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美国青年锦标赛第4轮结束

2014年美国青年锦标赛于6月19日～29日在美国圣路易斯举行，10位棋手进行9轮大循环比赛。第4轮比赛结束，Xiong积2.5分领先,Troff和Harmon-Vellotti同积3分并列第2～3位。

比赛官方站点    http://www.uschesschamps.com/ 
比赛现场直播站点   http://www.chessdom.com/2014-u-s-junior-championship-live/

ch-USA Junior 2014 Saint Louis USA (USA), 19-29 vi 2014 cat. V (2361) 
                                      1 2 3 4 5 6 7 8 9 0  
1. Xiong, Jeffrey          m USA 2437 * . . 1 1 . . ? . 1 3? 2626 
2. Troff, Kayden W         m USA 2494 . * . ? . ? . . 1 1 3  2561 
3. Harmon-Vellotti, Luke   m USA 2412 . . * . 0 . . 1 1 1 3  2488 
4. Ostrovskiy, Aleksandr A m USA 2423 0 ? . * ? 1 . . . . 2  2364 
5. Colas, Joshua             USA 2247 0 . 1 ? * . . ? . . 2  2358 
6. Williams, Justus D      f USA 2278 . ? . 0 . * ? . 1 . 2  2437 
7. Bodek, Michael H        f USA 2389 . . . . . ? * 1 0 ? 2  2302 
8. Larson, Matthew W         USA 2160 ? . 0 . ? . 0 * . . 1  2178 
9. Sevian, Samuel          m USA 2442 . 0 0 . . 0 1 . * . 1  2200 
10. Shen, Arthur           f USA 2331 0 0 0 . . . ? . . * ?  2111

Round 1 (June 20, 2014) 
Xiong, Jeffrey - Ostrovskiy, Aleksandr A 1-0 36 C02 French Advance 
Colas, Joshua - Harmon-Vellotti, Luke 1-0 38 A46 Queen's Pawn Opening 
Larson, Matthew W - Bodek, Michael H 0-1 46 E00 Catalan 
Sevian, Samuel - Williams, Justus D 0-1 36 B50 Sicilian Defence 
Shen, Arthur - Troff, Kayden W 0-1 43 D85 Gruenfeld Defence 
Round 2 (June 21, 2014) 
Xiong, Jeffrey - Colas, Joshua 1-0 48 B40 Sicilian Classical 
Troff, Kayden W - Sevian, Samuel 1-0 29 D30 Queen's Gambit (without Nc3) 
Harmon-Vellotti, Luke - Larson, Matthew W 1-0 39 B90 Sicilian Najdorf Variation 
Ostrovskiy, Aleksandr A - Williams, Justus D 1-0 42 B48 Sicilian Paulsen 
Bodek, Michael H - Shen, Arthur 1/2 44 B90 Sicilian Najdorf Variation 
Round 3 (June 22, 2014) 
Colas, Joshua - Ostrovskiy, Aleksandr A 1/2 30 D00 Queen's Pawn Game 
Williams, Justus D - Troff, Kayden W 1/2 46 A07 Barcza System 
Larson, Matthew W - Xiong, Jeffrey 1/2 115 D70 Gruenfeld Defence 
Sevian, Samuel - Bodek, Michael H 1-0 72 A04 Dutch System 
Shen, Arthur - Harmon-Vellotti, Luke 0-1 48 C04 French Tarrasch 
Round 4 (June 23, 2014) 
Xiong, Jeffrey - Shen, Arthur 1-0 41 B52 Sicilian Rossolimo 
Harmon-Vellotti, Luke - Sevian, Samuel 1-0 62 C67 Ruy Lopez Berlin 
Ostrovskiy, Aleksandr A - Troff, Kayden W 1/2 32 B52 Sicilian Rossolimo 
Colas, Joshua - Larson, Matthew W 1/2 38 D11 Slav Defence 
Bodek, Michael H - Williams, Justus D 1/2 50 B53 Sicilian Hungarian

作者叶红《国际象棋通报》14-06-25