Sunday, 7 November 2021

Match of the Day

After our defeat in the first round of the Open Section of the WCU Online League, Aberystwyth did much better against Morriston on Thursday 4th November. Rudy van Kemenade's Bird's Opening brought him no middlegame advantage against Peter Bevan, and they arrived at the ending equal. Apparently Black was distracted by the football at this stage, and went wrong, dropping a pawn and accepting an unfavourable exchange that left him with a weak bishop against a strong knight, after which Rudy was able to win comfortably. Adam Watkin-Jones's Pirc against Chris Howells quickly transposed into a King's Indian - I'm not sure whether this was intended or not, but Black's position seemed awkward and he was two pawns down when he resigned, perhaps a bit prematurely, given the opposite-coloured bishops. Against Francisco Marin Marin in a Closed Sicilian, my kingside attack was faster than Black's counter on the queenside and in the centre, and the push of the f-pawn broke open his king's position. My queen's bishop remained on its home square all game. Sam Holman's game against Duncan Williams was another King's Indian, in which Black had a dynamic position and good chances in the early stages. After locking his bishop in, though, he came under pressure, and eventually dropped a rook. A 2-2 draw was a good result for Aber.

In games for other teams, Tom got a good win against Keith Briggs's Slav Defence, exploiting Black's queenside weakness to get a passed pawn, then winning with a nice tactic, while Sam, in another King's-Indian-like opening again had a dynamic position against Gwyn Evans, but after both sides made mistakes in the ending the game was drawn.

