Reykjavik riddle

In this position Black played 17...Rc8 attacking the Qc3. This gives him the advantage... but only because his king hasn't moved yet! Otherwise White's reply from the game (no queen move!) would completely turn the tables.
Can you guess White's and Black's 18th move?
Solution
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f4 Be7 10.Nf3 b5 11.e5 11.Bxf6 gxf6 11...Bxf6!? 12.Qxd6 Be7∞ 12.Bd3 Qa5 13.Kb1 b4 14.Ne2 Qc5 15.f5 a5 16.Nf4 a4 17.Rc1 Rb8 18.c3 b3 19.a3 Ne5 20.Rhf1 Nc4 21.Bxc4 Qxc4 22.Rce1 Kd8 23.Ka1 Rb5 24.Nd4 Ra5 25.Nd3 Kc7 26.Nb4 h5 27.g3 Re5 28.Nd3 Rb8 29.Qe2 Ra5 30.fxe6 fxe6 31.Rf2 e5 32.Nf5 Bxf5 33.Rxf5 d5 34.exd5 Qxd5 35.Nb4 Qd7 36.Rxh5 Bxb4 37.cxb4 Rd5 38.Rc1+ Kb7 39.Qe4 Rc8 40.Rb1 Kb6 41.Rh7 Rd4 42.Qg6 Qc6 43.Rf7 Rd6 44.Qh6 Qf3 45.Qh7 Qc6 46.Qh6 Qf3 47.Qh7 Qc6 11...b4 12.exf6 bxc3 13.Qxc3 gxf6 14.f5 d5 15.fxe6 fxe6 16.Be2 16.Nd4 Qa5 17.Qxa5 Nxa5 18.Bh4 e5 19.Nb3 Nxb3+ 20.axb3 Be6 21.Be2 0-0 22.Rhf1 a5 23.Bb5 Rac8 24.Bd3 Rc6 25.Bf5 Bxf5 26.Rxf5 Rfc8 27.Rd2 d4 28.Kd1 Rb8 29.g4 h6 30.Rdf2 Rbb6 31.Kd2 a4 32.bxa4 Rxb2 33.Kd3 Kg7 34.Rxe5 fxe5 35.Bxe7 Rc3+ 36.Ke4 d3 37.Bf6+ Kg8 38.Bxe5 Rb4+ 39.Kd5 Rxc2 40.Rf1 d2 41.Rd1 Rxg4 42.a5 Ra4 43.a6 Kh7 44.Bb8 Ra1 45.a7 Rxd1 46.a8Q Re1 16.Kb1 16...Nb4 17.Kb1 Rc8 18.Ne5 0-0! 18...Rxc3 19.Bh5+ Kf8 20.Bh6+ Kg8 21.Bf7# 18...fxe5 19.Bh5+ Kf8 20.Bh6+ Kg8 21.Qg3+ 18...fxg5 19.Bh5+ Kf8 20.Ng6+ hxg6 21.Qxh8+ Kf7 22.Qh7+ Kf6 23.Rde1! gxh5 24.Rhf1# 19.Qg3 fxg5 20.Rhf1 Rxc2 21.Bd3 Nxd3 22.Qxd3 Rxb2+ 23.Kxb2 Qb8+ 0–1
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Olafsson,T | 2230 | Thorhallsson,T | 2428 | 0–1 |
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Oliver Reeh in ChessBase Magazine
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