Peter Krug & Mario Garcia (Аustria-Argenina)
 
Win 7+10

b) d6-->f6

Solution Diag . A

1.Nc3! (the trial in twin b) Try Thematic: 1.Nd2?( the key in twin b) exf2 2.Ndf1 Rh6 3.e3+ Kd3 4.Bd5 Kc2!³   1...exf2 2.Nf1 Rh6 3.Bd5 Bg6 main 3...Bf5 4.Bh1!! (4.Ba2? Re6–+) 4...Re6 5.Nxb5#   4.Ba2 Bc2 5.e3+ Kd3 6.Bd5 h2 6...Re6 7.Bxe6 g3 8.Bf5#   7.Be4#

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Solution Diag . B

 

1.Nd2! (the trial in twin a) Try Thematic: 1.Nc3? (the key in twin a) exf2 2.Nf1 f5! (2...Bf5? 3.Ba2+-) 3.Bg6 (3.Be6 Rh5–+) 3...Be4 4.Nxb5+ Kd5 5.Bf7+ Kc6 6.Be8+ Kd5=   1...exf2 2.Ndf1 f5 3.Be6 Be4 4.Ba2 Bc2 5.e3+ Kd3 6.Be6 Rh5 7.Bd7! 7.Nxh5? Ke2 8.Nhg3+ Ke1 9.Bd7 Bd3 10.Bxb5 Bxf1 11.Nxf1 g3! 12.Nxg3 h2 13.e4 f1Q 14.Bxf1 Kf2=   7...Ba4 8.Nxh5 Ke2 9.Nhg3+-