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1.f4 d5 2.Nf3 Nf6 3.g3 c5 4.Bg2 g6 5.0-0 Bg7 6.d3 Nc6 7.Qe1 7.c3 0-0 8.Qe1 b6 9.Na3 Ba6 10.h3 h5 11.Ng5 Van Kemenade-Bevan, WCPL 2014,0-1 7...b6 8.h3 8.e4 3-1-1 8...Nd4 8...Bb7 1-1 9.Na3 9.Nxd4 Bl thought Wh could have played this cxd4 10.Qf2 10.Nd2 Bd7 11.Nf3 Qc8 12.Kh2 Qxc2 13.b3 0-0 14.Qf2 Rfe8 15.Ba3 Qc3= 10...0-0 11.Qxd4 Be6 12.Qf2 Qc8 13.g4 Qxc2= KomodoDragon2 9...Nxf3+ 10.Rxf3 Bb7 11.Rf1 11.Rf2 11...0-0 12.c3 12.g4 Qd7 13.f5 is perhaps worth a try, though KomodoDragon2 counters with Ne8 13...d4 14.c3 Nd6 15.Bf4 e5 though Wh retains some chances of getting some K side play 12...Qd7 13.e4?! this should have been played earlier, or held back now dxe4 14.dxe4 Ne8 14...Qc6! KomodoDragon2- wins the e pawn (which is why earlier the R should have gone to f2) 15.e5 15.Qd1= 15...Bxg2 16.Kxg2 f6 16...Qd5+ takes the open file, but Wh has enough resources 17.Kh2 Rd8 18.Be3= 17.Qe4 Nc7 18.Nc4 18.exf6 exf6 19.Be3 Rae8 20.Qf3 f5 21.Rfd1 liberates Wh's Q side 18...b5 can leave c5 hanging - Wh does manage to win it in the end 18...fxe5 19.Nxe5 19.Re1 exf4 20.Bxf4 Nd5 21.Be5 Rad8 22.Bxg7 Kxg7 23.Re2 Rf5 24.Rae1 19...Bxe5 20.Qxe5 Rf6 21.Qe2 Rd8 22.Be3= though Bl's N is a better piece than Wh's B 19.exf6 19.Ne3 KomodoDragon fxe5 20.f5= bypasses the Bl B 19...exf6 20.Ne3 20.Na5 considered by Wh, is a possibility 20...f5 21.Qb7!? succeeds in luring Bl pieces offside Rfb8 21...Rab8 calls Wh's bluff 22.Qf3 22.Qxa7 Qc6+ 23.Kh2 Ra8-+ 22...Rfd8 Wh has problems getting the Q side into play 22.Qf3 22.Rd1!? 22...b4 23.Rd1 23.Nc4 23...Qf7 24.c4 attempting to stabilize the position Bd4 24...Re8!-+ both lichess Stockfish14 & KomodoDragon2 think this simple development should be enough for a decisive advantage 25.Rb1 25.a3 considered may well be better a5 26.axb4 Rxb4 27.Ra3 Komodo Dragon2- but a human will probably be happy just to grab the b2 pawn Bxb2 27...a4 KomodoDragon2 28.Bxb2 Rxb2+ 29.Kg1 Qe6 25...Ne8 25...Re8!-+ is again given as winning by both lichess and KomodoDragon2 26.b3 Re4 27.Nc2 Ne6 28.Rd3 28.Be3 Bxe3 29.Nxe3 Nd4-+ 28.Bb2 Bxb2 29.Rxb2 Re8 30.Rd3 g5!-+ 28...Qb7 29.Kh2 Re8-+ the Wh pieces have very little activity 26.b3= 26.Nd5= Wh was still hoping to target the c5 pawn, so was reluctant to allow Bl to exchange off the pieces, as implied by Bl's last moves Nf6 27.Nxf6+ Qxf6 28.Be3 Bxe3 29.Qxe3 Qc6+ and all the heavy pieces will soon swap off as well. 26...Nf6 27.Nc2 27.Bb2!? KomodoDragon2 Bxe3 28.Qxe3 Re8 29.Be5 Rad8 30.Qxc5 Qb7+ 31.Kh2 Qf3 32.Rd6 Rxd6 33.Qxd6 Qf2+ 34.Kh1 Qxg3 35.Qxf6 Qxh3+ and its a perpetual 27...Bc3 28.Be3 Ne4 28...Qc7 29.Rd5 Rd8 29...Rc8 allows 30.Bxc5 29...a5 KomodoDragon2 30.Bxc5 a4 30...Nd2 31.Rxd2 Bxd2 32.Nd4 Bc3 33.Nc6 Re8 34.Ne7+ Kh8 35.Nd5 Bg7 36.Rd1 Re4 31.Rbd1 axb3 32.axb3 Ra2 33.Qd3 Re8 34.Bf2 Qe6 35.Kf1 Nxf2 36.Kxf2 Qe4 37.Rc1 Rb2-+ KomodoDragon2 30.Rbd1 Qc7 31.g4 Rxd5 31...Kh8 let the other side do the swapping- it usually brings pieces forward 32.Rxd5= Rd8 33.Qd1 Bf6 34.Rxd8+ 34.Qd3 Qc8 34...Qxd8 35.Qxd8+ Bxd8 36.a3 a5 37.axb4 axb4 38.Kf3 Kf7 39.Bc1 Bf6 40.Ne3 Bc3 gives Wh an unnecessary edge- Bl admitted afterwards being distracted by the football 40...Nd6 41.gxf5 Nd2+? this leaves the rather useless B facing a Nthat can cover all of the board ( also Wh already has a more active K 41...Nd6 42.fxg6+ hxg6 still considered level by KomodoDragon2, which targets the b3 pawn 43.Nc2 Nb7 44.Be3 Na5 45.Bxc5 Nxb3 46.Bxb4 Bxb4 47.Nxb4 Nd2+ 48.Kg4 Nxc4 and with the pawns all on one side it is a drawn position 42.Bxd2 Bxd2 43.fxg6+ hxg6 44.Ke4+- Ke6 45.Ng4 45.f5+ KomodoDragon2 45...Bc1 46.Ne5 g5 47.fxg5 47.f5+ should also be an easy win 47.Nd3! KomodoDragon2 Bd2 48.Nxc5+ Kd6 49.Nd3 -there are various ways for Wh to win 47...Bxg5 48.Nd3 48.Ng6 48...Be7 49.Nf4+ Kf7 49...Kd6 50.Kf5 and the h pawn wins 50.Kf5 50.Kd5 50...Kg7 51.Ke6 Bf8 52.Nd3 52.Kd5 52...Kg6 53.Kd5 Kg5 54.Nxc5 Kh4 55.Nd3 Kxh3 56.c5 Normal 1–0
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WhiteEloWBlackEloBRes
Van Kemenade,R1999Bevan,P19291–0
Howells,C1835Watkin-Jones,A19181–0
Francis,M1648Marin Marin,F18321–0
Williams,D1725Holman,S13861–0
Gunn,T1398Briggs,K13501–0
Evans,G1192Holman,S1386½–½
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