It is still very early in the season, but the Aberystwyth team looks to have a ruthless streak about it at the moment. Steynton A were competitive in every game at the Emlyn Cafe, Tanygroes on Monday 29th October but Aber scored another whitewash. Rudy van Kemenade won a pawn in a Reti against Martin Jones, and kept control of the endgame, though Black missed the chance to transpose into a drawish rook-and-pawn position. Adam Watkin-Jones had a complex struggle against David Pinch in a Modern / London hybrid opening, until White suddenly blundered, handing him a rook with mate to follow. Julie van Kemenade's King's Indian Attack against John Miller's French was also double-edged, with both sides having vulnerable kings, but White's attack proved more dangerous. Finally, James Cook could not find a way through in a major-piece battle against Scott Hammett's Bird's Opening, and offered a draw, which White should have accepted, as the position opened up for Black a couple of moves later. Another 4-0 win for Aber.
Meanwhile the club championship has started, and the first game was a solid positional win for Dan Hardman against Francis Headley in a King's Indian Defence.
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| Move | N | Result | Elo |
|---|---|---|---|
| Replay and check the LiveBook here |
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1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.0-0 c5 4...0-0 5.d3 Nc6 6.c4 6.e4 6.Nbd2 6...d5 6...0-0 7.cxd5 7.Nc3 d4 7...dxc4 8.dxc4 0-0 9.Be3
if Wh is playing for a miniscule edge 8.Na4 is a Reversed Yugoslav King's
Indian 7...Nxd5 8.Nc3 8.a3 8.Qc2 8...Nxc3 8...0-0 transposes to
600 + games 9.bxc3 0-0 after some thought, Bl decines 9...Bxc3 10.Rb1
4 Wh wins, 1 draw, 3 Bl wins 0-0 10...Bg7 11.Qc2 Qd6 12.Be3 12.Ba3
Martin & Komodo12 12...b6 13.Bf4 Qd7 14.d4 c4 14...Qf5 15.e4 Qh5 16.dxc5 Qxc5 17.Qxc5 bxc5 18.Rfc1 18.e5 Komodo12 15.Rfd1±
Speelman-Ady, Commonwealth ch, London 1985,1-0 11.Qa4 Qa5 12.Qc4 12.Qxa5 Bxa5 13.Be3= 12...Bf6 13.Bd2 Be6 14.Qxe6 fxe6 15.Bxa5 Nxa5 16.Nd2 Rab8 17.Bh3 Kf7 18.Ne4 b6 19.Kg2 Nc6 20.Rbc1 Rbd8 21.f4 Nd4 22.Rfe1 h6 Kramnik-Mamedyarov, Geneve Masters KO Rapid 2013,1/2-1/2 10.Be3
Cloud Engines 10.Qb3 transposes to some 40 games 10.Qc2 to some 20 10.Rb1 8 games incl Kramnik-Mamedyarov 10...Qd6 10...b6 11.d4 Bb7 12.dxc5 Na5 12...bxc5 13.Rb1 Qxd1 14.Rfxd1 Ba6 15.Bxc5 Bxe2 16.Re1 Bxf3 17.Bxf3 Rac8 18.Bxe7 Nxe7 19.Rxe7 Rxc3 20.Bd5 Komodo12 13.Qa4 bxc5 14.Rfd1 Bc6 15.Qa3 Qc7 16.Qxc5 Diamant-Molner, USA tt ICC-INT 2012, 1/2-1/2
10...Bxc3 11.Rc1 Qa5 12.Nd2 Be6 13.Ne4 Bb2 14.Rc2 Bd4 15.Nxc5 Bxe3 16.Nxb7 Qe5 17.Rxc6 Bb6 18.e3 Bxa2 19.Qa4 Be6 20.d4
Anastasian-Shirov, Frunze op 1989,1-0 11.Nd2 Bf5 11...b6 12.d4=
