1.f7+! [Thematic try 1.Rb8+!? Kf7! (1...Kh7? 2.Nxb3 f1Q+ 3.Kb2 Qe2+ 4.Ka3 dxc3 5.Rb6 Qe8 6.f7 Qxf7 7.Rb5= ) 2.Rb7+ Kxf6? 3.Rb6+ Kf5 4.Nxb3 and play leads to main line, but Black must play 2...Kg6! and White have no chance of rescue.] 1...Kg7 2.f8Q+ Kxf8 3.Rb8+ [3.Rxb3!? f1Q+ 4.Kb2 Qf2+ 5.Ka3 d3-+ ; 3.Nxb3!? f1Q+ 4.Nc1 dxc3 5.Rb3 Qe1-+ ] 3...Kf7 4.Rb7+ Kf6 5.Rb6+ Kf5! This strongest continuation of Black's play. Now it is possible to play 6.Nxb3 f1Q+ 7.Kb2 Qf2+ [7...d3 8.Rb5+ Kf6 (8...Kf4 9.Rb4+= ) 9.Rb6+ Kf7 10.Rb7+ Ke8 11.Rb8+ Kd7 12.Rb4= ] 8.Ka3 dxc3 [8...d3 9.Rb5+ Ke4 (9...Kf6 10.Rd5= ) 10.Rb4+ Ke3 11.Rd4 ] 9.Rb7! [9.Rb5+!? Ke4 10.Nc5+ Kd4 11.Ne6+ Kd3 12.Rd5+ Ke4 13.Rd4+ Qxd4 14.Nxd4 Kxd4-+ ] 9...Ke5 [9...Qb2+ 10.Kb4 (10.Ka4? Qg2!-+ ) 10...c2 11.Rc7= ] 10.Re7+ Kd5 [10...Kd6 11.Rh7! (11.Rg7? Qf6-+ ) 11...Qb2+ 12.Kb4= ] 11.Rd7+ Kc4 12.Rc7+ [12.Na5+!? Kc5 13.Nb3+ Kb5! 14.Rd5+ (14.Rb7+ Kc6! 15.Na5+ Kd5 16.Rd7+ ) 14...Kc4 15.Rc5+ (15.Rd4+ Qxd4-+ ) 15...Kd3 16.Rd5+ Ke4 17.Rc5 Qf8 18.Ka4 Kd3-+ ] 12...Kd3 13.Rd7+ [13.Nc1+!? Kd2 (13...Kc2? 14.Na2 Qf8+ 15.Nb4+ Kd2 16.Kb3= ) 14.Nb3+ Kc2 15.Rc4 Qa7+ 16.Ra4 Qb6-+ ] 13...Ke3 [13...Ke2 14.Nc1+ Ke1 (14...Kf1 15.Rd1+= ) 15.Nd3+= ] 14.Re7+ Kd3 15.Rd7+ Kc2 16.Ka2 zz 16...Qg2 17.Rd8! zz 17...Qh2 18.Rd5! zz [Thematic try 18.Rd7!? Qf2! zz 19.Rd5 Qa7+-+ ; 18.Rd4!? Qf2-+ ] 18...Qf2 19.Rd7 positional draw, or 19...Qf1 (Qb6) 20.Na1+ [20.Nd4+!? Kd2 21.Nb3+ Ke3 22.Re7+ Kd3 23.Rd7+ Ke4-+ ] 20...Kc1 21.Nb3+ Kc2 22.Na1+ positional draw.
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