64th OK Championship Championship Games 2009

(1) Unruh,Charles M (1739) - Fritze,Skip (1429) [A00] 64th OK Championships - Reserve (2.1), 27.06.2009 [Rybka 2.3.2a 32-bit (20s)] A00: Irregular Openings 1.g3 e6 2.Bg2 d5 3.c4 c6 4.d4 f5 5.Nc3 Nf6 6.Nf3 Bd6 7.0-0 0-0 8.b3 last book move 8...Nbd7 9.Qc2 b6 [9...Qe8 10.a4 Qh5 11.Ba3 Bxa3 12.Rxa3 Ne4 13.Re1 Rf6 14.Qc1 Rh6 15.b4 Ndf6 16.h4 Bd7 17.Nxe4 fxe4 18.Ne5 Rf8 19.b5 Qe8 20.bxc6 Bxc6 21.a5 a6 22.Rc3 Qd8 23.Bh3 Nd7 24.Nxd7 Kalinin,M (2270)-Beyer,H (2190)/Hamburg 1994/EXT 97/1/2-1/2 (48); 9...Ne4 10.e3 Qe8 11.Bb2 Qh5 12.Ne2 Ng5 13.Nxg5 Qxg5 14.Nf4 Qf6 15.Nd3 Qe7 16.Rae1 Nf6 17.Ne5 Bd7 18.f3 Be8 19.Kh1 Bh5 20.Qd3 Rad8 21.c5 Bc7 22.b4 g5 23.Rc1 g4 24.f4 Oud,N (2023)-Simon Padros,E (2251)/Dresden GER 2008/The Week in Chess 694/1/2-1/2 (57)] 10.Bb2 Qe7N [10...Bb7 11.Nd2 c5 12.Nb5 Bb8 13.dxc5 bxc5 14.Rad1 a6 15.Nc3 Ra7 16.cxd5 Nxd5 17.e4 Nb4 18.Qb1 f4 19.Nf3 Qc7 20.Rfe1 Nf6 21.a3 Nc6 22.e5 Nd7 23.Na4 Na5 24.Rxd7 Qxd7 25.Nxc5 Leao,M (2132)-Lima,O (1992)/Brazil 1990/EXT 2003/1-0 (59)] 11.Rac1 Ne4 12.cxd5 exd5 [0.64 Rybka 2.3.2a 32-bit : 12...cxd5 13.Nb5 Ba6 14.Nxd6 Qxd6 15.Qc7 Bxe2 16.Qxd6 Nxd6 17.Rfe1 Bxf3 18.Rxe6 Bxg2 19.Rxd6 0.10/14 ; 12...cxd5!? 13.Nb5 Ba6 14.Nxd6 Qxd6= ] 13.Nxe4+/= fxe4? [1.53 Rybka 2.3.2a 32-bit : 13...dxe4 14.Qxc6 Rb8 15.Qd5+ Kh8 16.Ne5 Nxe5 17.dxe5 Bc5 18.Qc4 Be6 19.Qa4 b5 0.70/13 ; >=13...dxe4 14.Qxc6 Rb8+/- ] 14.Ne5?? throwing away the advantage [-0.16 Rybka 2.3.2a 32-bit : 14.Qxc6 Ba6 15.Qxd5+ Kh8 16.Ng5 Nf6 17.Qe6 Rae8 18.d5 Bxe2 19.Rfe1 1.53/13 ; >=14.Qxc6 White would have gained the upper hand 14...Rb8 15.Qxd5+ Kh8 16.Ne5+- ] 14...Nxe5= 15.dxe5 White has a new passed pawn: e5 15...Bc5 16.e3 White has a new backward pawn: f2 16...Ba6 17.Rfe1 Bd3 Black threatens to win material: Bd3xc2 18.Qd2 Bb4 19.Bc3 Bxc3 20.Rxc3 c5?? letting the wind out of his own sails [1.42 Rybka 2.3.2a 32-bit : 20...Qe6 21.Rec1 