The Aberystwyth team is off to a good start in the New Year. On Monday 14 January we faced Steynton B at the Emylyn Cafe, Tanygroes. Rudy van Kemenade, playing the White side of a Sicilian on top board based his strategy round the domination of the black squares, especially d6, and it paid off in the end, though Mark Paffard missed his chance to get back in the game. I'm not sure why a positional player like Adam Watkin-Jones is so keen on the sharp Modern Defence, but it serves him well; this time he grabbed a pawn early against Jon Coles, and went on to dominate the game. Julie van Kemenade, on the other hand, loves double-edged positions, and she certainly got one against John Miller's French, with both players trying to queen pawns. In that situation, you'd generally back Julie to win, and she succeeded here after an exciting struggle. James Cook was thrown by Scott Hammett's choice of Larsen's Opening rather than his usual Bird's, and went wrong as early as move 2, dropping a pawn. As often happens in such situations, the setback made him reckless and he followed it up with an unsound piece sacrifice. The match finished 3-1 to Aber.
Our first home match of the season was against Cardigan B, who were missing one player. Rudy had a hard fight in a Dutch Defence against the rapidly improving Ben Brewer, reaching an equal middlegame with chances for both sides, but his greater experience told as White made an error that allowed him to invade the king position with his major pieces. It was a similar, but quieter story in the English Opening game between Adam and Josh Brewer. There was nothing in it till White seized his chance to win a key central pawn, after which Black fought hard but in vain to save the endgame. I don't often win positions with a good bishop against a bad one - somehow the so-called bad bishop usually turns out to be more useful than its reputation. Against Awne Osinga in a Sicilian, however, I took advantage of a bishop so bad that at one point all seven of White's pawns were on the same colour. With White reduced to passivity, I was able to take control of the position and force a won ending. With the default on Board 4, this was a 4-0 win to Aber.
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1.e4c52.Nf3e63.d3Nc64.g3g65.Bg5f65...Qc76.Bg2Bg76...h67.Be3d68.0-0Bg79.c3
Van Kemenade-Surtees, British Rapid 2018,1/2-1/27.c3e57...Nge78.0-0d69.Na3a610.d4main, Van Kemenade-Sarakauskas, British Rapid 2018,0-18.0-0d69.Na3Be610.d4Van Kemenade-Williams, Dyfed League 2018,0-16.Be3b6uncommon6...d57.exd5exd58.d4main6...d67.Bg2Bg78.d4cxd49.Nxd4Nxd410.Qxd4Ne711.Nc30-012.0-0-0f513.Qxd6Qxd614.Rxd6fxe415.Rhd1Miroshnichenko-Antal, Hotel Zuglo op Budapest 1999,1-07.Bg2Bb77...Bg78.0-0Nge79.d49.Nc30-010.d4cxd411.Nxd4Nxd412.Bxd4Bb713.Qe2Nc614.Be3f5Polyanskaya-Dimov, Moscow ch U18,2010,1-09...cxd410.Nxd4Nxd411.Bxd4Nc612.Bc30-013.Nd2Ba614.Re1Van Kemenade-
Valette,Chess Arena 2018,1-08.0-0Bg78...Nh69.Nh4Nf710.f4Qc711.Nc30-0-012.a3Makropoulos-Tsiknopoulos, GRE ch Athens 1971,1-09.d4opening up the position as Wh is ahead in development & looking at d69.Nc3Nge710.Qc10-011.Bh6d612.Bxg7Kxg713.Qd2e5Wilk-Suliborski,Gdansk
op 2010,0-19.c3alternative, to take back with the pawn on d49...cxd410.Nxd4Nxd411.Qxd4Ne711...Nh6!?Komodo12 & Stockfish1012.Nc312.Na3Bc613.Rad10-014.Qb4f5Stockfish1012...0-013.Rad1Bc614.f4±14.Qd2±14.Qb4±Stockfish1014...Qc715.a415.Qb4Rfe815...d516.exd5Nxd517.Nxd5Bxd518.Rxd5exd519.Bxd5+Kh820.Bxa8Rxa821.Qe4Rd822.f5±Stockfish1016.Nb5Bxb517.Qxb5Rad818.c3±
