Tuesday, 4 December 2007

Study 17 + Albino 4

Árpád Rusz
Problem Online
Special Prize

White wins

1.Be3 h2+! [After 1...Rxe3 2.dxe3 h2+ white can choose the order to capture the black pawns avoiding the stalemate: 3.Kxg2! h1Q+ 4.Kxh1+-; 1...Kd1 2.Qa4++-] 2.Kxh2 Rxe3! 3.Kxg2! [Of course not 3.dxe3? g1Q+ (3...g1R? 4.e4! Rg2+! 5.Kh3!+-) 4.Kxg1 stalemate] 3...Rc3! [3...Re4 4.Qd3 Rf4 5.Qg3+ Kd1 6.Qxf4 e1Q 7.d4+-; After 3...Ra3 white has an interesting queen manoeuvre: 4.Qb5! Kd1 5.Qb1+ Kxd2 6.Qb2+ Kd1 7.Qd4+ Ke1 8.Qb4+ Kd1 9.Qd6+ Kc2 10.Kf2+-] 4.Qd5!

mutual zugzwang

[4.dxc3? stalemate; The thematic try 4.Qd4? also stops 4...Ra3? using a queen manoeuvre and the WCCT-7 Theme 5.Qb2 Kd1 6.Qb1+ Kxd2 7.Qb2+ Kd1 8.Qd4+ Ke1 9.Qb4+ +- but there is another defence: 4...Rc8! 5.Kf3 Rf8+ 6.Ke3 Kf1! 7.Qc4 Re8+ 8.Kf3 Rf8+ 9.Ke3 Re8+ perpetual check] 4...Rc8 4...Ra3 5.Qb5! Ra8 6.Kf3 Ra3+ [6...Rf8+ 7.Ke3+-] 7.d3! Albino 7...Kf1 8.Qf5! e1Q 9.Qh3+ +- 5.Kf3 Rf8+ 6.Ke3 Kf1 (6...Re8+ 7.Kd3+-) 7.Qh1#

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