Nº8 Oleg Pervakov

Win

Oleg Pervakov (Russia)

wKf4,Nb7,Bf8,Pf7/bKa4,Rb5,Pb3,g4,g7

1.Ba3!
Logical try 1.Bxg7? b2 2.Bxb2 Rxb2 3.Kg3 Rb3+ 4.Kxg4 Rb4+ 5.Kg3 Rb3+ 6.Kf2 Rb2+ 7.Ke3 Rb3+ 8.Ke4 Rb4+ 9.Ke5 Rb5+ 10.Ke6 Rb6+ 11.Nd6 Rb8 12.Ne8 Rb6+ 13.Ke5 Rb5+ 14.Ke4 Rb4+ 15.Ke3 Rb3+ 16.Kf2 Rb2+ 17.Kg3 Rb3+ 18.Kg4 Rb4+ 19.Kg5 Rb5+ 20.Kg6 Rb6+ 21.Nf6 (21.Kg7 Rb7=) 21…Rb8 22.Ne8 Rb6+= Positional draw;
1.Nc5+? Rxc5 2.Bxc5 b2 3.f8Q b1Q 4.Qa8+ Kb3=

1…b2
1…Kxa3 2.f8Q+ Rb4+ 3.Ke5 b2 4.Nd6! b1Q 5.Nc4+ Ka4 6.Qa8++-
1…g6 2.f8Q Rf5+ 3.Qxf5 gxf5 4.Bb2+-

2.Bxb2 Rxb2 3.Kg3! Rb3+ 4.Kxg4 Rb4+ 5.Kg3!
5.Kf3? g5!=
Logical try 5.Kg5? Rb5+ 6.Kg6? Rb6+ 7.Kh7 (7.Kxg7 Rxb7=) 7…Rf6!=

5…Rb3+ 6.Kf2 Rb2+!
6…Rb6 7.Nc5+! Ka5 8.Nd7+-

7.Ke3 Rb3+ 8.Ke4 Rb4+ 9.Ke5 Rb5+ 10.Ke6 Rb6+ 11.Nd6! Rb8 12.Ne8 Rb6+ 13.Ke5 (d5) 13…Rb5+ 14.Ke4 Rb4+ 15.Ke3!
15.Kf3? g5!=

15…Rb3+ 16.Kf2 Rb2+ 17.Kg3 Rb3+ 18.Kg4 Rb4+ 19.Kg5 Rb5+ 20.Kg6 Rb6+ 21.Kh7!+-

New ideas in Troitzky’s mechanism (Bohemia, 1911 and Bohemia, 1912)