(1) Piacentini,C - Ahn,M [B79]
Belgium ch B (3), 1992



1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0 Ne5 11.Bb3 Rc8 12.h4 Nc4 13.Bxc4 Rxc4 14.g4 Qa5 15.Kb1 Rfc8 16.h5
Diagram

16...Rxc3
Black's standard counter-play in the Sicilian Dragon

17.bxc3 Bxg4 18.hxg6
[18.fxg4 Nxe4-/+ ]

18...Bxf3 19.gxh7+ Kh8
[19...Nxh7 20.Nxf3 ]

20.Bh6
[20.Nxf3 Nxe4-+ ]

20...Bxh6 21.Qxh6 Nxe4 22.Rdg1
[22.Rhg1! Nxc3+ 23.Kc1 Nxa2+ (23...Ne2+ 24.Nxe2 Rxc2+ 25.Kxc2 Qxa2+ 26.Kd3 Qa6+ 27.Ke3 Qxe2+ 28.Kf4 Qe4+ 29.Kg3 (29.Kg5 Qe3+-+ ) 29...Bxd1 30.Qf8+ Kxh7 31.Qxf7+ Kh6 32.Rxd1 ) 24.Kb2 Rxc2+ 25.Nxc2 Qc3+ 26.Kxa2 Qxc2+= ]

22...Nxc3+ 23.Kc1
[23.Ka1 Qxa2# ; 23.Kb2 Qxa2+ 24.Kc1 Qa3+ 25.Kd2 Ne4+ 26.Ke1 Qa1+ 27.Qc1 Qxc1# ]

23...Qa3+ 24.Kd2 Ne4+ 25.Ke1 Qc3+ 26.Kf1 Qa1+
[26...Qa1+ 27.Qc1 Qxc1# ] 0-1