Rac8 22.Rxd3 exd3 23.f4 c5 24.Qxd3 Rfd8 25.Rd1 d4 26.Be4 g6 -0.20/14 ; >=20...Qe6= and Black can hope to live] 21.Rxd3+- exd3 22.Bxd5+ Kh8 23.Bxa8 Rxa8 24.Qxd3 Qxe5 25.Rd1 h6 26.Qd5 Qf6?? Oops.... the pressure is too much, Black crumbles [8.98 Rybka 2.3.2a 32-bit : 26...Qxd5 27.Rxd5 Rc8 28.Rd7 a5 29.Rb7 c4 30.bxc4 Rxc4 31.Rxb6 Rc2 32.a3 Rc3 33.e4 1.35/15 ; >=26...Qxd5 27.Rxd5 Rc8+/- ] 1-0

(2) Pennington,Alex - Lin,Kenny [C50] 64th OK Championships - Reserve (3.11), 27.06.2009 [Rybka 2.3.2a 32-bit (20s)] C50: Hungarian Defence and Giuoco Pianissimo 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Bc5 5.Nc3 d6 6.h3 h6 7.0-0 0-0 last book move 8.Nd5 Be6 9.Be3 Bb6 10.Nxb6 axb6 11.Bxe6 [11.b3 Bxc4 12.bxc4 Ra7 13.c3 Qd7 14.Qc2 Qe6 15.Nd2 Rfa8 16.Qb2 Ra6 17.d4 exd4 18.cxd4 Nxe4 19.d5 Qe5 20.Qxe5 dxe5 21.Nxe4 Rxa2 22.Rxa2 Rxa2 23.dxc6 bxc6 24.Nc3 Ra3 25.Nb1 Ra4 Louvrier St Mary,D (1080)-Chapelle,L (1330)/France 2004/EXT 2005/1-0 (61)] 11...fxe6 Black has new doubled pawns: b6, b7, e5+e6 12.Qd2N [12.Nd2 d5 13.f3 Nh5 14.Bf2 Nf4 15.Kh2 Qe8 16.g3 Nh5 17.c3 Rd8 18.d4 exd4 19.cxd4 Qg6 20.e5 Qd3 21.Nb3 Qxd1 22.Raxd1 Rxf3 23.Kg2 Rf7 24.Be3 Rdf8 25.Rf2 Rxf2+ 26.Bxf2 g5 Pataki,I-Kiss,G (2160)/Ajka 1993/EXT 2000/0-1 (39)] 12...d5 13.exd5 exd5 14.d4 exd4 15.Nxd4 Ne4 16.Qd1 Nxd4 17.Bxd4 c5 Black threatens to win material: c5xd4 18.Be3 [-0.51 Rybka 2.3.2a 32-bit : 18.Be5 Qd7 19.f4 d4 20.Qd3 Nf6 21.Rf2 b5 22.f5 Rfe8 0.03/13 ; 18.Be5!?= ] 18...d4=/+ Black wins space 19.Bxh6 gxh6 Black wins a piece [0.21 Rybka 2.3.2a 32-bit : 19...Qh4 20.f3 Ng3 21.Bd2 Nxf1 22.Qxf1 Qf6 23.a4 Rf7 24.Qc4 Qc6 25.Ra3 -0.57/14 ; >=19...Qh4!? must be considered 20.Bd2 Rxf2=/+ ] 20.Qg4+= Ng5 21.h4 White threatens to win material: h4xg5 21...Kh7 22.hxg5 Qxg5 23.Qxg5 [-0.15 Rybka 2.3.2a 32-bit : 23.Qe4+ Qg6 24.Qxb7+ Kh8 25.f4 Rab8 26.Qd7 Qxc2 27.Rae1 Rg8 28.Rf2 Qh7 0.57/13 ; 23.Qe4+!? is interesting 23...Kh8 24.Qxb7+/= ] 23...hxg5= A double rook endgame occured. 