1.Sd3 Kg4
1...Rd1 2.Kc4 Kg4 3.Kc3 Kg3 4.Re3 main
2.Kb4!!
2.Rg8+? Kh5!! 3.Rh8+ Kg6 (3...Kg5? 4.Re8=) 4.Se5+ Kg7-+;
2.Re4+? Kg3-+;
2.Kc4? e1Q 3.Sxe1 f2-+
2...Rd1 3.Kc3 Kg3 4.Re3!
4.Kc2? Kh2!!-+ see the try of main B after 8.Re6?* ... 12....Kh2!!
A) 4...Kg2 5.Kc2!
5.Sf4+? Kf2-+;
5.Se5? e1Q+-+ (5...e1B+? 6.Kc2 Rd2+ 7.Kc1 f2 8.Sf3=)
5...Ra1 6.Kd2!
6.Kc3? Ra2 (6...Ra3+? 7.Kd2 Kg3 main B (7...f2 8.Sf4+=) 8.Re5) 7.Se1+ Kf2-+
6...Ra2+ 7.Ke1! Kg3! 8.Sc1!
8.Re8? Ra1+ 9.Kd2 Rd1+-+
8...Ra1 9.Kd2
9.Rc3? Kg2-+
9...Kf2 10.Sd3+
10.Rxf3+? Kxf3 11.Sxe2 Ra2+-+
10...Kg3 11.Sc1! Switchback
11.Re5? Rd1+-+;
11.Kc2? Ra2+ 12.Kb3 (12.Kb1 Rd2-+; 12.Kc1 Kg2-+) 12...Rd2 13.Kc3 Rd1 14.Kc2 Kg2 15.Sf4+ Kf2-+
11...Kf2 12.Sd3+ perpetual check.
12.Sxe2? Ra2+-+; 12.Rxe2+ fxe2 13.Sxe2 Ra2+-+
B) 4...Ra1 5.Kd2!
5.Kb2? Ra8 6.Kc3 Ra2 7.Kb3 Rd2 8.Kc3 Rd1 9.Kc2 Kg2-+
5...Ra2+ 6.Ke1 Ra1+ (6...Kg2 7.Sf4+=) 7.Kd2 positional draw, or 7...Ra3 8.Re5!!
*8.Re6? Ra2+ 9.Ke1 Ra1+ 10.Kd2 Rd1+ 11.Kc2 Kh2!! 12.Re3 Kg2 13.Kc3 Kg1! 14.Rxf3 Rxd3+-+
8...Ra2+ 9.Ke3 e1Q+ 10.Sxe1 Re2+ 11.Kd4 Rxe5 (11...f2 12.Rxe2=) 12.Sxf3=
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