US Championship: Caruana takes sole lead again

by André Schulz
4/21/2016 – After five of eleven rounds the players had a free day at the US Championship in St. Louis but then round six brought a top encounter: Wesley So played with White against Hikaru Nakamura. The game ended in a draw and that gave Fabiano Caruana, who had White against Alexander Onischuk, the chance to take sole lead again. Which he did with a nice trick in the endgame.
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The round starts


In the top encounter of the sixth round Hikaru Nakamura had Black against Wesley So and after 1.e4 tried a popular line of the Steinitz Variation in the French. So had a slight initiative but after a small inaccuracy all his chances were gone and the game soon ended in a draw.

 
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1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3 Be7 8.Qd2 0-0 8...b6!? 9.dxc5 9.0-0-0? c4 with an attack. 9.Be2 a6 e.g. 10.0-0 b5 11.Kh1 Qc7 12.a3 Bb7 13.Rad1 Rac8 14.Qe1 cxd4 15.Nxd4 Nxd4 16.Bxd4 Bc5 17.Qh4 Bxd4 18.Rxd4 f6 19.Bd3 h6 20.exf6 Rxf6 21.f5 Rcf8 22.Rg1 Nc5 23.fxe6 Nxe6 24.Rg4 Nf4 25.Qg3 Qe7 26.Rxf4 Rxf4 27.Ne2 Rf1 28.Nd4 Rxg1+ 29.Kxg1 Re8 30.h4 Qe1+ 31.Kh2 Qxg3+ 32.Kxg3 Kf7 33.Kf2 Kf6 34.g3 Bc8 35.c3 Bg4 36.Bc2 g5 37.hxg5+ hxg5 38.Bb3 Ke5 39.Bc2 Rf8+ 40.Kg2 Bd7 41.Nf3+ Kf6 42.Bb3 g4 43.Nd4 Ke5 44.Bc2 a5 45.Bd1 Ke4 0-1 (45) Karjakin, S (2720) -Carlsen,M (2810) Wijk aan Zee 2010 9...Nxc5 10.0-0-0 a6 11.Qf2 b6 The young German GM Matthias Blübaum played this line a couple of times. 11...Qa5 12.Nd4 12.f5 Ra7 13.Qg3 Kh8 14.Be2 Rd7 15.fxe6 Nxe6 16.Nd4 Ncxd4 17.Bxd4 Bc5 18.Bg1 Bb7 19.Bf3 d4 20.Ne4 Be7 21.h4 b5 22.Ng5 Bxf3 23.Nxf3 d3 24.cxd3 Rxd3 25.Bh2 Qd5 26.Qe1 Rxd1+ 27.Qxd1 Qxa2 0-1 (27) Jarmula,L (2395)-Bluebaum,M (2589) Karpacz 2015 12...Qc7 13.Kb1 Bb7 14.Nxc6 Bxc6 15.Bd4 Bb7 16.Bd3 b5 17.Ne2 b4 17...Rac8 18.Bxc5 Qxc5= After 18...Bxc5?! 19.Qh4 g6 19...h6 20.g4 20.Qg3 Rfe8 21.h4 White's prospects on the kingside seem to be promising: h5 22.Qh3 Kg7 23.g4 Rh8 24.gxh5 Rxh5 25.Ng3 Rh6 26.Qg4± 18.Ng3 18.Bxc5 Qxc5= 18...Rac8 19.f5
19...f6!? Defuses White's slight initiative. Perhaps 19...Nxd3 20.Rxd3 f6 was more precise. 20.exf6 Bxf6 21.Bxc5?! After 21.fxe6!? a5 after 21...Nxe6? 22.Qf5 Ng5 23.Bxf6 gxf6 24.Qg4 Kh8 25.Qxb4+- White wins a pawn and has a good position. 22.Rhe1 White is slightly better. 21...Qxc5 22.Qxc5 Rxc5 23.fxe6 Re8 24.Rde1 g6 25.Rhf1 Kg7 26.Rf4 a5 27.Rg4 Kh8 28.Bxg6!? So is trying. hxg6 29.Rxg6 Be7 30.Nf5 d4 31.g4 a4 32.b3 a3 33.Rh6+ Kg8 34.Rg6+ Kh8 35.Rh6+ Kg8 36.Rg6+ ½–½
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WhiteEloWBlackEloBResYearECOEventRnd
So,W2773Nakamura,H2787½–½2016C11ch-USA 20166.1

 

So against Nakamura

Wesley So

Fabiano Caruana was well prepared against Alexander Onischuk's Arkhangelsk variation and chose a line which had been tried in a number of correspondence game. After the opening Caruana was better but he won the game with a nice tactical trick in the endgame.

