Wednesday, 31 October 2018

Clean Sweep

Aberystwyth continued its good start to the season on against Steynton C on Monday 22 October at the Emlyn Cafe, Tanygroes. It is never a good idea to hang a piece against Rudy van Kemenade, as Colin Denham did on top board for Steynton in a Dutch Defence. Rudy temporarily gave back the piece but soon crashed through on the kingside. Another dubious strategy is to castle queenside in a Sicilian. Julie van Kemenade, playing White against Gwyn Evans had no trouble switching her attack to the other wing, weakened by the advance of the c-pawn, for a decisive victory. James Cook, back in the team after a longish break, played his trademark Caro-Kann, and used the key white-squared bishop to break up Ray Greenwood's kingside for a winning attack. Ian Finlay dominated the centre in a Tarrasch Queen's Gambit against Margaret Baron, and a series of tactical errors by Black left the result in no doubt. Aberystwyth's first clean sweep of the season, 4-0.

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1.Nf3 f5 2.d4 Nf6 3.Nc3 3.g3 main 3...g6 4.e3 encloses the B 4.Bg5 letting the B out & looking for control over e4 fits in better with Wh's last move 4...Bg7 5.Be2 5.Bc4 d5 is most frequent, though Wh only gets 20% of the results 5.Bd3 looks more active 5...d6 6.0-0 0-0 7.Bd2 7.d5 e5 8.dxe6 Bxe6 9.Ng5 Qe7 10.b3 d5 11.Bf3 c6 12.Ne2 Ne4 13.Rb1 Nxg5 Bolhovitin-Baumgaertel, BEM ch U16, Tamm 2001,0-1 7.Re1 Nc6 8.a3 a5 9.Bb5 d5 10.Ne5 Na7 11.Be2 Ne4 12.Bf3 Be6 13.Nd3 b6 14.Nf4 Bf7 15.Nb1 e5 Bocca-De Paula, Goiana ch 2016,0-1 7...Nc6 7...Qe8 also in search of e5 8.Re1 Qf7 8...e5 9.g3 9.Ng5 9...Ne4 10.Kg2 c6 11.Bd3 Nxd2 12.Qxd2 h6 13.Qd1 g5 13...e5 14.b3 Nd7 15.h3 Nf6 15...e5 16.Qc1 Qh5 17.Qd1 f4 Ziukelis-Gicaga, Kaunas cg, 2013,0-1 8.a3 e5 Wh's setup is very passive, so Bl sets up a pawn centre 9.Bc4+ 9.d5!? Ne7 10.Bc4 h6 Bl has a comfortable King's Indian structure 10...Kh8 11.Ng5 h6 12.Ne6 Bxe6 13.dxe6 d5 11.Nxe5 dxe5 12.d6+ Kh7 13.dxe7 Qxe7 but a bit similar to the game 9...Kh8 9...d5 10.dxe5 dxc4 11.exf6 Qxf6 12.e4= 10.dxe5 dxe5 11.Ng5 wasting time , as the threat is easily dealt with 11.e4 f4 and Bl prepares a K side pawn advance 11...Qe7 12.Nf3 e4 Bl has gained e4 & with dominance in the centre can hope for a K side attack. The B on d2 is an obstruction for Wh 13.Rb1? 13.Nd4 Ne5 14.Ba2 14.Nd5? Iolo Qf7!-+ Komodo12 14...Nxd5 15.Bxd5 Rd8 15...c6 only 16.Ba2 f4-+ Komodo12 15.Bb4 Nxc4 16.Bxf8 Bxf8 17.Nxf6 Qxf6-+ 14...c5 15.Nde2 Rd8 Komodo12 13...exf3-+ 14.Qxf3 Ne5 15.Qe2 c6 15...Nxc4 16.Qxc4 Be6 17.Qh4 Rfe8 simplest, but Bl was after a K side attack in the absence of the N protector on f3 16.Bb3 Nfg4 17.Na2? 17.h3 17...Nxh2 18.f3 18.Kxh2 Qh4+ 19.Kg1 Ng4 and Wh must give up the Q to stop mate 18.Bb4 Qh4 18...Nhf3+! 19.gxf3 Qg5+ 20.Kh2 f4 21.Rh1 21.Bxf8 Qh5+ 22.Kg2 Bh3+ 23.Kh2 Bg4+ 24.Kg2 Qh3+ 25.Kg1 Bxf3 26.Bxg7+ Kxg7 27.exf4 Qg2# Komodo12 19.f3 Nxf1 20.Bxf8 Ng3 21.Bxg7+ Kxg7 22.Qd1 Be6! 23.Bxe6 Rd8 24.Qe1 Nxf3+ 25.gxf3 25.Kf2 Ne4+ 26.Ke2 Nxe1 27.Rxe1 Qf2# 25...Qh1+ 26.Kf2 Qh2# Komodo12 18...Qh4 18...Nxf1 simplest, when Bl is a R up- but the K side still looked promising 19.Be1 Qh6 20.Rf2 Nhg4 returning some material to leave a weakened K side 20...f4 21.exf4 Qxf4 considered 22.Rd1 Nhxf3+ Komodo12 23.gxf3 Qg3+ 24.Kh1 Bg4! Komodo12 24...Nxf3 25.fxg4 Qh3+ 26.Kg1 Rxf2 27.Bxf2 Nf3+ 28.Qxf3 Qxf3-+ 21.fxg4 Nxg4 22.g3 Nxf2 22...Re8 slightly preferred by Komodo12 as the N is very well placed 23.Rf3 b6 24.Rd1 Ba6 25.Qg2 Nxe3-+ 23.Qxf2 23.Bxf2!? 23...Re8 24.Rd1 Bxb2 the Wh pawns are now all isolated 24...Be6 25.Bxe6 Rxe6 26.Rd7 Rae8 27.Bd2 R6e7 alternative 25.Rd3 Be5 avoiding any long diagonal threats 26.Nc1 26.Bc3!? 26...Qg7 27.Ne2 Be6 28.c4 Rad8 29.Nd4 Bg8 29...c5? 30.Nxe6 Rxd3 30...Qe7 31.Nxd8 Rxd8 32.Rxd8+ Qxd8 and Wh is a piece up 31.Nxg7 Bxg7 32.Qc2 Rexe3 33.Bf2 Rxb3 34.Bxe3 Rxe3 35.Qa4 a6 36.Qd7 Bd4 37.Kg2 gives up most of Bl's advantage 30.Rd1 c5 31.Ne2 Rxd1 32.Bxd1 Bxc4 0–1
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WhiteEloWBlackEloBRes
Denham,C1617Van Kemenade,R20230–1
Van Kemenade,J1755Evans,G13541–0
Greenwood,R1234Cook,J14910–1
Finlay,I1363Baron,M8501–0

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