24.Rfe1 Rae8 25.Kf1 Kg6 26.a4 Rh8 [0.51 Rybka 2.3.2a 32-bit : 26...Ra8 27.Ra3 c4 28.Re4 Rf4 29.Re7 Raf8 30.Re6+ R8f6 31.Rxf6+ Rxf6 32.Ke2 Rf5 33.Rg3 -0.01/15 ; 26...Ra8!?= is noteworthy] 27.Rxe8+/= Rxe8 28.Re1 Rxe1+? [1.80 Rybka 2.3.2a 32-bit : 28...Ra8 29.Re6+ Kf5 30.Rxb6 Rxa4 31.Ke2 Ra1 32.Rxb7 Rc1 33.Kd3 Rd1+ 34.Ke2 Rc1 35.Kd3 0.65/17 ; >=28...Ra8 would allow Black to play on 29.Re6+ Kf5 30.Rxb6 Rxa4+/= ] 29.Kxe1+- Kf5 30.f3 c4? [2.42 Rybka 2.3.2a 32-bit : 30...Kf4 31.Kf2 Ke5 32.g3 Kd5 33.b3 Ke5 34.Ke2 Kd6 35.f4 g4 36.Kd3 Kd5 37.f5 1.27/20 ; 30...Kf4 31.Kf2 Ke5+- ] 31.g3+- Ke5 32.b3 cxb3? [4.02 Rybka 2.3.2a 32-bit : 32...b5 33.axb5 d3 34.cxd3 cxb3 35.Kd2 Kd4 36.f4 g4 37.Kc1 Kc5 38.f5 Kd6 39.d4 2.36/20 ; 32...b5 33.axb5 Kd5+- ] 33.cxb3 d3 34.Kd2 Kd4 35.g4 [-3.60 Rybka 2.3.2a 32-bit : 35.b4 b5 36.a5 Kc4 37.f4 gxf4 38.gxf4 Kd4 39.f5 Kd5 40.Kxd3 Ke5 41.Kc3 Kxf5 4.02/24 ; >=35.b4 and White has prevailed 35...b5 36.a5+- ] 35...b5-+ 36.axb5 b6 37.b4 Black now must not overlook the idea Ke5. 37...Kc4 38.f4 gxf4 39.g5 Kd5 [0.00 Rybka 2.3.2a 32-bit : 39...f3 40.g6 f2 41.g7 f1Q 42.g8Q+ Kxb4 43.Qg4+ Ka5 44.Kc3 Qb1 45.Qg2 Qc2+ 46.Qxc2 -3.60/20 ; >=39...f3 ends the debate 40.g6 f2-+ ] 40.Kxd3 Ke5 41.g6 Kf6 Black threatens to win material: Kf6xg6 42.Ke4 White threatens to win material: Ke4xf4 42...Kxg6 43.Kxf4 Kf6 1/2-1/2

(3) Maldonado,Ernest - Unruh,Charles M [A59] 64th OK Championships - Reserve (3.1), 26.06.2009 [Rybka 2.3.2a 32-bit (20s)] A59: Benko/Volga Gambit: White castles by hand 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 g6 last book move 8.Bxa6 Nxa6 [8...Rxa6 9.Nf3 Nbd7 10.0-0 Bg7 11.Qe2 Qb6 12.e5 dxe5 13.Nxe5 Nxe5 14.Qxe5 0-0 15.Qe2 Rb8 16.Bf4 Rb7 17.Rac1 Ra8 18.b3 Qb4 19.Be3 Rd7 20.Rfd1 Rad8 21.Qc4 Rc8 22.h3 h5 23.a4 Knaak,R (2490)-Gonzalez,G (2200)/Tunja 1984/MCD/1-0] 9.f4 [9.a3 Bg7 10.Nf3 0-0 11.0-0 c4 