Nº9 Dmitry Zilberstein

Draw

Dmitry Zilberstein (USA)

wKh7,Na7,b7,Bb3,Rh4,Pa4,c4,e3/bKf8,Ng8,Ba5,Re6,Pa6,b6,c6,d7,g4

1.c5!
1.Nxa5? g3!–+ 2.c5 (2.Rf4+ Nf6+ (2…Rf6!? 3.Rxf6+ Nxf6+ 4.Kg6 g2 5.Kxf6 g1Q–+) 3.Kg6 g2 4.Rxf6+ Rxf6+ 5.Kxf6 bxa5 (5…g1Q) ) 2…g2 (2…Nf6+ 3.Kg6 g2 Transposes) 3.Bxe6 Nf6+ 4.Kg6 g1Q+ 5.Kxf6 Qg7+ 6.Kf5 dxe6+–+
1.Bd1? Black has several winning plans 1…Be1 Best way to win is to threaten to build a mating net around white king while pushing theg-pawn 2.Rh1 g3! 3.Bf3 Re5 Threatens Rg5-Nf6-Rg8 checkmate 4.Rf1 Rg5 5.Bd5+ Bf2 6.Bxg8 Rg7+ 7.Kh8 Rxg8+ 8.Kh7 Rg7+ 9.Kh6 Rf7-+

1…Rxe3 Other moves lead to positions of dynamic equality
1…Rh6+ 2.Rxh6 Nxh6 3.Bd1= (3.Bc4=; 3.Bc2=)
1…Re7+ 2.Kg6 Be1 (2…Rg7+ 3.Kf5 g3 4.Rh1 g2 5.Rg1 Bd2 6.Ke4 Rg3 7.Kf4= (7.Bxg8=) ) 3.Rh1=

2.Nxa5
2.Bd1? Be1!–+ same idea as after 1.Bd1 3.Rh1 (3.Rxg4 Rh3+! 4.Kg6 Ne7+ 5.Kf6 (5.Kg5 Bd2+ 6.Rf4+ Bxf4+ 7.Kxf4 b5 8.axb5 axb5 9.Bg4 Ra3 10.Nxb5 cxb5 11.Bxd7 b4–+) 5…Rh5–+) 3…g3 4.Rf1+ Bf2–+
2.Bc4? Be1!–+ 3.Rh1 g3 4.Rf1+ Bf2–+
2.Bxg8? Rh3 3.Rxh3 gxh3 4.Nxa5 h2–+

2…bxa5 3.Bxg8 Rh3 4.Rxh3 gxh3 5.Nxc6! dxc6 6.Kh8! h2 7.Bh7! h1B
7…h1Q= stalemate with pin
7…h1N 8.Be4 Nf2 9.Bxc6=

8.Be4! Bxe4= stalemate