 
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1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Bc5 The Arkhangelsk variation is a specialty of Onischuk. More common is 5...b5 6.Bb3 Bc5 7.c3 d6 6.c3 b5 7.Bc2 d5!? Black wants to exploit the fact that White's bishop is on c2 and not on b3. 7...d6 8.d4 Bb6 is another possibility that is often played. 8.a4 The main line is 8.d4 dxe4 9.Nxe5 Nxe5 10.dxe5 Qxd1 11.Rxd1 Ng4 12.Bxe4 Nxf2 13.Bc6+ Ke7 14.Rd5 Bb6 15.Bxa8 Nd3+ 16.Kf1 Nxc1 17.Na3 Be6 18.Rxc1 with a well-known position which occurred in almost 30 games of the Megadatabase. One example is Rxa8 19.Rd3 Bf5 20.Rdd1 Be3 21.Ra1 Bf4 1/2-1/2 (78) Shirov,A (2751)-Onischuk,A (2637) Germany 2000 8.exd5 Qxd5 9.d4 exd4 10.Re1+ Be7 11.cxd4 Bg4 does nothing to pose Black problems. 8...dxe4 After 8...Bb7 9.exd5 Qxd5 White has 10.d4 which is good for him: exd4 11.axb5 axb5 12.Rxa8+ Bxa8 13.Re1+ Be7 14.cxd4 0-0 15.Nc3 Qd7 16.Nxb5± and White is a pawn up. 9.axb5 Bg4 10.bxc6 10.Bxe4 Nxe4 11.bxc6 0-0 12.d4 exd4 13.cxd4 Bb6 14.Nc3 Re8 15.Be3 Qd6 16.d5 Bxe3 17.fxe3 Rad8 18.Rxa6 Nxc3 19.bxc3 Qxd5 20.Qxd5 Rxd5 21.Nd4 g6 22.Rf4 Bf5 23.Ra7 Rxe3 24.c4 Rc5 25.Rxc7 Re4 26.Rxe4 Bxe4 27.Re7 Bf5 28.c7 Kf8 29.Nxf5 gxf5 30.Rd7 Kg7 31.Rd4 Rxc7 32.Kf2 Kf6 33.Ke3 Ke6 34.g3 f6 35.Kd3 Ra7 36.Kc3 Ke5 37.Rh4 Rb7 38.Rf4 Rb1 39.Rf2 Rc1+ 40.Kb4 Ke6 41.Kb5 Kd6 42.Rxf5 Rb1+ 43.Ka4 Rb2 44.Rxf6+ Kc5 45.Rh6 Kxc4 46.Rh4+ Kd5 47.Rxh7 Ke5 48.Ka3 Rb8 49.Rh5+ Kf6 50.Rh4 Kg5 51.Rb4 Rh8 52.h4+ Kh5 53.Rb5+ Kh6 54.g4 Re8 55.Rb4 Kg6 56.Rb6+ Kf7 57.Rb7+ Ke6 58.Rh7 Rb8 59.g5 Kf5 60.Rh6 Ke5 61.h5 Kf5 62.g6 Kf6 63.Rh7 Rg8 64.Kb3 1-0 (64) Anand,V (2762)-Shirov,A (2746) New Delhi/Teheran 2000 10...exf3 11.gxf3 Be6 12.Ra5 Qd6 13.f4 e4 14.d4 exd3 15.Qxd3 0-0 16.Qxd6 Bxd6 17.Rd1
After the complications are over White is a pawn up. And though White's structure on the kingside is shattered the pawn f4 will later play an important role. 17...Bg4 Here a correspondence game continued with 17...Rfe8 18.Be3 Bg4 19.Rxd6 cxd6 20.Nd2 Be6 21.c4 Bh3 22.Nf3 Rab8 23.b3 d5 24.c5 Ne4 25.Bxe4 dxe4 26.Nd4 Ra8 27.f5 f6 28.c7 g6 29.b4 gxf5 30.Bf4 Kh8 31.Ra3 Rg8+ 32.Rg3 h5 33.f3 e3 34.Bxe3 f4 35.Bxf4 h4 36.Rxg8+ Kxg8 37.Kf2 Re8 38.Ne2 Kf7 39.Nc3 Bc8 40.Nd5 Ke6 41.Nb6 Kf5 42.Bd6 Kg5 43.c6 Kf5 44.Bc5 Kg6 45.f4 Bh3 46.Nc4 Rc8 47.Bb6 1-0 (47) Voiculescu,C (2565)-Gavrilakis,N (2475) ICCF email 2009 18.Rd4 Bf3 19.Ba4 Rfe8 20.Be3 Ne4 21.Bd1 Bxd1 22.Rxd1 Rab8 More stubborn was 22...Reb8 23.b4 Bf8 24.Kh1 Nd6± 23.Nd2 Rxb2? The engines propose 23...g5!? as an attempt to get counterplay: 24.fxg5 Rxb2 25.Nxe4 Rxe4 and after e.g. 26.Rxa6 Black can try to stir the waters with Bxh2+ However, White is still better. 27.Kh1± 27.Kxh2? Rxe3 After 23...Nxd2 24.Rxd2 Ra8 White simply plays 25.b4+- 24.Nxe4 Rxe4
25.Re5! A fine move that exploits Black's back rank weakness and wins material. After 25.Rxa6 Re8 things would be fine for Black. 26.c4 Rc2 27.c5 Bxc5 28.Bxc5 Rxc5 29.Rd7 Re1+ 29...Rc8? 30.Rxc7 30.Kg2 g6 31.Rxc7 Re6= 25...Rxe3 26.fxe3 Rb8 26...Bf8 27.Rd8 g6 28.Ree8+- 27.Ra5 Kf8 28.c4 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Caruana,F2795Onischuk,A26641–02016C78ch-USA 20166.2

