Nº27 Oleg Pervakov

Draw

Oleg Pervakov (Russia)

wKb5,Qe1,Rd7/bKb8,Qg2,Rf3,Pe2

1.Qb4! Creating the battery
Not 1.Rd8+? Kb7! 2.Qb1 (2.Qb4 e1Q!–+) 2…Kc7! (2…e1Q? 3.Qh7+!+-) 3.Rd5 Qg8! 4.Qc2+ Kb8–+

1…Rb3!
1…e1Q? 2.Qd6+!+-
1…Kc8 2.Rc7+ Kxc7 3.Qe7+=
1…Rf5+ 2.Kc4+ Kc8 3.Rc7+ Kxc7 4.Qe7+ Kb6 5.Qe3+!=

2.Qxb3 e1Q 3.Rf7!
3.Ka6+? Kc8–+
3.Rd5? Qe7–+

3…Qe8+! 4.Kb4!! zz Mutual zugzwang. Again battery K+Q did not play!
4.Ka6+? Kc8–+

With two lines Main

A) 4…Qge4+ 5.Kc5+! Kc8 6.Rc7+! Kxc7 7.Qb6+ Kd7 8.Qd6+ Kc8 9.Qc7+! Kxc7= Stalemate

B) 4…Qgc6 5.Qg3+!
5.Ka5+? Ka8–+

5…Ka8 6.Qa3+ Kb8 7.Qg3+ Kc8 8.Qh3+ Qee6 9.Qh8+ Qce8 10.Qc3+ Q6c6 11.Qh3+= Perpetual check

Or 4…Kc8 5.Qc3+ Qgc6 6.Qh3+=..
4…Qc8 5.Ka3+!=