Stockfish1015...Rfd815...f516.e5Bxg217.Kxg2Qb7+18.Kg1d519.Qd3Nc620.Nb5Rfd8=Stockfish1016.Qc416.Nb5Bxb517.axb5Rac817...Qxc218.Qb418.Rc1Qb319.Rc7Qxb5=18...Bf819.Rc1a519...Qe220.Qb3Qg421.Bd4f522.h3Qh523.exf5+-20.Rxc2axb421.Bxb6Rdb822.Bd4Rxb523.Bxf6Kf724.Bd4Stockfish1016...Rac817.Rf217.Nb5Bxb518.Qxb5d519.exd5Nxd520.Bxd5exd521.c3Stockfish1017...Qb718.Rfd218.Nb5Bxb519.Qxb5±Stockfish1018...f518...d519.Qb3!+-intended19.Qb4Kf719...Bxc320.Qxc3fxe420...Bxe421.Qe5Kf722.Bd4Rg823.Bc323.Qf6+Ke824.Bxe4Qxe425.c3Rc626.Qh4h527.Kf2±23...Rxc323...Ke824.Bxe4Qxe425.Rxd7+-24.Bxe4Qxe425.Qxc3Rc826.Qe5±Stockfish1021.Qe5Nf522.Bd4Nxd423.Rxd4Bd524.Qg5Rf825.Bxe4Bxe426.Rxd7Qc627.Qh6Qc5+28.Kf1Rf729.Rxf7Kxf730.Qxh7+Ke831.Qg8+Ke732.Qg7+Ke833.Qg8+=Stockfish1020.e5Wh's
strategy had been based on playing this & keeping the d pawn tied down- byt
Stockfish 10 doesn't think much of it20.Bd4Bxd4+21.Qxd4a621...d522.Qf2fxe423.Bxe4Nf524.Bxf5exf525.b3a626.Ne2±Stockfish1020.Nb5Bxb521.axb5±Stockfish10- considered20.Nd5consideredBf8=Stockfish1020...exd521.exd5±20...Bxg221.Rxg2Bf821...d6!Stockfish10- when a pawn that has been under restraint is actually able
to move, it usually does some damage- Nimsovitch ( more or less)22.Nb522.Rxd6Nc623.Qc423.Qa3Bf824.Nb5a625.Qb3axb526.Qxe6+Kg727.axb5Bxd628.Qf6+Kg829.exd6Qf729...Na530.Bd4+-30.Qxf7+Kxf731.bxc6Rxd632.c332.Bxb6Rd1+33.Kf2Rxc634.Be3Rxc2+35.Kf3Rf1+36.Rf2Rfxf2+37.Bxf2Rxb2-+32...Rd1+33.Kf2Rxc6Stockfish1022.exd6Bxc323.bxc3Nd524.Qd4Rxd625.Rgd2Rdc626.Qe5Qc727.Bd4Qxe528.Bxe5h6-+Stockfish1022...Nd523.Rxd5Qxd524.Nxd6+Rxd625.Qxd6Qxd626.exd6Bxb227.d7Rd828.c4Bf629.a5Rxd730.Ra230.axb6axb631.Bxb6Rd1+32.Kf2Rc133.c5Bd4+34.Ke2Bxc535.Bxc5Rxc536.Kd3e537.fxe5Rxe5though with all the pawns on one side most likely drawn30...Bd431.Kf2e532.fxe5Ke633.axb6axb634.Bxd4Rxd435.Rb2Kxe536.Rxb6Rd2+37.Kg1Rc238.Rb7h539.Re7+Stockfish10 =22.Qb322.Qb5Nc623.Rgd2Bb424.Rd3Rc7=Stockfish1022...Nc623.Rgd223.Nb5Na524.Qd3Nc425.c3a626.Nd4d627.exd6Rxd6Stockfish923.Qa2d6=23...Nb423...Na524.Qb5d5Stockfish1025.exd625.Bd4Bc526.Rf2a627.Qe2Nc428.Bxc5Rxc529.b4Rcc830.Qf3Nb231.Ra1Qc632.Ne2Qxc225...Nc426.Rd3Nxe327.Rxe3Bxd628.Qb3Bc529.Qxe6+Kg7-+Stockfish10
24.Nb524.Bf2Nc625.Nb5Na526.Qa2a627.Nd4Nc628.Nf3Kg829.Ng5Kg730.Qc4=24...Nd524...a625.Na3Kg726.Bf2Nd527.c4Nb428.h325.Bf2±25.Rxd5considered for a while & pm analysis, still looks
unclearexd526.Rxd5Kg726...Ke827.Rd6Qe428.Rd4Qf329.Rd3Qe230.Nc3+-Stockfish1027.c327.Nd6Bxd628.Rxd628.exd6Rxc229.Bd4+Kh630.g4fxg431.h3Re832.Be5Rc1+33.Kf2Qa634.Rb5Qb7-+
Stockfish10, & pm analysis28...Qe429.Rd2Rc427...a628.Nd4Be729.a5b530.Nf3h631.Kf2±Stockfish10 just regaqrding it as a
positional sacrifice25.c4consideredNxe325...Rxc4!
Stockfish1026.Qxe3Rxc426...Bc5?27.Qxc5Rxc528.Nd6+Ke729.Nxb7+-25...a626.c4Nb4after this the Bl position goes downhill26...Nxf4expected27.gxf4axb528.Qxb528.axb528...Qe429.Qxb6Be730.Qd4Rxc431.Qxe4fxe431...Rxe432.a5Ke833.a6Ra834.a7+-32.Bb6e333.Bxe3Rxa434.Rxd7Rxd735.Rxd7Rc436.Kf2Stockfish10,
though the extra pawn looks healthy, if rather far back still.26...axb527.cxd5bxa428.Qxa428.Qb5exd529.Rxd5Qc630.Bxb6Qxb531.Rxb5Re832.Rxd7+Re733.Rdd5Rb734.Bf228...b529.Qb3Be730.Qf330.d6Bf8+-entombs the B, which Engines have difficulty with appreciating that
it is a longterm win.30...Qa831.h3Stockfish1027.Nd6+Bxd628.Rxd6a528...Nc629.Qxb6Qxb630.Bxb6Re831.Rxd7+is not much good for
Bl either29.Bxb6Rc730.Bxa5!maximising gainQa7+31.Bb6Qb732.Bxc7Qxc733.Qxb4Ke834.Qb534.c534...Qa7+35.c5Wh has too many
threats & material35.c5Ke735...g536.Rxe6+36.R1d436.Rxd7+Rxd737.Qxd7+Qxd738.Rxd7+Kxd739.b4and Wh has 3 passed pawns36...g537.Qb4Ke838.c6Stockfish101–0
Meetings every Tuesday upstairs at The Scholars, Aberystwyth, 6.30 pm. All welcome.
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