Gady Costeff – Unión Argentina de Problemistas de Ajedrez

Diag.7 Gady Costeff
1.p Israel- St.Peterburg match, 2000- Ganan
wKb5,Bb8,Rc2,f5,Pa7,d6,h6/bKh8,Nd2,Bb1,Ra8,d8,Ph7

Solucion:

1.Tfc5 [1.Tcc5? Axf5 2.Txf5 Tdxb8+ 3.axb8D+ Txb8+ 4.Rc6 Cc4 5.d7 Cb6; 1.Txd2? Axf5] 1…Ce4 [1…Axc2 2.Txc2 Cf3 3.Rb6 Cd4 a) 3…Ce5 4.Rb7 Txa7+ 5.Rxa7 Rg8 6.Ac7 Td7 7.Rb6 Rf7 8.Te2 Rf6 9.Rc5 Cg6 10.Rc6 Cf8 11.Tf2+ Re6 12.Txf8 Txd6+ 13.Rc5 Td5+ 14.Rc4 Th5 15.Td8 Rf5 16.Td6 Rg5 17.Ab6; b) 3…Tdxb8+ 4.axb8D+ Txb8+ 5.Rc7 Tg8 (5…Tf8 6.Tf2) 6.d7 Cd4 (6…Cg5 7.Te2 Cf7 8.Te8; 6…Ce5 7.d8D Txd8 8.Rxd8 Cf7+ 9.Re7 Cxh6 10.Tg2 Cf5+ 11.Rf6 Ce3 12.Te2 Cd5+ 13.Rf7 h6 14.Te5 Cf4 15.Te4) 7.Tc4 Ce6+ (7…Cf5 8.Tc6 Cd4 9.Tb6; 7…Cb5+ 8.Rc6 Ca7+ 9.Rb6 Td8 10.Te4 Cc8+ 11.Rc7) 8.Rd6 Cd8 9.Re7 Cb7 10.Tc8; 4.Tc4 Tdxb8+ a) 4…Cf5 5.d7 Cxh6 (5…Txa7 6.Axa7 Cd6 7.Tf4 Ta8 8.Rc6) 6.Ae5+ Rg8 7.Tc8 Cf7 8.Rb7 Txa7+ 9.Rxa7 Cxe5 (9…Rf8 10.Af6) 10.Txd8+ Rf7 11.Tf8+; b) 4…Ce6 5.Rb7 Txa7+ 6.Rxa7 Rg8 7.Ac7 Td7 8.Rb7 Tf7 9.Tg4+ Rf8 10.Rc8 Tf6 11.d7 Txh6 12.Tf4+ Rg7 13.Ae5+ Rg8 14.Ad6 Th1 15.Tf8+ Rg7 16.Te8; 5.axb8D+ Txb8+ 6.Rc7 Tg8 7.Txd4 Tg4 8.Td5 Tg5 9.Rc6; 1…Taxb8+ 2.axb8D Txb8+ 3.Ra6 Axc2 4.Txc2] 2.d7 [2.Tc8? Cxd6+ 3.Axd6 Tdxc8 4.Txc8+ Txc8 5.Ab8 Ae4] 2…Axc2 [2…Cxc5

3.Txc5 Taxb8+ (3…Aa2 4.Tc8 Tg8 5.Ae5#; 3…Rg8 4.Tc8 Rf7 5.Txd8 Re7 6.Rc6 Rxd8 7.Rd6 Txa7 8.Axa7) 4.axb8D Txb8+ 5.Ra5! (5.Ra6? Aa2 6.Tc8+ Ag8 7.d8A Ac4+) 5…Aa2 6.Tc8+ Ag8 7.d8A! Txc8 8.Af6#; 2…Taxb8+ 3.axb8D Txb8+ 4.Ra5!] 3.Txc2 Taxb8+ [3…Cd6+ 4.Rc6 Cc8 5.Rc7 Txd7+ (5…Cxa7 6.Rxd8 Txb8+ 7.Rc7) 6.Rxd7 Cxa7 7.Ae5+ Rg8 8.Tg2+ Rf8 9.Tg5 Cc8 10.Ad4 Ca7 11.Tg7 Td8+ 12.Rxd8 Cc6+ 13.Rd7 Cxd4 14.Txh7] 4.axb8D Txb8+ 5.Ra6! [5.Ra5? Cf6 6.Tc8+ Cg8 7.d8C Tb7! 8.Cxb7] 5…Cf6 [5…Cd6 6.Tc6] 6.Tc8+ Cg8 7.d8C! Txc8 8.Cf7#

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