Peter Krug &Mario García

Ganan

2.Premio Die Schwalbe 2017/18,

wKd2,Nd1,Rf8,Pc3/bKg1,Pb4,d7,g2,h3

1.Nf2!
Try I : 1.cxb4? Kh2 2.Rf2 (2.Rg8 g1Q=) 2…Kg3!= (2…Kh1? 3.Ke2 g1Q 4.Rf1 h2 5.Ne3+-) ; or 1.Ke2? Kh2!=

1…bxc3+ 2.Ke2 h2
2…Kh2 3.Nxh3 c2 4.Rc8 Kxh3 5.Kf2+-

3.Nh3+!
Try II : 3.Ng4? c2! 4.Rc8 h1Q 5.Rxc2 Qh6! 6.Nxh6 Kh1!=
or 3.Ra8? h1N! 4.Ng4 Ng3+ 5.Kf3 Nf1=

3…Kh1 4.Ra8
Try III : 4.Kf3? c2! (4…g1N+? 5.Kg3 Nxh3 6.Rf1+ Ng1 7.Rf2+-) 5.Rc8 g1N+! 6.Kg3 Ne2+!=

4…g1N+
4…g1Q 5.Nf2+ Kg2 6.Rg8# mate model

5.Kf2! compare with twin B
5.Kf1? Nxh3=

5…Nxh3+ 6.Kg3 d5! 7.Ra1+ Ng1 8.Ra2!
Try IV : 8.Rc1? d4 9.Rc2 Nh3! 10.Kxh3 Kg1 11.Kg3 Kf1 12.Rxh2 Ke1 13.Kf3 Kd1 14.Ke4 c2 15.Kd3 c1N+!=

8…Nh3! 9.Kxh3 Kg1 10.Kg3 h1N+
10…Kf1 11.Rxh2 Ke1 12.Kf3 /f4 12…Kd1 13.Ke3 d4+ (13…c2 14.Rh1#) 14.Kd3+-

11.Kf3 d4
11…Kf1 12.Ra1#

12.Rc2! Zugzwang 12…d3 13.Rxc3 d2
13…Nf2 14.Rc1+-;
13…Kh2 14.Rxd3 Ng3 15.Rd5 Kh3 16.Rg5+-

14.Rd3 Kf1 15.Rxd2+-