Due to lack of time, and that mainly due to lack of non-essential items like food and sleep, I can only supply a well-annotated game and the endgame is a challenging and fun one.
The opening is an English and here it is:
GM Jonathan Speelman-GM Yasser Seirawan
Candidates Match, Game #3
St. John, Canada, 1988
[John Nunn, “Candidates’ Matches”, BCM March 1988]
1.Nf3 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3 6.Qxc3 b6 7.g3 (An innocuous choice. The most dangerous line is 7.b3, with e3 and Be2 to follow.) 7…Bb7 8.Bg2 d5 9.cxd5 exd5 (This could be an important novelty, since White cannot gain the advantage and could easily drift into an inferior position.) 10.O-O (10.d3 d4 11.Qc2 a5 12.Bg5 c5 reaches a position in which White’s backward e-pawn is the most important feature.) 10…Re8 11.Re1? [This is weak because f2 becomes a tactical weakness. 11.e3 is much better when 11…c5 12.d4 (12.b4 d4 is fine for Black) Nc6 13.dxe5 Ne4 14.Qc2 bxc5 is similar to the game, except White need not to worry about f2.] 11…c5 12.d4 (12.d3 d4 with a backward pawn and 12.b4 d4 followed by by 13…d3 are good for Black.) 12…Ne4 13.Qc2 Nc6 14.dxc5 bxc5 15.b3 Qb6?! [Black attempts to exploit 11.Re1? by preventing 16.Bb2 on account of 16…c4 , but a more direct method would have been 15…Nd4! 16.Nxd4 (16.Qd3 Qf6 is no better.) 16…cxd4 17.Bb2 Qf6 followed by …Rac8 and …Nc3 with a clear advantage for Black.] 16.e3 Rab8 17.Rb1
[Not a serious error, but the start of a dubious plan. The simplest line was 17.Nd2!
(1) 17…Ne5 18.Bb2 Nxd2 19.Qxd2 d4 (19…Qxb3 20.Bxe5 Rxe5 21.Rab1 followed by Bxd5 with an edge for White) 20.exd4 Bxg2 21.dxe5 Ba8 22.Re3 with an unclear position.
(2) 17…Ba8 18.Bxe4! (The point that Spleeman had missed; it looks wrong to give up the white-square bishop, but Black has no way of exploiting the weakened kingside.)]
17…Ba8 18.Bd2? [But now White goes really wrong. This was the last chance to play 18.Nd2! and after 18…Ne5 (18…Qa5 19.Bxe4! dxe4 20.Bb2 is similar to line 1 above) 19.Bb2 Nxd2 20.Qxd2 Qxb3 21.Bxe5 Qxb1 22.Bxb8 Qxb8 23.Bxd5 with just an edge for Black.] 18…a5! (This leaves White with few constructive moves, while Black can still improve his position.) 19.Red1 d4 20.Re1 [Mission accomplished! 20.exd4 Nxd4 21.Nxd4 cxd4 (threat …d3) 22.Re1 Ng5! is very good for Black.] 20…Nxd2 21.Qxd2 a4?! (Tempting, but not the best. 21…c4 22.exd4 Rxe1+ 23.Qxe1 cxb3 24.d5 Na7 25.Ne5 is also far from clear, but Black should have prepared the simple line 21…dxe3 22.Rxe3 Rxe3 23.Qxe3 Nd4 when White’s tactics fail, for example 24.Ne5 Bxg2 25.Nd7 Qd8 26.Nxb8 Ba8 or 24.Re1 h6 25.Ne5 Bxg2 26.Nd7 Qd6 27.Nxb8 Bb7 and Black wins in both cases. Therefore, White would have to swap on d4, but this gives Black a slight advantage in the queen and rook ending.) 22.exd4 Rxe1+ 23.Qxe1? (This move justifies Black play. 23.Rxe1 axb3 24.Qe3 attacks e8 and c5, with a completely unclear position.) 23…axb3 (White is in a desperate situation and seizes the only available chance.) 24.d5 Nd4 25.Nxd4 cxd4 26.Qe7? [26.Qb4! is the only move to stay in the game. 26…Qxb4 27.axb4 Rxb4 28.d6 Bxg2 29.d7 Rb8 30.Rxb3 Rd8 31.Kxg2 f5 (31…Kf8 32.Kf3 Rxd7 33.Ke4 regains the pawn) 32.Rb7 Kf7 33.Kf3 Ke6 34.Ke2 leads to a draw, so Black’s best line is 26…Qa7! 27.Qc4 Qxa3 28.Qxd4 b2 29.Be4 Qa2, although this only gives him a slightly better position.] 26…h6 (26…g6 is also reasonable, but there is no reason to criticise Black’s play yet.) 27.d6 Bxg2 28.Kxg2 Qc6+ 29.Kh3 [29.Kg1 looks bad, but after 29…b2 30.d7 the obvious methods do not work, for example 30…Qc1+ 31.Qe1 Qxe1+ 32.Rxe1 Kf8 (32…b1=Q 33.d8=Q+) 33.Kg2 d3 34.Kf3 d2 35.Rb1 Ke7 36.Ke2 and White defends. However, 30…Kh7! is very strong, with the deadly threat of 31…Qc1+ 32.Qe1 Qxe1+ 33.Rxe1 b1=Q 34.b1=Q and White’s promotion is not check.]
29…Rb7! (The best move since 29…Re8 achieves nothing after 30.Qc7!) 30.Rc1 Qf3 [The only way to stay in the game. 30…Qxc1 31.Qxb7! (not 31.Qe8+ Kh7 32.Qe4+ f5 33.Qxb7 b2 34.d7 b1=Q 35.Qxb1 Qxb1 36.d8=Q Qf1+ and Black wins) 31…Qf1+ 32.Kg4 Qe2+ 33.Kh3 Qe6+ 34.Kg2 Qxd6 35.Qxb3 is better for Black, but not a clear win, so Seirawan tries for more.] 31.Rc7 Rb8 32.d7 Kh7! (Seirawan plays very accurately, but these moves took a toll on his clock.) 33.Rc1 [Not 33.Qe8 Rxe8 34.dxe8=Q Qf5+ (34…b2? 35.Qb5) 35.Kg2 b2 36.Rxf7 Qd5+ and Black wins. The rook retreat looks like capitulation, but it sets Black the maximum problems.] 33…b2 34.Re1? [This should have lost instantly, but even the superior 34.Rf1 doesn’t last long after 34…Qf5+ 35.Kg2 Qd5+ 36.f3 (36.Kh3 d3 37.Qe8 Qe6+) 36…b1=Q 37.Rxb1 Rxb1 38.d8=Q Rb2+ 39.Kg1 Qxf3, mating.] 34…Qd5? (A poor move which makes the win much harder. 34…Qxf2! was the killer.) 35.Qe8 Qd6? (Black could have still won by 35…Qb5!, but by now the decision was going to be made by the clock.) 36.Rb1 Qb6?? (Seirawan plays for a win by inertia and as a result he loses. The best move was 36…Qe6+, heading for a draw.) 37.Qxf7 (Suddenly Black is in big trouble. His only chance is 37…Qg6, but the sudden reversal is too much for Black and he collapses.) 37…Qd8? 38.Qf5+ Kh8 39.Qe6 d3 40.Rxb2 1-0