Komodo12 12.Nc4 12.Rc1 b6 13.Qa4 Rac8 14.Rfe1= Komodo12 12...Qd7 13.Bxc5 Bxc3 14.Rb1 14.Rc1 14...Rab8 15.Ne3 15.Qa4 Bh3 16.Bxh3 Qxh3 17.Rfc1 Bg7 18.Nd2 Rfc8= Komodo12 15...Be6 15...Bh3 16.Bxh3 Qxh3 17.Nd5 considered by both 16.Rc1 16.d4 briefly considered by Wh Nxd4 17.Bxa7 Bxa2 18.Rc1 Bb2 19.Rc2 Bb3 20.Qb1 20.Bxb8 Rxb8 21.Qd3 Bxc2 22.Nxc2 Qa4 20...Bxc2 21.Qxb2 Nxe2+ 22.Kh1 Bd3 23.Bxb8 Rxb8 24.Rd1 Qb5 25.Qa3 Bc4 26.Qxe7 Be6 27.Qf6= Komodo12 16...Bd4 16...Bg7 17.Re1 Rfc8 18.Qa4 Rc7 Komodo12 17.Bxc6 Komodo12 17.Qa4= 17.Bxd4 Nxd4 18.Nc2 Nb5 19.Qd2 Rfc8 20.Ne3 Nd4= 17...bxc6 18.Bxd4 Qxd4 19.Rxc6 Bxa2 Komodo12 doesn't like getting the pawn back this quickly 19...Rb2 20.Qa1 20.Rc2 Rfb8 21.Qa1 Qg7 22.Rfc1 h5 23.a4 a5 20...Rd8 21.Rc2 Rxc2 22.Qxd4 Rxd4 23.Nxc2 Ra4 24.Ra1 Rxa2 24...Bxa2 25.Rxa2 Bxa2 26.Nb4 Be6 27.Nc6 Bd7 28.Nxa7= though the N is trapped Kf8 29.Kg2 Ke8 30.d4 Kd8 31.d5 Kc7 32.Kf3 e6 33.Nc6 Kd6 34.Nb4 exd5 35.Ke3= Komodo12 20.Qa1± Qxa1 20...Qd7 21.Rfc1 Be6 22.Rc7 Qd6 23.Rxa7± 20...Rb2 21.Rc2! Komodo12 21.Nd1 seen by both players Bd5 missed 22.Ra6 Rb4 23.Qxd4 Rxd4 24.Rxa7± 21...Rfb8 22.Nd1 R2b4 23.Qxd4 Rxd4 24.Rxa2+- Komodo12 21.Rxa1 Rb2 22.Rc2 Rxc2 22...Rfb8 23.Rxa2+- had been
foreseen by Wh going into Bxc6, realised now by Bl that could not be played 23.Nxc2 Bb3 24.Nd4 missed by Bl, again seen earlier by Wh Bd5 25.Rxa7± e5 a strong move, which allows Bl to swap of a pair of pawns before Wh can
stabilize his position 25...e6 not as good 26.Ra5 26.Nb5 in
retrospect better, though Wh needs to be careful Rb8 26...Ra8 Komodo12
plumps for this, though in the longrange Bl has better survival chances in a R
& P ending 27.Rxa8+ Bxa8 28.f3± the stability of the pawns helps the N
rather than the B 27.Nc3 Bc6 28.Rc7 Bb7 29.f3± 26.Rd7 Ba8 27.Nb3 Rb8 27...e4 28.d4± 28.Nd2 28.f3 Bxf3 29.exf3 Rxb3= 28...Kg7 29.Kf1 Rb2 30.Ke1± Komodo12 26...Rd8 27.Nc2 27.Nb5 again better e4 28.dxe4 Bxe4 29.f3 Bf5 30.Kf2± 27...e4 28.Nb4 28.dxe4 Bxe4 29.Ne3 Rd2 30.Kf1 Kg7 31.f3 Bb1 32.Ke1 Rb2 33.Nc4 Rc2 34.Nd6 Rc6 35.Rd5 Ba2 36.Rd2 Be6 37.Kf2± Wh must keep Ns on but hope to swap Rs 28...exd3 29.Nxd3 Be4 30.Ra3 30.Ne1 Rd1 31.Kf1 Bg2+! 32.Kxg2 Rxe1 30...Rb8 30...Bxd3 is simplest route for Bl 31.f3 Bf5 31...Bxd3 32.Rxd3 Rook and
Four Pawns vs Rook and Three Pawns. 'This is one of the best-known problems in
endgame theory:is the attacker winning? Theoretically the answer is no, but in
practice it is not at all easy to defend.First of all it must be sressed that
just waiting passively is not sufficient' Mueller & Lamprecht- Fundamental
Chess Endings 2001:212. They cite a game won by Botwinnik & one lost by
Kasparov . Fine 1941 cites 2 wins by Capablanca. So Bl should have taken the
chance given to him. 32.exd3 Rb2 is even less likely to manage to convert
the extra pawn 32.e4 Rb1+ 33.Kf2 Be6 34.h4 h5 all the pawns on the same
colour as the B- Wh needs to come in using the bl squares 34...h6 35.Ke3 Kg7 36.Kf4 Rb3 helps Wh , who now need not worry about the safety of his g &
