2016-09-19 - Stubbs, Oliver 1-0 Dring, Geoffrey
[Event "Clevedon B vs Downend E"] [Site "Clevedon Cricket Club"] [Date "2016.9.19"] [White "Stubbs, Oliver"] [Black "Dring, Geoffrey"] [Result "1-0"] 1.d4 d5 2.Bf4 {Oh, the London System, it seems Oli is trying out a new opening today!} 2...c5 3.c3 {Maintaining two centre pawns if black now takes on d4, 4.cxd4. If instead 3.dxc4 then black plays 3 e6, gaining the pawn back unless white wants to lose time trying to defend it.} 3...Qb6 {Hitting b2 and adding additional pressure to d4.} 4.Qb3 cxd4 5.Qxb6 axb6 {Doubling black's pawn but also giving his rook some play.} 6.cxd4 Nc6 {Hitting d4 and readying Nb4.} 7.e3 {Protecting d4 and allowing the light-squared bishop to come into play. Interesting is 7.Nc3 followed by 7... Nxd4 8.0-0-0, Ne6 9.Nxd5 Rxa2 10.Kb1.. If, in this line for black, 8.... Nc6 then 9.Nxd5 is +3.52 because black will lose the exchange after, 9...e5 10.Nc7+ Ke7 11.Nxa8 exf4 12.Nxb6.. Black cannot save the rook with say, 9... Rxa2 because of 10.Nc7#.} 7...Nb4 {Threatening Nc2+ and Rxa2.} 8.Bb5+ $2 {The computer considers 8.Na3 to be a better alternative (by 0.7!), preventing black from Nc2+ and Rxe2, although black could continue 8...Rxa3 9.bxa3 Nc2+. Is white now better? Probably.} 8...Bd7 9.Bxd7+ Kxd7 {This was played for two reasons, to stop black castling, and white's h rook is now slightly closer to play.} 10.Kd2 {Stopping Nc2+ and white's h rook is again slightly closer to play (but of course white can now not castle either). 10.Na3 isn't as good here because it leads to 10...Nd3+ which is now possible because the light squared bishops have been swapped off.} 10...Rxa2 11.Rxa2 Nxa2 {Winning white's a2 pawn.} 12.Nf3 {Developing the knight and semi-releasing white's rook.} 12...e6 {Trying to catch up in development by letting the bishop out.} 13.Ne5+ {To see what trouble can be caused and putting the knight on a better square.} 13...Ke8 {Semi-forced, black must protect his f pawn or his rook will be trapped and Ke7 just blocks in his bishop.} 14.Nc3 {Fully releasing white's rook.} 14...Bb4 $2 {Looks natural enough but proves to be quite a bad move after...} 15.Ra1 {If the black knight does not take on c3 it's trapped.} 15...Nxc3 {White can now throw in...} 16.Ra8+ {Which is a very useful check because the b7 pawn and then a8 rook should fall. After a future Rxb7 black cannot move his knight or he loses his rook, and if he tries to move to get his rook out along the h file, his knight is slain.} 16...Ke7 {Simply forced.} 17.bxc3 Ba5 $2 {This move puts black at -4.4 whereas if he had played Bd6 (which would continue 18.Nxf7 Kxf7 19.Bxd6 h5 20.Rb8) black would be -2.62 instead.} 18.Rb8 {Goodbye b7 pawn and hello +7.32 for white.} 18...f5 19.Rxb7+ {Black is lost. A better move here is 19. Bg5+ followed by 19... Nf6 20. Rxh8. Note black cannot now go Ne4+ to win the bishop because the knight is pinned.} 19...Kf6 $4 20.Rf7# {Mate is not at all forced. Better for black is 19...Kf8 20.Nf7, winning the rook, but not yet checkmate.} 1-0
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