[Event "BCC Championship"] [Site "BCC"] [Date "2016.05.19"] [Round "7"] [White "Patrick Cook"] [Black "Peter Lumsdon"] [Result "0-1"] [WhiteElo "1669"] [BlackElo "1786"] [ECO "E32"] [Opening "Nimzo-Indian: Classical, 4...O-O"] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 f5 8.e3 b6 9.Nf3 Bb7 10.Be2 d6 11.O-O Nd7 12.b4 g5!? {A great shot, and brave. Diverting from book. Chessbase, gives 9 alternatives, the most popular being Rf6, but not this. Deep Shredder also does not prefer it, giving the refutation as d5! But that move is very difficult to find over the board.(RJ)} 13.Bb2 g4 14.Nd2 Qg5 15.Nxe4 {Deep Shredder queries this, giving 15. d5!, with a .8 edge for White. (RJ).} Bxe4 16.Qc3 Rf6 17.f3 Rh6! {(BvR) This move deserves a question- rather than an exclamation-mark. The sacrifice is interesting but faulty (see the analysis engine).} 18.fxe4? {White misses Black's brilliant attack...(PC) No, it is the best move (BvR)} Rxh2!! {(BvR) deserves a question mark, because of 19.d5! The consequences are difficult to calculate, but black is lost at this point. (JW) As far as I can tell 19.d5 isn't a major concern. for one after 19...e5 I think whites only move is 20.Bxg4! and even then black has a perpetual with ...Qh4 21.Bh3 Rxh3. However I black can even play 19...Ne5 to continue playing for the win. I assume then you must have based your analysis on the microbase engine, however that engine isn't too strong and has a tendency to miscalculate complex lines quite severaly. (BvR) Yes, you are right, James: 19.d5 is nonsense, and 18...Rxh2 is worth an exclamation mark, as it gives black a draw after 19.Bxg4, Qh4; 20.Bh3, Rxh3; 21. gxh3 and perpetual check.} 19.Qe1 {(BvR) ? gives it away. (RJ) - Deep Shredder makes it even after 19. Bxg4 Qh4 20.Bh3 Rxh3 21.gh Qg3ch} g3 20.Rf3 {(BvR) and this is white's real mistake. 20. Rf4 would have held the 'fort'. Deep Shredder gives 20. Bg4! Qxg4 21. Rf4 Qg5 22 ef (RJ)} Rh1+!! 21.Kxh1 Qh4+ 22.Kg1 Qh2+ 23.Kf1 Qh1# {(BvR) Peter's daring attack paid off. Deservedly (I think), although the combination was incorrect} 0-1