1.Qd8+! [try 1.Qe4!? g2! (not 1...Sg5? 2.Qb7! Rb5 3.Qc7+ Ka6 4.Qc6+ Rb6 5.Qa8+ Kb5 6.Qd5++- ) 2.b4+ Kb5 3.Qb7+ Ka4 (Kc4)=; try 1.Qg4!? Rd5+! (not 1...g2? 2.b4+ Kb5 3.Qxg2 Rc3 4.Qg4+- ) 2.Ke2 Sd4+= ; 1.Qe7!? Rd5+ 2.Kc1 g2= ] 1...Kb4 2.Qb8+! [ try 2.Qb6+!? Kc4 3.b3+ Kd5! (not ...Kd4? selfpin 4.b4+- ) 4.Qb7+ (4.b4 Rc3!= ) 4...Rc6 selfpin 5.Qb5+ unpin 5...Rc5 selfpin 6.Qb7+ Rc6 selfpin - positional draw, or 7.Qf7+ (7.Qb5+ unpin 7...Rc5 8.Qd7+ unpin 8...Ke5 draw; 7.Qd7+ unpin 7...Rd6 selfpin - draw) 7...Ke4= ] 2...Kc4 3.b3+ [3.Qf4+? Sd4 selfpin - draws.; 3.Qg8+? Rd5+ selfpin 4.Ke2 Sd4+ draws.] 3...Kd5! [3...Kd4 4.Qf4+ Kd5 5.Qxf3++- ] 4.Qg8+! [4.Qb7+!? and play is same as 2.Qb6!? line 4...Rc6 5.Qb5+ etc - draws.] 4...Kd4 5.Qg4+! [Thematic try 5.Qxg3!? Ke3! zz - selfpin 6.Qh3 Rc6! zz 7.Qg3 Rc5 zz - positional draw, or 8.Qd6 Rf5! 9.Qe7+ (9.Qe6+ Kf4= ; 9.b4 Sd4! 10.Qe7+ Kd3= ) 9...Re5 10.Qd6 (10.Qa7+ Sd4 selfpin =) 10...Rf5 positional draw] 5...Ke3 6.Qxg3 zz - pin 6...Rc3 [6...Rf5 7.Kc2 Rg5 8.Qh3+- ; 6...Rg5 7.Qh3! Rg1+ 8.Kc2+- ] 7.Qb8! unpin [Try 7.Qg8!? Rd3+ 8.Kc1 Sd4 9.Qg5+ Ke4 10.Qg6+ Ke3 11.Qg3+ Ke4 positional draw (11...Ke2 12.Qe5+ Kf3 13.b4+- ) ] 7...Rd3+ 8.Kc1! [8.Kc2? Sd4+= ] 8...Rd5 [main 8...Sd4 9.Qe5+! (9.Qg3+ Ke4 10.Qg6+ Ke3 11.Qg5+ Ke4 positional draw) 9...Kf3 10.b4+- ] 9.Qg3 pin 9...Rg5 10.Qh3 wins.
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