In a duel "Experience vs Youth" 48-year old Alexander Shabalov, who played against Sam Shankland, showed that he still is a force to reckon with. Shabalov first won the exchange and then the game.

Gata Kamsky and Ray Robson drew as did Varuzhan Akobian and Aleksandr Lenderman. Jeffrey Xiaong also switched back to drawing mode. He played against Akshat Chandra and this battle of the young also ended in a draw.

Results of round six

Br. Tit Name Coun ELO Ergebnis Titel Name Coun ELO
1 GM Wesley So
 
 2773 ½ - ½ GM Hikaru Nakamura
 
 2790
2 GM Fabiano Caruana
 
 2794 1 - 0 GM Alexander Onischuk
 
 2664
3 GM Gata Kamsky
 
 2667 ½ - ½ GM Ray Robson
 
 2663
4 IM Akshat Chandra
 
 2501 ½ - ½ GM Jeffery Xiong
 
 2588
5 GM Samuel L Shankland
 
 2648 0 - 1 GM Alexander Shabalov
 
 2520
6 GM Varuzhan Akobian
 
 2610 ½ - ½ GM Aleksandr Lenderman
 
 2623

Games of rounds 1 to 6

 
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1.e4 d5 2.exd5 Nf6 3.Bb5+ Bd7 4.Bc4 Bg4 5.f3 Bf5 6.Nc3 Nbd7 7.g4 Nb6 8.b3 Bc8 9.Bb2 Nfxd5 10.Nxd5 Nxd5 11.Qe2 e6 12.0-0-0 b6 13.Nh3 Bb7 14.f4 Bd6 15.f5 Qe7 16.Bxg7 Rg8 17.Bb2 0-0-0 18.Rhf1 Rde8 19.f6 Qf8 20.g5 h6 21.Rg1 hxg5 22.Nxg5 Rh8 23.h3 Rh6 24.Rdf1 a5 25.Kb1 Kb8 26.Rg4 Rd8 27.h4 Ka7 28.Be5 Rd7 29.Bb5 Rd8 30.Bxd6 cxd6 31.Bc4 Nc7 32.Nxf7 Qxf7 33.Rg7 Qf8 34.Rxc7 Rxf6 35.Rxf6 Qxf6 36.Qxe6 Qxh4 37.Bd5 Rb8 38.Qf7 Qe1+ 39.Kb2 Qe5+ 40.c3 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Caruana,F2795Akobian,V26151–02016B01ch-USA 20161.1
Nakamura,H2787Lenderman,A26181–02016D43ch-USA 20161.2
So,W2773Kamsky,G26781–02016C95ch-USA 20161.3
Shankland,S2656Chandra,A24771–02016C07ch-USA 20161.4
Onischuk,A2664Xiong,J2618½–½2016D20ch-USA 20161.5
Shabalov,A2528Robson,R26630–12016D43ch-USA 20161.6
Caruana,F2795Shankland,S26561–02016C19ch-USA 20162.1
Kamsky,G2678Nakamura,H2787½–½2016A45ch-USA 20162.2
Chandra,A2477So,W27730–12016B12ch-USA 20162.3
Robson,R2663Onischuk,A26641–02016A46ch-USA 20162.4
Akobian,V2615Xiong,J2618½–½2016D83ch-USA 20162.5
Lenderman,A2618Shabalov,A2528½–½2016D45ch-USA 20162.6
So,W2773Caruana,F2795½–½2016A35ch-USA 20163.1
Xiong,J2618Robson,R2663½–½2016D00ch-USA 20163.2
