Win (5 + 6)

Marcin Banaszek,    3° Hon. Mention Szachy 1969    1.f6 (1.Kf4? Rxg7! 2.hxg7 Kxg7 3.Bxb7 a4! 4.Kg5 a3 5.f6+ Kf8 6.Bd5 c6 7.Ba2 d5 8.Kf5 Kf7 9.Ke5 Kf8=) 1...Rh3 (1...Rg1 2.Bf3 Re1+ 3.Kd3 Re5 4.Be4 Rh5 5.h7+ Rxh7 6.Bd5#) 2.Bf3 Rxh6 3.Kf5 c6 (3...Kh7 4.Ke6 ( 4.Bd5? Rg6 5.Bg8+ Kh6-+ ) 4...Kg8 5.Ke7+-) And now a natural continuation 4.Kg5? Rh3 5.Bh5 Kh7! 6.Bg6+ Kg8 7.Be8 Kh7! 8.Bg6+ Kg8 only leads to draw. 4.Bh5!! A surprising sacrifice! 4...a4! Black resigns from acceptance of sacrifice! (4...Rxh5+ 5.Kg6! Rf5 6.Kxf5 Kf7 7.Kg5 a4 8.Kh6+-) 5.Kg5 Rxh5+ 6.Kg6!! White resigns from acceptance of sacrifice! (6.Kxh5? Kh7-+) 6...Rf5! (6...Rg5+ 7.Kxg5 Kh7 8.Kf5 a3 9.Ke6 a2 10.Kf7+-) 7.Kxf5 Kf7 8.Kg5 a3 9.Kh6 a2 10.Kh7 a1Q 11.g8Q+ Kxf6 12.Qg7(h8)+ wins. Double sided resignation from immediate acceptance of sacrifice!