Feldgrösse (Pixel): 42 52 64 74 84

[%evp 0,106,18,-17,7,-27,-51,-41,-31,-41,-32,-19,-15,-13,-18,-5,-5,-16,-29,-28,-21,-37,-22,-26,-24,-31,-19,-37,-19,-22,-27,-27,-8,-24,-38,-38,32,3,57,45,56,53,40,44,77,89,135,141,132,132,138,141,180,174,356,133,133,140,140,147,219,213,209,219,216,198,192,196,198,197,197,199,195,203,209,210,202,205,211,205,203,213,218,213,192,211,210,171,210,203,206,215,215,190,251,191,295,196,225,111,111,141,143,152,174,196,485,0,0] 1.c4 e5 2.g3 Nf6 3.Bg2 d5 4.cxd5 Nxd5 5.Nc3 Be6 [ 5...Nb6 main ]]
6.Nf3 Nc6 7.O-O Be7 8.d3 50% for Wh [ 8.d4 69% for Wh ]
8...O-O 9.Nxd5 [ 9.Bd2 Qd7 ( 9...Nb6 ); 9.a3 ]
9...Bxd5 10.a3 [ 10.Be3 f5 11.Rc1 3-2-3 ]
10...a5 [ 10...f5 2-3-8 ]]
11.Be3 a4= 1 draw, 4 Bl wins 12.Rc1 f6 13.Bc5 Ra5 [ 13...Kh8 14.Bxe7 Qxe7 15.Qc2 Rfd8 16.Rfe1 Rd7 17.Nd2 Cui-Sade, World Olympiad U16, 2018,1/2-1/2 ]
14.Bxe7 Qxe7 15.Nd2 Bxg2 16.Kxg2 Nd4 17.e3 but Wh's pieces get quite active [ 17.b4 axb3 18.Nxb3 Rxa3 19.Nxd4 exd4 20.Qc2 Rc3 21.Qb2 c6 22.Rxc3 dxc3 23.Qb3+ Kh8 24.Rc1 Qxe2 25.Qxb7 Qb2 26.Qe7 Ra8 27.Qe1= SF16 ]
17...Nf5 [ 17...Ne6 ]
18.Nc4 Ra6 19.Qf3+/- Nd6 20.Nxd6 cxd6 21.Qd5+ [ 21.Rc2 ]
21...Kh8 22.Rc2 [ 22.Rc4 ]
22...Rc6 23.Rxc6 bxc6 24.Qxc6+- Rb8 25.Rc1 Kg8 26.Qxa4 Rxb2 27.Qa8+ [ 27.Rc8+ Kf7 28.Qc4+ Kg6 29.Qg4+ ( 29.Rc7 Qf8 30.Qg4+ Kh6 31.e4+- ) 29...Kf7 30.Qh5+ Ke6 31.Re8+- SF16 ]
27...Kf7 28.Qd5+ Kg6 29.Rc6 [ 29.Qe4+ Kh6 30.Qh4+ Kg6 31.Qg4+ Kh6 ( 31...Kf7 32.Qh5+ ) 32.Rc8+- SF16- Engines are good at these long lines of calculation, humans much less so. ]
29...Qa7 30.Qe4+ Kh6 31.Rxd6 Qb7 [ 31...Qxa3 32.Qxe5+- ]
32.Qxb7 [ 32.Rc6 Rb5 ( 32...Rb6 33.Rxb6 Qxb6 34.a4+- ) 33.h4+- ]
32...Rxb7 33.d4 exd4 34.Rxd4 Ra7 35.a4 Kg6 36.e4 [ 36.Kf3 activating the K is usually best in an ending rather than unforced pawn moves ]
36...Kf7 37.f4 Ke6 38.Kf3 h5 39.h4 Ra5 40.f5+ this the tactical Engine move, which should work, but requires some exactfollowup ( eg the e awn is now not so easy to advance , and the a pawn is still not moving either. [ 40.Ke3 bringing the K across to support the a pawn is a more systematic approach. The Bl K is cut off, more pawns are kept on and Bl has no entry for his R. ]
40...Ke7 41.g4 [ 41.Ke3! SF16 ]
41...hxg4+ 42.Kxg4 Ra8 43.h5 [ 43.Kh5 Rh8+ 44.Kg6 Rxh4 45.Kxg7 Rg4+ 46.Kh6 Rg1 47.Rb4 Rh1+ 48.Kg6 Rg1+ 49.Kh5 Rh1+ 50.Kg4 Rg1+ 51.Kf3 Rf1+ 52.Ke3 after taking the g7 pawn, the K has to scramble his way back to the centre after all Ra1 53.Rb7+ Kf8 54.Ra7 Ra3+ 55.Kd4 Ra2 56.Kd5 Kg8 57.Ke6 Re2 58.Kxf6 Rxe4 59.a5 Ra4 60.a6 Ra1 61.Ra8+ Kh7 62.Ke7 Re1+ 63.Kf7 Re2 64.Re8 Ra2 65.Re6 Ra5 66.f6 Rc5 67.a7 Rc7+ 68.Re7 Rc8 69.Re8 Rc7+ 70.Ke6 Rc6+ 71.Kd7 Ra6 72.a8=Q ]
43...Ra5 44.h6 gxh6 45.Kh5 Ra8 46.Rb4 Kd6 47.Kxh6 Kc5 48.Rb5+ [ 48.Rb7 Rxa4 49.Re7 Ra8 50.Kg6 and Wh will get two connected passed pawns ]
48...Kd4 49.a5 [ 49.Kg6 Kxe4 50.a5 Ra6 51.Rb6 Rxa5 52.Rxf6 in order to save K & R vs K, R & p endings, the defending K needs to be in front of the pwn, not cut off behind or to one side. ]
49...Kxe4 50.Kg6 Ra6 51.Rb6 Rxa5 52.Rxf6 Ra7 53.Rf7 [ 53.Re6+ Kd5 54.Re1 is a simple win, but Wh has spent too much time sacrificing pawns to break in withthe K on the K side ]
53...Rxf7 time

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The chess pieces created by Colin M.L. Burnett. are distributed under the terms of GFDL & BSD & GPL.