Nakamura,H2787Chandra,A2477½–½2016A13ch-USA 20163.3
Shankland,S2656Akobian,V26151–02016C10ch-USA 20163.4
Shabalov,A2528Kamsky,G2678½–½2016A05ch-USA 20163.5
Onischuk,A2664Lenderman,A26181–02016D10ch-USA 20163.6
Caruana,F2795Nakamura,H27871–02016B90ch-USA 20164.1
Shankland,S2656So,W2773½–½2016D37ch-USA 20164.2
Akobian,V2615Robson,R2663½–½2016D45ch-USA 20164.3
Kamsky,G2678Onischuk,A2664½–½2016A45ch-USA 20164.4
Lenderman,A2618Xiong,J2618½–½2016D83ch-USA 20164.5
Chandra,A2477Shabalov,A2528½–½2016B19ch-USA 20164.6
Shabalov,A2528Caruana,F2795½–½2016A07ch-USA 20165.1
So,W2773Akobian,V26151–02016C10ch-USA 20165.2
Robson,R2663Lenderman,A2618½–½2016A07ch-USA 20165.3
Nakamura,H2787Shankland,S26561–02016B11ch-USA 20165.4
Xiong,J2618Kamsky,G26781–02016B03ch-USA 20165.5
Onischuk,A2664Chandra,A24771–02016E32ch-USA 20165.6
So,W2773Nakamura,H2787½–½2016C11ch-USA 20166.1
Caruana,F2795Onischuk,A26641–02016C78ch-USA 20166.2
Kamsky,G2678Robson,R2663½–½2016D43ch-USA 20166.3
Chandra,A2477Xiong,J2618½–½2016E15ch-USA 20166.4
Shankland,S2656Shabalov,A25280–12016B90ch-USA 20166.5
Akobian,V2615Lenderman,A2618½–½2016D31ch-USA 20166.6

With 5.0/6 Fabiano Caruana took the sole lead again. Wesley So and Ray Robson follow half a point behind while Hikaru Nakamura still suffers from his loss against Caruana.

Standings after six rounds

Women's Tournament

In round six of the Women's Tournament five games were decided and only one ended in a draw. Tournament leader Nazi Paikidze had a good position against Carissa Yip but missed a possible win. This allowed Tatev Abrahamyan and Irina Krush to catch up to her. Anna Zatonskih also won and now is half a point behind the three leaders.

Carissa Yip

Results of round six

Br. Tit Name Coun ELO Ergebnis Titel Name Coun ELO
1   Carissa Yip
 
 2109 ½ - ½ IM Nazi Paikidze
 
 2346
2 WGM Tatev Abrahamyan
 
 2324 1 - 0 WGM Sabina Francesca Foisor
 
 2258
3 FM Akshita Gorti
 
 2242 0 - 1 GM Irina Krush
 
 2458
4 WIM Agata Bykovtsev
 
 2176 0 - 1 IM Anna Zatonskih
 
 2469
5 WFM Jennifer R Yu
 
 2102 0 - 1 WGM Katerina Nemcova
 
 2367
6 WIM Ashritha Eswaran
 
 2149 1 - 0 FM Alisa Melekhina
 
 2205

 

