1...f1Q
2.c6
Qf7+
3.Kd8!
[3.Kb8?
Ka5
4.c7
Kxb6
5.c8Q
Qa7#
] 3...Qf8+
[3...Ka5
4.c7!
Qf8+
(4...Kxb6
5.c8Q=
) 5.Kd7
Kxb6
6.c8Q
Qf5+
7.Kd8=
] 4.Kc7!
[4.Kd7?
Qg7+!
5.Kd8
Qd4+!
6.Kc7
Ka5!
7.Rb8
Ka6
8.Rb7
Qc5
9.Kd7
Qe5
10.Kc8
Qd6
11.Rc7
Qd5
12.Kb8
Qe5
13.Kc8
Qe8#
] 4...Qg7+!
main [4...Qe7+!
main 5.Kb8!
Ka5
6.c7
Kxb6
7.c8N+!
(7.c8Q?
Qa7#
) 7...Ka6
8.Nxe7=
] 5.Kb8
Ka5
6.Rb7
Qf8+
7.Ka7!!
Qc5+
8.Kb8
Qxc6
9.Ra7+
Kb6
10.Ra6+
Kxa6=