Nº21 Oleg Pervakov

Draw

Section A

Oleg Pervakov (Russia)

wKf6,Ng2/bKh6,Bg8,Pd7,g6

1.Nh4! Bh7 Main A (thematic) 2.Nf3! d5 3.Ke6!
3.Ke5? Bg8–+ zz 4.Kf6 Kh5! zz 5.Ng5 d4 6.Nf3 d3–+

3…Bg8+ 4.Ke5 zz 4…Kg7
4…g5 5.Kf5 Bh7+ 6.Kg4=

5.Ng5! zz
5.Nd4? Kh7! 6.Kf6 Kh6 7.Nf3 Kh5 8.Nd4 g5–+
5.Nh4? Kh7! 6.Kf6 d4–+

5…Bf7 6.Nf3! zz 6…Kh7 7.Ng5+!
7.Kf6? Bg8! zz 8.Ke5 Kh6 9.Kf6 Kh5!–+ zz

7…Kg7
7…Kg8 8.Kf6! d4 9.Nxf7 d3 10.Nh6+ Kh7 11.Ng4=

8.Nf3 Kh6 9.Kf6 Bg8
9…Be8 10.Nd4! Bd7 11.Ke5=

10.Ke5 Kh5 11.Kf6 zz. New fortress, based on mutual zugzwangs

Main B 1…g5 2.Nf5+ Kh5 3.Ng3+! Kh4!
3…Kg4 4.Ne4=

4.Nf5+ Kg4! 5.Nh6+ Kf4 6.Nxg8 g4
6…d5 7.Ne7 d4 8.Ng6+! Ke4 9.Ne5!)

7.Ne7 g3 8.Ng6+! Ke4 9.Nh4 d5 10.Kg5 d4 11.Kg4 g2! 12.Nf3!
12.Nxg2? d3–+

12…d3 13.Kg3 g1Q+ 14.Nxg1 d2 15.Nh3!
15.Ne2? Kd3–+

15…d1Q 16.Nf2+=