Nº17 Oleg Pervakov

Win

Oleg Pervakov (Russia)

wKe1,Nc7,e2,Bc8,Rh1,Pf4,g2,g6,g7,h3/bKh5,Qc2,Bb5,Pb2,e7,h4

1.0–0!
1.Bg4+? Kh6 2.g8Q b1Q+ 3.Kf2 Qc5+–+

1…Bc4!
1…b1Q 2.Bg4+ Kh6 3.g8Q Qxf1+ 4.Kh2+-
1…Qxg6 2.Bg4+ Kh6 3.g8Q Qxg8 4.Nxb5 Qb3 5.Nbc3+-

2.Be6!
Thematic try: 2.Ne6? b1Q 3.Rxb1 Qxb1+ 4.Kh2 Qxg6 5.g4+ hxg3+ 6.Nxg3+ Kh4 (the same 6…Kh6 7.Nf5+) 7.g8Q Qxg8 8.Nf5+ Kh5 9.Neg7+ Kg6 10.Nxe7+ Kxg7 11.Nxg8 Kxg8= bishops on the board!(11…Bxg8=)

2…b1Q 3.Rxb1
3.g8Q? Qxf1+ 4.Kh2 Qxg2+! 5.Kxg2 Qxe2+=

3…Qxb1+
3…Bxe6 4.Rb5++-

4.Kh2
4.Kf2? Qb6+–+

4…Bxe6 5.Nxe6 Qxg6
5…Qb8 6.N2d4 Kxg6 (6…Qg8 7.f5! Qb8+ 8.Kg1+-) 7.Nc6!+-

6.g4+! hxg3+ (en passant)
6…Kh6 7.g5+ Kh5 8.f5+-

7.Nxg3+ Kh6!
7…Kh4 8.g8Q! Qc2+ 9.Ne2! (9.Kg1? Qg2+! 10.Kxg2= stalemate) 9…Qxe2+ 10.Qg2 Qxe6 11.Qg5#

8.Nf5+! Kh5
8…Qxf5 9.g8Q Qxf4+ 10.Nxf4+- no stalemate

9.g8N!! Domination
9.g8Q? Qg2+ 10.Qxg2= stalemate
9.g8B? Qf6! 10.Ned4 e5=
9.Nfd4? Qf7! 10.f5 Kh4 11.Kg1 Qe8! 12.Nf8 (12.Nc6 Qxc6 13.g8Q Qc1+= perpetual check) 12…Qf7 13.Nde6 Kg3! 14.h4 Kg4! 15.h5 Kxh5 16.Ng6 Qxf5 17.Ngf4+ (17.Nef4+ Kg5!=) 17…Kh6! 18.g8Q Qb1+ 19.Kh2 Qh1+! 20.Kxh1= stalemate;
9.Ned4? e6! 10.Ng3+ Kh6=

9…Qxg8 10.Neg7+ Kg6 11.Nxe7+ Kxg7 12.Nxg8 Kxg8+-

No bishops, White wins. Valladao task with thematic try