Nº14 JanTimman, Steffen Nielsen & Mario García

Win

Section B.1
.
JanTimman, Steffen Nielsen & Mario García (Netherlands-Denmark-Argentina)

wKg2,Bh1,Rd1,Pb4,c6/bKa7,Nb2,Pb3,c4,c7

1.Rg1!
Try : 1.Ra1+? Kb6 2.Kf2 c3 (ab) (2…Nd3+ 3.Ke3 Nxb4 4.Be4 Kc5 5.Ra5+ Kb6 6.Ra8 Kc5) 3.Ke2 Kb5 (ba) 4.Bd5 (4.Rg1 Kxb4 5.Bd5 Na4=) 4…Kxb4 5.Rh1 Na4! 6.Bg8 (6.Rh4+ Ka3 7.Bg8 c2 8.Kd2 Nc3!=) 6…c2 7.Kd2 Nc3! 8.Bh7 (8.Rh4+ Ka3=) 8…Na2!=
or 1.Rf1? c3! (1…Nd3? 2.Kf3! see solution) 2.Kf2 c2! 3.Ke3 Nd1+ 4.Kd2 b2 5.Kxc2 Ne3+=

1…Nd3
Main: 1…Nd1! 2.Rxd1 c3 3.Kf2! according to the study of S. Nielsen in ChessStar 2019 (g2-b6) 3…c2 (3…b2 4.Be4+-) 4.Ra1+ Kb6 (4…Kb8 5.Be4 b2 6.Ra8+! Kxa8 7.Bxc2+-) 5.Be4 b2 6.Ra7! (a ensay in this line : 6.Ra6+? Kxa6 7.Bxc2 Kb5 8.Ke3 Kxc6 9.Kd4 Kb5 10.Kc3 c5 11.Bd3+ Kb6 12.b5 b1Q 13.Bxb1 Kxb5=) 6…Kxa7 (6…b1Q 7.Rb7+ Ka6 8.Bd3#; or 6…c1Q 7.Rb7+ Ka6 8.Bd3+ Qc4 9.Bxc4#) 7.Bxc2 Kb6 8.Be4 b1Q 9.Bxb1 Kxc6 10.Bd3!+-

2.Kf3! Nxb4 3.Ke3 /e4 3…c3 4.Kd4! Na2
4…c2 5.Kc3 Na2+ 6.Kb2+-

5.Bd5! c2
5…b2 6.Be4+-

6.Bxb3 c1Q 7.Rxc1 Nxc1 8.Bc4! domination 8…Kb6
8…Kb8 9.Ke5 Ka7 10.Ke6 Kb6 11.Kd7+-

9.Kd5! Ka5
9…Ka7 10.Ke6 Kb6 11.Kd7 Kc5 12.Kxc7+-

10.Ke6!
10.Kc5? Ka4=

10…Kb4 11.Kd7! Kxc4 12.Kxc7 with :

a) 12…Nb3 13.Kb6!
13.Kd6? Nd4 14.c7 Nb5+!=

13…Nc5 14.c7+-

b) 12…Nd3 13.Kd6!
13.Kb7? Nc5+=

13…Nc5 14.c7+-
In two sub-lines ZZ