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

1. Kxb1 Kf1 Nb5 Ke1 Qf2+ Kd1 Nc3#
2. Qxb1+ Ke2 Nc6 Kd2 Ne5 Kc3 Qb2#

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

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

h#3.5

8/8/N7/8/8/6k1/q3Q3/K7 w - - 0 1

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

1. Kxa2 Kf4 Qf2+ Ke4 Kb3 Kd3 Nc5#
2. Qxa2 Kf3 Kb2 Ke2 Kc3+ Kd1 Qd2#

mirror single-piece single-piece:black

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

h#3.5

N7/8/1Q6/5k2/8/8/8/K1q5 w - - 0 1

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

1. Ka2 Ke4 Nc7 Kd3 Ne6 Kc4 Qb3#
2. Qb1+ Ke6 Qxc1 Kd7 Qf4 Kc8 Qc7#

pure model single-piece single-piece:white single-piece:black

Note: the side to move is in check in the diagram.