12.Qe2 Qc7 13.Be3 Ng4 14.Bd4 Bxd4 15.Nxd4 Ne5 16.Ncb5 Qb6 17.Rac1 Nc5 18.f4 Ned7 19.Qxc4 Nxe4 20.Qc7 Qxc7 21.Nxc7 Rab8 22.b4 Nb6 23.f5 Nd2 Datta,A-Altschuler,D/Stillwater USA 2007/The Week in Chess 670/1-0 (41)] 9...Bg7N [9...Qa5 10.Bd2 Nb4 11.Qb1 Qa6 12.Nge2 Nd3+ 13.Kf1 Bg7 14.g3 0-0 15.Kg2 Rfb8 16.b3 c4 17.Nc1 Nxc1 18.Bxc1 cxb3 19.Bb2 Qc4 20.axb3 Qxb3 21.Rxa8 Rxa8 22.Ba1 Qxb1 23.Rxb1 Nxe4 24.Nxe4 Reinemer,F (2280)-Franz,G (2155)/Leverkusen 1997/CBM 060 ext/0-1 (48)] 10.Nf3 Qa5 11.0-0 0-0 12.h3 Consolidates g4 12...Rfb8 13.Re1 White plans e5 13...Nd7 14.e5 White gets more space 14...c4 15.Nd4 Nb4 16.Nc6 Nxc6 17.dxc6 White has a new passed pawn: c6 17...Nc5 18.Nd5 [-0.73 Rybka 2.3.2a 32-bit : 18.exd6 exd6 19.Qxd6 Rd8 20.Qe7 Bxc3 21.bxc3 Qxc3 22.c7 Rd7 23.Qe8+ Rxe8 24.Rxe8+ Kg7 -0.14/11 ] 18...dxe5 [0.03 Rybka 2.3.2a 32-bit : 18...Nd3 19.Nxe7+ Kf8 20.exd6 Qxe1+ 21.Qxe1 Nxe1 22.c7 Re8 23.Nc6 Rec8 24.f5 Nc2 25.Rb1 -0.73/13 ] 19.c7 Rc8?? Black has let it slip away [2.58 Rybka 2.3.2a 32-bit : 19...Re8 20.b4 cxb3 21.Bd2 Qb5 22.axb3 Rxa1 23.Qxa1 Qc6 24.Qa5 Qxd5 -0.06/12 ; >=19...Re8!? is a viable option 20.b4 cxb3= ] 20.Nxe7+?? forfeits the advantage [0.98 Rybka 2.3.2a 32-bit : 20.b4 cxb3 21.axb3 Qxa1 22.Nxe7+ Kh8 23.Nxc8 Ne6 24.Nb6 Qa7 25.Be3 Nxc7 26.Nxa8 Qxa8 2.58/15 ; >=20.b4 and White can celebrate victory 20...cxb3 21.axb3 Qxa1 22.Nxe7+ Kh8 23.Nxc8+- ] 20...Kh8+/- 21.Nxc8 Rxc8 22.Bd2 [0.42 Rybka 2.3.2a 32-bit : 22.b4 cxb3 23.axb3 Qxc7 24.fxe5 Bxe5 25.Ra2 f6 26.Qd5 Qb6 27.Be3 Qxb3 28.Qxb3 Nxb3 0.98/13 ] 22...Qxc7 23.Bc3 White threatens to win material: Bc3xe5. Blocks the pawn on c4 23...Nd3 24.Re2 [-0.09 Rybka 2.3.2a 32-bit : 24.fxe5 Qc5+ 25.Kh2 Nxe1 26.Qxe1 Re8 27.Rc1 Rxe5 28.Qf1 Re3 29.Bxg7+ Kxg7 30.Rxc4 Qa7 0.44/14 ; 24.fxe5 Nxe1 25.Qxe1 Re8+/= ] 24...Qc5+ 25.Kh1 Nf2+?? Black is ruining his position [1.52 Rybka 2.3.2a 32-bit : 25...Nxf4 26.Rc2 e4 27.Qf1 Qd6 28.Rd2 Qb8 