Kenneth Holmes Braithwaite
The Problemist, 1983
Mate in 2
(b) wPf2->c4
(a) KEY: 1.Qc5!
(b) INTENTION: 1.Qf2? BUT: 1...Bxc4!
José Antonio Coello
Correction
Mate in 2
(b) wPf2-c4