I 1.Qd3+? Ke6[b] 2.Qd7[B]# But 1. ... Kc5[a]!
II 1.Qh1+? Kc5[a] 2.Qc6[A]# 1. ... Ke6[b] 2.Qe4[D]# But 1. ... Kc4 !
III1.Bb2z? Ke6[b] 2.Qf7[F]# 1. ... Ke4[c] 2.Qf3[C]# But 1. ... Kc5[a] !
IV1.Be8z? Kc5[a] 2.Qb5[E]# 1. ... Ke6[b] 2.Qf7[F]# But 1. ... Ke4[c] !
V 1.Be2z? Kc5[a] 2.Qf5[G]# 1. ... Ke4[c] 2.Qf3[C] But 1. ... Ke6[b] !
Solution:
1. a4z!
1. ... Kc5[a] 2.Qb5[E]# 1. ... Ke6[b] 2.Qf7[F]# 1. ... Ke4[c] 2.Qf3[C]#
Keywords:
Progressive deffence / changed mates (I-II-Sol.)
Cycle of 2-3 moves (III-IV-V)
Duel; King Y flight; Minskaya-1/ effect "bicolour";
Zagoruiko, distributed (B-G+AD+EF)
Effect "bicolour" complete: Kc5/Qb5 - Ke6/Qf7 - Ke4/Qf3
(To create a picture)
