Sunday, 26 January 2020

New Year Blues

Aberystwyth have been having a tough time this season, and our first match of the New Year, at home against Cardigan B on Tuesday 21st January, continued the trend. Not that this was apparent from the play on Board 1. Rudy van Kemenade and Tony Haigh hardly seemed to have sat down when they were shaking hands for the second time, as Tony dropped a piece due to a miscalculated exchange and resigned after only thirteen moves. Julie van Kemenade had a chance to put Aber further ahead in an Italian Game against Ben Brewer, but missed the winning tactic. The middle game position that followed looked awkward with a rook offside, and even after it was exchanged, Black had pressure in the ending, winning a pawn with a knight fork and leaving her with a long and ultimately fruitless defence. I tried a new and odd-looking Philidor system against Joshua Brewer, and it seemed to be working, winning a pawn. I then thought I saw a decisive tactic, but missed the obvious defence and agreed a draw in my disappointment, although it turns out I could have retained my advantage into the endgame. Board 4 saw yet another Greek gift sacrifice - they seem to have turned up regularly this season, and it's interesting how often subsequent analysis shows them to be unsound. In this case, Tom Gunn's bishop sac in a Colle System was declined by Awne Osinga and a complex game resulted in which Black made a sacrifice of his own for a kingside counter-attack. Tom couldn't find the only move to defend against this and resigned in a position where he was theoretically winning, though the game would still have been very hard. (Awne revealed afterwards that he thought Tom was offering a draw, not resigning!) A 2½-1½ win for Cardigan B was a disappointing result for Aber.

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1.d4 d6 2.e4 Nf6 2...Nd7 3.Nc3 c6 4.Nf3 Qc7 5.Be3 e5 6.d5 c5 Haigh-J Van Kemenade,Dyfed League 2019,0-1 3.Nc3 c6 4.Nf3 4.f4 Qa5 main, Pribyl line 4...Qa5 4...Bg4 4...g6 5.Bd3 2nd most frequent 5.Bd2 main, preferred by Wh in pm analysis 5...e5 6.0-0 Bg4 maintains the tension & now Wh scores 82% 7.dxe5 most frequent, but ceding symmetry of pawn structure gives Bl easy equality, with Wh only getting a 29% share 7.Be3 keeping the tension , & now Wh scores 82%. Strangely enough the Cloud Engines prefer Wh with a definite plus after both continuations. Human Bl players are content with either position 7...dxe5 8.h3 8.Bd2 4 Bl wins, 1 draw 8...Bh5 the pin is awkward , though varieties of Stockfish happily keep chasing the B regardless of the weakening of the K side that is entailed 9.Bd2 main, but Wh's Bs obstruct the only open file 9.g4 Bg6 10.Nh4 Nbd7 11.Qf3 Be7 11...Nc5 12.a3 0-0 13.g5 Nh5 14.Nf5 Qd8 15.Qg4 Nc5 16.Rd1 Qc7 17.Be3 Ne6 18.Ne2 Bc5 Pavlov-Rakhmangulov UKR ch tm Alushta 2003,0-1 9...Qc7 10.Qe2 10.Bg5 Nbd7 11.Be2 0-0-0 12.Nd2 Bg6 13.Bd3 Nc5 Szonyi-Nagy, Budapest FSM11,2011,0-1 10.Ne2 a drastic decision Bxf3 11.gxf3 Nh5 12.Qc1 Bd6 13.Ng3 Nf4 14.Kh2 g6 15.Rg1 Nd7 Cieselski-Ozog, POL ch tm 2002,1-0 10...Nbd7 10...Be7 11.Kh1 0-0 12.g4 Bg6 13.Rg1 Nbd7 14.Nh4 Nc5 15.Nf5 Ne6 16.Rg3 Nd4 Ramirez-Esplana,Peru ch U26,1997,0-1 11.Nd1 the Wh pieces now begin to get in each other.s way 11.a4 Be7 11...a5 12.Rfd1 Bc5 13.Bc4 0-0 14.Bg5 Bd4 15.g4 Bxc3 16.bxc3 Bg6 17.Nd2 h5 Berger-Rader,Niederbayernliga 2006,1-0 12.Kh1 0-0 13.g4 Bg6 14.Nh4 Nc5 15.Nf5 Rfd8 16.Bg5 Ne6 17.Bh4 Nf4 18.Qf3 Bxf5 19.exf5 N6d5 20.Bg3 Nxh3 Gaspar-Galego, POR ch 1994,0-1 11...Nc5 12.Bb4? loose pieces are always at risk 12.b4 pm analysis & both Komodo13 & Stockfish11 Ne6 13.c3 13.g4 Stockfish11 Bg6 13...Nxg4 14.hxg4 Bxg4 15.Qe3 Nf4 16.Re1 g5= 14.Nb2 Rd8 13...Rd8 13...a5 Stockfish11 14.Bc4 14.Nb2 Be7 15.g4 Bg6 16.Rfe1 0-0 17.Nc4 Nd7= Stockfish11 14...Bxf3! Stockfish11 14...Rxd2 15.Qxd2 Bxf3 16.gxf3 16.Bxe6 Bxd1 16...Nf4 gives Bl good practical chances 15.gxf3 Qd7 16.Bxe6 Qxe6 17.Kh2 Nh5 12.c3 Rd8 13.Bc2 considered by Bl, when Rxd2 13...Bxf3! 14.gxf3 Qd7 15.Be3 Qxh3-+ is a much simpler solution by Stockfish11 14.Qxd2 Bxf3 14...Ncxe4 15.Qd3 Bxf3 16.gxf3 Nc5= Stockfish11 15.gxf3 Ne6= gives chances 12...Nxd3 13.Bxf8 Nf4-+ 0–1
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WhiteEloWBlackEloBRes
Haigh,A1797Van Kemenade,R19430–1
Van Kemenade,J1691Brewer,B16410–1
Brewer,J1493Francis,M1689½–½
Gunn,T1422Osinga,A12970–1