h pawns 36...Bc4 37.Ne5 Be6 and Komodo12 is rather clueless about what to
do, spending all its move just waving the N about. 38.g4 38.Rc3 Ra1 39.Nd3 Bd7 40.Nc5 Rd1 41.Ke5 Bb5 42.f4 Be2 43.Ra3 Bc4 44.Ra7 Rg1 45.Kd4 Bb5 46.Ne6+ Kf6 47.Ng5 Rd1+ 48.Kc5 Bd7 49.e5+ Kg7 Wh is trying to get access to
f6 for K or N, or getting a passed e pawn 50.Rc7 Kf8 51.Nh7+ Kg7 52.Nf6 Be6 53.Ra7 Rd3 54.Ne4 Bf5 55.Ng5 Bd7 56.Kc4 Rd1 57.Kc3 Kg8 58.Kc2 Rd4 59.Ra3 Bf5+ 60.Kc3 Rd3+ 61.Kb4 Rd7 62.Ra6 Rc7 63.Kb5 Rd7 64.Rf6 Kg7 65.Kc6 Re7 66.Nf3 Bc8 67.Nd4 Ra7 68.f5 Ra4 69.Kc5 Ra5+ 70.Kd6 Ra4 71.Kd5 Bb7+ 72.Kc5 Ra5+ 73.Kd6 Bh1 74.fxg6 Rd5+ 75.Kc7 Rxd4 76.gxf7 Kf8 77.e6 and this
position Komodo12 does accept is winning for Wh Re4 78.Kd6 Rd4+ 79.Ke5 Rd5+ 80.Kf4 Rd4+ 81.Kg5 Rd5+ 82.Kh6 Re5 83.Rg6+- long drawnout, with
Komodo12 constantly nudged, involves several plausible lines of continuation. 38...Rh1 39.Kg3 hxg4 40.fxg4 40.Nxg4 Bxg4 41.Kxg4 assures the draw, one
pawn less all on the same side is easy to hold 40...Rg1+ 41.Kf4 f6 42.Ra7+ Kg8 42...Kh6? 43.g5+ fxg5+ 44.hxg5+ Rxg5 45.Re7 Ba2 46.Ng4+ Rxg4+ 47.Kxg4 and with a passed pawn the R beats the B 43.Nc6 Rxg4+ 44.Kf3 f5= 44...Rxh4 45.Ne7+ wins the R 45.exf5 Bxf5 46.h5 Rg5 46...gxh5 47.Ne7+ Kg7 48.Nxf5+ Kf6 also draws, as the Bl K is not stuck on the back rank 47.Ne7+ Kf8 48.h6 Rh5 49.Nxf5 Rxf5+ 50.Kg4 Kg8 51.Rg7+ Kh8 52.Rxg6 Rf1= 52...Ra5= 37.Rxb3 Bxb3 38.Ke5 the B & K are unable to hold the bl
squares against an advanced K & agile N f6+ this attempt helps Wh obtain a
passed e pawn 38...Bd1 39.f4 Bc2 40.Nb4 Bb1 41.Kd4 41.Nd5 f5 42.Nf6 fxe4 43.Nxe4 Kf7 44.Nd6+ Ke7 45.f5 gxf5 46.Nxf5+ Kf7 is a clear win-
Lomonosov table bases ( a Stockfish8 has also exhaustively examined this
position to a win)- Wh puts a N on f4, then outmanouvres the Bl pieces crowded
in defence 47.Ne3 Kg6 48.Ng2 Kh6 49.Nf4 Ba2 50.Kf6 Bc4 51.Ne6 Be2 52.Nd4 Bc4 53.Nf5+ Kh7 54.Kg5 Bd3 55.Ne3 Bg6 56.Ng2 Be8 57.Nf4 to give one
possible line by Rudy 41...f5 39.Kd6 39.Kd4 perhaps 39...Bc4 40.Nf4 40.Nc5+- is much simpler 40...Kf7 41.Nd5 Be2 41...Bd3 holds up the
pawn advance, but not for long 42.Nc3 g5 43.f4+- 42.f4+- Bf3 43.e5 fxe5 44.fxe5 Bg4 45.Nf4 45.Nc7 again is more accurate, as it controls the
queening square 45...Bf5 46.e6+ Ke8 47.Nd5 Bc2 and Bl resigned while Wh
was checking whether Nf6ch ( the N might get lost but it doesn't matter much
or Nc7ch was best 1–0
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| White | EloW | Black | EloB | Res |
|---|---|---|---|---|
| Van Kemenade,R | 2023 | Jones,M | 1755 | 1–0 |
| Pinch,D | 1718 | Watkin-Jones,A | 1940 | 0–1 |
| Van Kemenade,J | 1755 | Miller,J | 1629 | 1–0 |
| Hammett,S | 1524 | Cook,J | 1491 | 0–1 |
| Hardman,D | 1306 | Headley,F | 1182 | 1–0 |
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