Nº15 Oleg Pervakov

Win

Section B.1.

Oleg Pervakov (Russia)

wKa8,Na2,Pa5,b6/bKg1,Nc2,Rg4,Pg7

1.a6
1.b7? Ra4–+

1…Nd4
1…Rg6 2.Kb7! Ne3 3.Ka7! (3.a7? Nd5 4.a8Q Rxb6+ 5.Kc8 Rc6+! 6.Kb7 Rb6+ 7.Ka7 Ra6+! 8.Kxa6 Nc7+=) 3…Nd5 4.b7+-

2.Kb7 Nb3!
2…Nb5 3.Nc3! Nxc3 4.a7 Ra4 5.a8Q Rxa8 6.Kxa8 Nd5 7.b7 Nb6+ 8.Kb8! Nd7+ 9.Kc8+-

3.a7 Ra4 4.Nb4!
4.Nc3? Ra1! 5.Kc6 g5 6.Nb5 (6.Kb5 Nd4+ 7.Kc5 Ne6+ 8.Kb4 Nd8 9.Na4 Nc6+ 10.Kb5 Nd4+ 11.Kc5 Rxa4=) 6…Na5+ 7.Kc7 (7.Kd7 Nb7 8.Kc7 g4 9.Kxb7 g3=) 7…Nb3! 8.b7 Rxa7 9.Nxa7 Nc5 10.b8Q Na6+=

4…Nc5+
4…Na5+ 5.Kb8! Rxb4 6.a8Q Rxb6+ 7.Kc7+-

5.Kc6 Ra5 6.Na6!! Nxa6 7.b7 Nb4+ 8.Kb6 Rxa7 9.b8Q Ra3!
9…Rc7!? 10.Kb5! Nd5 11.Qd8+-
9…Rf7 10.Qg3+ Kf1 11.Qh3+ Kf2 12.Qh4++-

10.Qe5!
10.Kb5? Nc2! 11.Qb6+ Kf1! 12.Qc5 Rb3+ 13.Kc4 Rf3!=
10.Qd8? Nd3!=

10…Nc2! Switchback after c2-d4-b3-c5-a6-b4
10…Nd3 11.Qxg7+ Kf1 12.Qf8++-

11.Qg5+!
Logical try 11.Qxg7+? Kf1! 12.Qb2 Ne3! 13.Qxa3 Nc4+=
11.Qc5+? Ne3!=

11…Kh2!
11…Kf2 12.Qd2++-
11…Kf1 12.Qc1++-

12.Qh4+!
12.Qh5+? Rh3 13.Qe2+ Kg3! 14.Qxc2 g5=
12.Qd2+? Kh3! 13.Qxc2 g5=

12…Kg1
12…Kg2 13.Qe4+! and so on, +-

13.Qg4+ Kh2 14.Qe2+
14.Qf4+? Rg3=

14…Kg3
14…Kh3 15.Qh5+ Kg2 16.Qg6++-

15.Qe5+! Switchback after e5-g5-h4-g4-e2
15.Qxc2? g5=

15…Kg2 16.Qe4+! Kg3 17.Qg6+ Kh3 18.Qh7+ Kg3
18…Kg2 19.Qxc2+-

19.Qxg7+ In time 19…Kf3
19…Kf2 20.Qb2+- , pin Nc2

20.Qb2! Ne3 21.Qxa3 +-, pin Ne3