29.Bxg7+ Kxg7 30.Qf2 Qe5 31.Qd4 0.13/13 ; >=25...Nxf4 would keep Black alive 26.Rd2 Nd3= ] 26.Rxf2+- Qxf2 27.Qd7 Rf8 28.a4?? a transit from better to worse. [-0.42 Rybka 2.3.2a 32-bit : 28.fxe5 Kg8 29.a4 Qg3 30.Re1 Qd3 31.Rd1 Qe2 32.a5 Rb8 1.37/13 ; >=28.fxe5 Kg8 29.a4+- ] 28...exf4=/+ 29.Qd5 Bxc3 30.bxc3 Qb2 Black threatens to win material: Qb2xa1 31.Qd4+ White forks: h8+f4 31...Kg8 32.Re1 Qb3 Black threatens to win material: Qb3xa4 33.Re4 White threatens to win material: Re4xf4 33...Qxa4 34.Qxc4 [-1.18 Rybka 2.3.2a 32-bit : 34.Rxf4 Rc8 35.Qd5 Qa1+ 36.Kh2 Qa7 37.Rxc4 Qb8+ 38.Kg1 Rd8 39.Qf3 Qb6+ 40.Kh2 Rd2 -0.28/14 ; >=34.Rxf4!? has some apparent merit 34...Rc8 35.Qd5 Qa1+ 36.Kh2=/+ ] 34...Qd1+-/+ 35.Kh2 f3 36.Rf4 fxg2 37.Kxg2 Qd2+ 38.Rf2 Qg5+ 39.Kh2 Qe5+ 40.Kg2 Kg7 41.Qb3 f5 42.c4 Qe4+ 43.Rf3 [-1.92 Rybka 2.3.2a 32-bit : 43.Kh2 Rd8 44.Qb2+ Kh6 45.Qe2 Qd4 46.Kg3 Qc5 47.Rf4 Kg7 -1.31/12 ; 43.Kh2 Rd8-/+ ] 43...g5 44.Qd3 Qxd3 45.Rxd3 Rc8 46.Rc3 Kf6 47.c5 Rc6 [47...Rc6 48.h4 gxh4-+ ] 0-1

(4) Unruh,Charles M (1739) - Baxter,Roger (1557) [A00] 64th OK Championships - Reserve (4.1), 28.06.2009 1.g3 Nf6 2.Bg2 g6 last book move 3.Nc3 Bg7 4.d3 d5 5.e4 d4 6.Nce2 0-0 7.Nf3 c5 8.0-0 Nc6 9.h3 e5 10.a3 a5 11.Bd2 Qc7 12.Qc1 Be6 13.Ng5 Bc8 14.f4 h6 15.Nf3 Kh7 16.Nh4 Ne7 17.f5 g5 18.Nf3 b5 19.g4 Ba6 20.Ng3 [-0.07 Rybka 2.3.2a 32-bit : 20.Qe1 Kg8 21.h4 b4 22.hxg5 hxg5 23.Nxg5 c4 24.axb4 axb4 25.Qg3 Nc6 0.53/11 ] 20...Nd7 [1.11 Rybka 2.3.2a 32-bit : 20...Nc6 21.Qd1 Rg8 22.Qe2 Qe7 23.a4 b4 24.b3 -0.07/11 ] 21.h4 f6 22.hxg5 c4 [3.06 Rybka 2.3.2a 32-bit : 22...hxg5 23.Bxg5 fxg5 24.Nxg5+ Kh8 25.Ne6 Qd6 26.Nh5 Rg8 27.Nhxg7 1.18/10 ] 23.g6+ Kg8 [4.01 Rybka 2.3.2a 32-bit : 23...Nxg6 24.fxg6+ Kxg6 25.Nf5 Rh8 26.N3h4+ Kf7 27.Nxg7 Kxg7 28.Bxh6+ Kf7 29.Qg5 Ke6 30.Qg7 3.08/12 ] 24.Bxh6 cxd3 25.Bxg7 Nc5 [9.22 Rybka 2.3.2a 32-bit : 25...Rf7 26.cxd3 Qxc1 27.gxf7+ Kxg7 28.Raxc1 b4 29.axb4 axb4 30.Rc7 5.24/9 ] 26.Qh6 Nxg6 27.Bxf8 [5.83 Rybka 2.3.2a 32-bit : 27.Nh5 Nf4 28.Nxf6+ Rxf6 29.Qh8+ Kf7 30.Ng5+ Ke7 31.Bxf6+ Kd7 32.Qxa8 dxc2 33.Ne6 Ncxe6 9.68/10 ] 27...Nxf8 28.Qxf6 dxc2 29.Qxe5 [3.24 Rybka 2.3.2a 32-bit : 29.Nxe5 Nb3 30.Nc6 Qg7 31.Qh4 Nxa1 32.e5 4.86/10 ] 29...Qxe5 30.Nxe5 b4 31.Rfc1 b3 32.Nf3 d3 33.Bf1 [3.25 Rybka 2.3.2a 32-bit : 33.e5 Rb8 34.Nd2 Nfd7 35.Re1 Na4 36.e6 Nf6 37.g5 4.71/12 ] 33...Rd8 34.Kf2 d2 35.Nxd2 Bxf1 [4.87 Rybka 2.3.2a 32-bit : 35...Rxd2+ 36.Ke3 Rd8 37.Bxa6 Nxa6 38.Nh5 Nc5 39.Nf6+ Kf7 40.Nd5 Na4 41.Kd4 Rc8 42.g5 2.77/15 ] 36.Ndxf1 Nd3+ 37.Ke2 Nxb2 38.Ne3 Nd3 39.Rxc2 b2 [8.74 Rybka 2.3.2a 32-bit : 39...bxc2 40.Nxc2 Ne5 41.g5 Nh7 42.g6 Nf6 43.Rb1 Rd3 44.Rb5 3.40/11 ] 40.Rb1 Nc1+ 41.Rcxc1 bxc1Q 42.Rxc1 Rb8 43.Rc6 Rb2+ 44.Kf3 a4 45.g5 Nd7 46.Kf4 [2.31 Rybka 2.3.2a 32-bit : 46.Rc8+ Nf8 47.Ng4 Rb6 48.Nh6+ Rxh6 49.gxh6 Kf7 50.Kg4 Nd7 51.Rc7 Ke8 13.99/12 ] 46...Nb6 [12.39 Rybka 2.3.2a 32-bit : 46...Rf2+ 47.Kg4 Ne5+ 48.Kh3 Nxc6 49.Nd5 Rf3 50.g6 Ne5 51.Kg2 Rb3 52.Nh5 Kf8 53.Ndf6 2.31/17 ] 47.Nd5 1-0

(5) Unruh,Charles M (1739) - Pennington,Alex (1364) [D11] 64th OK Championships - Reserve (5.1), 28.06.2009 1.g3 d5 2.Nf3 Nf6 3.Bg2 c6 4.c4 Bf5 5.d4 e6 6.Nc3 Nbd7 7.0-0 h6 8.b3 last book move 8...Ne4 9.Bb2 Nxc3 10.Bxc3 dxc4 11.bxc4 Nf6 12.Ne5 Nd7 [1.04 Rybka 2.3.2a 32-bit : 12...Bd6 13.f3 0-0 14.e4 Bh7 15.c5 Be7 16.Qd2 Nd7 17.Ba5 0.52/13 ] 13.d5 Qc7 [2.41 Rybka 2.3.2a 32-bit : 13...cxd5 14.cxd5 Rc8 15.Bd4 Nxe5 16.Bxe5 exd5 17.Bxd5 Qd7 18.e4 Bh3 19.Re1 0.87/11 ] 14.Nxd7 Qxd7 15.dxc6 Qxd1 [4.83 Rybka 2.3.2a 32-bit : 15...bxc6 16.Qxd7+ Kxd7 17.Rad1+ Kc8 18.Bxc6 Rb8 19.e4 Bh3 20.Bd7+ Kb7 21.Rfe1 Ra8 1.73/12 ] 16.Rfxd1 b6 [8.70 Rybka 2.3.2a 32-bit : 16...f6 17.cxb7 Rb8 18.Bd4 Bb4 19.Bxa7 Ke7 20.Bxb8 Rxb8 21.c5 Ba5 22.Rac1 e5 23.c6 4.95/16 ] 17.c7 Rc8 [13.88 Rybka 2.3.2a 32-bit : 17...Bd6 18.Rxd6 Rc8 19.Bxg7 Ke7 20.Rad1 Rxc7 21.Bxh8 8.85/12 ] 18.Bc6+ Ke7 19.Rd7+ 1-0