Games of rounds 1 to 6

 
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1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 0-0 7.0-0 c6 8.Qc2 b6 9.b3 Ne4 10.Bf4 Bb7 11.Ne5 f6 12.Nd3 Na6 13.Nd2 f5 14.Be5 Nb4 15.Nxb4 Bxb4 16.Nxe4 fxe4 17.f3 exf3 18.exf3 Qe7 19.c5 bxc5 20.a3 Ba5 21.dxc5 Ba6 22.Rf2 Rad8 23.Qb2 Bc7 24.Bxc7 Qxc7 25.Re1 Rfe8 26.f4 d4 27.Re5 d3 28.Rd2 Rb8 29.Qc3 Qb7 30.b4 Qd7 31.Be4 Rbd8 32.Kg2 Re7 33.Rh5 g6 34.Re5 Bb5 35.h4 Qd4 36.Qxd4 Rxd4 37.Kf2 a5 38.bxa5 Kf7 39.h5 Ra7 40.Ke3 Ra4 41.hxg6+ hxg6 42.Rg5 R4xa5 43.Rxg6 Rxa3 44.Rh6 R7a4 45.Rh7+ Kg8 46.Rd7 Rc4 47.R2xd3 Rxd3+ 48.Bxd3 Rc3 49.Ke4 Bxd3+ 50.Rxd3 Rxc5 51.Rd7 Kf8 52.g4 Rd5 53.Rc7 Rc5 54.Kd4 Rd5+ 55.Ke3 Rc5 56.Ke4 Ke8 57.g5 Kf8 58.g6 Rf5 59.Rxc6 Rf6 60.Ke5 Rf5+ 61.Ke4 Rf6 62.Ke5 Rf5+ 63.Kxe6 Rxf4 64.Rc7 Kg8 65.Ke5 Rf1 ½–½
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WhiteEloWBlackEloBResYearECOEventRnd
Paikidze,N2346Zatonskih,A2470½–½2016D02ch-USA w 20161.1
Nemcova,K2367Krush,I2465½–½2016B47ch-USA w 20161.2
Abrahamyan,T2342Bykovtsev,A22191–02016B90ch-USA w 20161.3
Foisor,S2258Melekhina,A2205½–½2016B39ch-USA w 20161.4
Yu,J2157Eswaran,A2225½–½2016A18ch-USA w 20161.5
Yip,C2164Gorti,A21841–02016C04ch-USA w 20161.6
Abrahamyan,T2342Yu,J21571–02016B90ch-USA w 20162.1
Eswaran,A2225Yip,C21640–12016B92ch-USA w 20162.2
Zatonskih,A2470Nemcova,K2367½–½2016E10ch-USA w 20162.3
Krush,I2465Foisor,S22581–02016A07ch-USA w 20162.4
Gorti,A2184Paikidze,N23460–12016D45ch-USA w 20162.5
Bykovtsev,A2219Melekhina,A22051–02016B27ch-USA w 20162.6
Yip,C2164Abrahamyan,T2342½–½2016C03ch-USA w 20163.1
Melekhina,A2205Krush,I2465½–½2016B00ch-USA w 20163.2
Paikidze,N2346Eswaran,A22251–02016A46ch-USA w 20163.3
Foisor,S2258Zatonskih,A2470½–½2016E14ch-USA w 20163.4
Nemcova,K2367Gorti,A21840–12016C06ch-USA w 20163.5
Yu,J2157Bykovtsev,A2219½–½2016E62ch-USA w 20163.6
Abrahamyan,T2342Paikidze,N2346½–½2016B06ch-USA w 20164.1
Yu,J2157Yip,C21641–02016A16ch-USA w 20164.2
Bykovtsev,A2219Krush,I24650–12016B88ch-USA w 20164.3
Zatonskih,A2470Melekhina,A22051–02016A58ch-USA w 20164.4
Gorti,A2184Foisor,S22580–12016D37ch-USA w 20164.5
Eswaran,A2225Nemcova,K2367½–½2016C41ch-USA w 20164.6
Krush,I2465Zatonskih,A2470½–½2016D35ch-USA w 20165.1
Paikidze,N2346Yu,J21571–02016B91ch-USA w 20165.2
Nemcova,K2367Abrahamyan,T2342½–½2016C15ch-USA w 20165.3
Yip,C2164Bykovtsev,A22190–12016B99ch-USA w 20165.4
Foisor,S2258Eswaran,A2225½–½2016A46ch-USA w 20165.5
Melekhina,A2205Gorti,A21840–12016C02ch-USA w 20165.6
Yip,C2164Paikidze,N2346½–½2016B12ch-USA w 20166.1
Abrahamyan,T2342Foisor,S22581–02016C84ch-USA w 20166.2
Gorti,A2184Krush,I24650–12016D38ch-USA w 20166.3
Bykovtsev,A2219Zatonskih,A24700–12016C05ch-USA w 20166.4
Yu,J2157Nemcova,K23670–12016A25ch-USA w 20166.5
Eswaran,A2225Melekhina,A22051–02016C77ch-USA w 20166.6

 

Standings after six rounds

Photos: Tournament page...

André Schulz started working for ChessBase in 1991 and is an editor of ChessBase News.

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