(4178) Paragua,Mark (2522) - Debashis,D (2389) [D45]
10th Parsvnath Open New Delhi IND (9.4), 21.01.2012

1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 Bd6 7.g4 h6 8.h3 e5 9.Bd2 0-0 10.g5 exd4 11.exd4 Re8+ 12.Be2 hxg5 13.Nxg5 dxc4 14.0-0-0 Nb6 15.Rhg1 Be6 16.Bh5 Qd7 17.Nce4 Nxe4 18.Qxe4 Bf5 19.Qh4 Re7 20.Nh7 Bxh7 21.Rxg7+ Kxg7 22.Bh6+ Kxh6 23.Bxf7+
[Kasparov points out that the star tactic could arise here too. White could have tried 23.Rg1 , sealing off the king's escape routes, and now 23...Qg4!! saves the day. White can take the queen any of four different ways - one of which is a discovered check that enables a second discovered check on the next move - but Black is always at least equal and usually winning. 24.Bxg4+ Forced! (24.hxg4? doesn't make any sense for White, as Black kills the attack and enjoys a material advantage and a better position after 24...Bf4+ 25.Kd1 Bg5-+ ; 24.Qxg4? fails to 24...Rg8 , winning big material. White can't afford to surrender the rook on g1, but 25.Qd1 (25.Qxg8 Bxg8 26.Rxg8 Kxh5-+ ) 25...Bf4+ surrenders everything!; 24.Rxg4? Re1+ 25.Kd2 Bb4# is the worst recapture of all.; 24.Qf6+? allows another showy move: 24...Qg6! , but again White is lost. 25.Bxg6 Bxg6 26.Qxd6 Rae8-+ Black enjoys both a material and a positional advantage.) 24...Kg7 and now White can keep the balance - but nothing more - with 25.Bf5+ (or 25.Bh5+) 25...Bg6 26.Bxg6 fxg6 27.Qg4 Kh8 28.Qh4+ (28.Qxg6 also holds, though it's more complicated and it's ultimately White doing the grovelling: 28...Bf4+ 29.Kd1 Rf8 30.Rg4 Rh7 31.Rxf4 Rxf4 32.Qe8+ Kg7 33.Qe5+ Rf6 34.Qe7+ Kg6 35.Qe4+ etc.) 28...Kg7 29.Qg4= ]

23...Kg7 24.Rg1+ Kf8?
This allows a forced mate. [As Kasparov notes, Black missed a fantastic defensive idea here: 24...Qg4!! The main point is clearance - the Black king needs access to d7 to survive. 25.Rxg4+ (25.Qxg4+? Kxf7 26.Qh5+ Ke6 27.Re1+ and here Black's king scampers to safety: 27...Kd7 28.Rxe7+ Bxe7 29.Qxh7 Rf8 gives Black a meaningful tempo-up version of the main line with 25.Rxg4+. White still has some chances to survive by running the h-pawn, but he's in trouble. 30.h4 Nd5 31.h5 Rxf2 32.h6 Nb4 33.a3 Nd3+ 34.Kb1 Rxb2+ 35.Ka1 Rf2-/+ ; 25.hxg4?? is just senseless: 25...Bf4+ 26.Kd1 Rxf7-+ ) 25...Kxf7 26.Qxh7+ Ke6 27.Re4+ Kd7 28.Rxe7+ Bxe7 gives White an extra tempo compared to the 25.Qxg4 variation, and that may be enough to keep the balance: 29.h4 Nd5 30.h5 Rf8 31.h6 and the speedy pawn *may* be enough to hold the balance. Regardless, it's White who must fight for survival now, not Black.]

25.Qh6+ Kxf7 26.Qxh7+ Ke6 27.Qe4+ Be5 28.Qxe5+ Kf7 29.Qh5+
[29.Qf4+ was the shortest route: 29...Ke6 (29...Ke8 30.Rg8# ) 30.Re1+ Kd5 31.Re5+ Kd6 32.Rf5+ Ke6 33.Qe5# ]

29...Kf8 30.Qh8+ Kf7 31.Qh7+ Ke6 32.Qe4+ Kd6 33.Qf4+ Kd5 34.Rg5+ Ke6 35.Qe5+
[Or again the pattern from the 29.Qf4+ line: 35.Re5+ Kd6 36.Rf5+ Ke6 37.Qe5# ]

35...Kf7 36.Qg7+
[36.Qg7+ Ke6 (36...Ke8 37.Qg8# ) 37.Qg6# ] 1-0