57th Annual Atlantic Open - Major

SwissStandard

47 players participated in this 5-round tournament, held from 22 Aug 2025 to 24 Aug 2025 in Washington, DC, United States. 16 titled players from 7 federations. Top 10 Elo average was 2375, and top seed was Jianchao Zhou (🇺🇸 USA, GM, 2584).

Jianchao Zhou (🇺🇸 USA, GM, 2584) won with 4.5/5, ahead of Francesco Sonis (4.5) and Jamison Edrich Kao (4.0). Zhou shared the lead from round 4, winning on tie-break.

The biggest upset came in round 3: Benjamin Amrany (1942) beat Vaibhav Kalpaka (FM, 2317), a +375-point gap.

Location

🇺🇸Washington, DC, United States

Dates

22 Aug 2025 → 24 Aug 2025

Time control

Standard: 40 Moves in 80 Min. Del. 30 Sec. / / 30 Min. Del. 30 Sec.

System

Swiss · 5 rounds

Top seed

🇺🇸GMJianchao Zhou2584

Avg top 10

2,375

Participants

Titled players · 16

GM×5

IM×1

FM×4

CM×3

WFM×2

WCM×1

Federations · 7 represented

🇺🇸United States of America×41

🇮🇳India×1

🇮🇹Italy×1

🇨🇦Canada×1

🇨🇳China×1

🇮🇱Israel×1

🇨🇺Cuba×1

Top 3

🥇
GMJianchao Zhou
🇺🇸USA·2584
4.5pts·2612perf+2.0
🥈
GMFrancesco Sonis
🇮🇹ITA·2567
4.5pts·2623perf+2.8
🥉
CMJamison Edrich Kao
🇺🇸USA·2081
4.0pts·2330perf+59.2

How it unfolded

Top 6 · 5 rounds

Tight race until R5; 2 players tied at 4.5/5, decided on Buchholz. Title race narrowed from 4 co-leaders at R4 to 2 at the finish.

Co-leaders

Sonis4.5Zhou4.5Amrany4Kao4Poliannikov3.5Moorhouse3.5

R5 · TIEBREAK CLUSTER

2 players finish on 4.5/5. Zhou takes the title on Buchholz Cut1 (11.0).

WIN STREAKS · 3 top finishers

GM Francesco Sonis 3 wins (R3–R5)GM Jianchao Zhou 4 wins (R2–R5)Benjamin Amrany 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMFrancesco Sonis	*	—	—	—
2GMJianchao Zhou	—	*	1	—
3Benjamin Amrany	—	0	*	—
4CMJamison Edrich Kao	—	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	Pts	Bu C1	Bu	SB	Perf	Δ
1	Zhou, JianchaoGM	2584	USA	=11N	+45B	+37N	+4N	+5B	4.5	11.0	11.5	10.25	2612	+2.0
2	Sonis, FrancescoGM	2567	ITA	+16B	=22N	+14B	+40N	+6B	4.5	10.5	11.5	10.50	2623	+2.8
3	Kao, Jamison EdrichCM	2081	USA	+13B	−5N	+21B	+8N	+24B	4.0	11.0	13.0	9.50	2330	+59.2
4	Amrany, Benjamin	1942	USA	+17B	+30N	+31N	−1B	+28N	4.0	10.5	12.0	7.50	2372	+102.4
5	Balakrishnan, PraveenGM	2494	USA	+15N	+3B	+10N	=6B	−1N	3.5	15.0	17.5	11.25	2411	-2.7
6	Poliannikov, DanilaFM	2351	USA	+36B	+21N	+8B	=5N	−2N	3.5	13.0	14.0	7.75	2381	+8.4
7	Moorhouse, Will	2014	USA	+32B	−8N	+17B	=26N	+12B	3.5	10.0	11.5	7.50	2172	+40.8
8	Hebbar, EshaanIM	2196	USA	+44N	+7B	−6N	−3B	+23N	3.0	13.0	13.5	6.00	2118	-11.5
9	Zhuang, Kyle	2121	USA	=12N	+11B	−27N	+19B	=29B	3.0	9.5	11.5	7.25	1977	-33.1
10	Shangin, Lev	2186	USA	+39B	+43N	−5B	=29N	=14B	3.0	9.0	9.5	3.75	2065	-23.2
11	Pendse, Vihaan	1919	USA	=1B	−9N	=25B	+21N	=18B	2.5	12.0	14.0	6.50	2039	+26.4
12	Deng, Michael	1872	USA	=9B	+42N	−24B	+30N	−7N	2.5	10.0	10.5	3.50	2026	+40.0
13	Zhang, Jiemin	1859	CHN	−3N	=16N	+42B	=37B	=20N	2.5	10.0	10.5	3.50	1979	+36.1
14	Sridhar, Jagadeeshwar Yehamandram	1925	USA	F	+34B	−2N	+41B	=10N	2.5	10.0	10.0	4.00	2103	+30.4
15	Kandikayala, Srikar	1930	USA	−5B	+32N	−18B	+25N	=37N	2.5	9.5	10.5	4.00	1998	+14.0
16	Kennedy, Aiden	1863	USA	−2N	=13B	+33N	+38B	F	2.5	9.5	9.5	3.75	2109	+47.6
17	Aiken, Richard	1928	USA	−4N	+44B	−7N	=42B	+38N	2.5	9.0	9.5	1.75	1968	+5.4
18	Morella Cabrera, Julio AntonioFM	2141	CUB	−21B	+33B	+15N	−31B	=11N	2.5	8.5	10.0	5.25	1997	-18.0
19	Doddapaneni, Viyaan Krishna	1861	USA	−30B	=36N	+46B	−9N	+43B	2.5	6.0	6.5	1.50	1951	+20.5
20	Kornilov, Sergey	1989	USA	F	F	+47N	+34N	=13B	2.5	4.0	4.0	2.75	2145	+21.6
21	Joseph, Alexander	1879	USA	+18N	−6B	−3N	−11B	+42N	2.0	12.5	13.0	3.00	2010	+28.4
22	Levine, Owen	1933	USA	+25N	=2B	−40N	−28B	=41N	2.0	9.5	10.5	4.75	1977	+2.8
23	Jandhyala, Yegna Sairam	1904	USA	=33N	+38B	=26B	−24N	−8B	2.0	8.5	9.5	2.75	2030	+19.0
24	Srivastava, Vikram	2058	USA	F	F	+12N	+23B	−3N	2.0	8.5	8.5	4.50	2078	+1.6
25	Gilbert, Walker W	1733	USA	−22B	=39N	=11N	−15B	+36B	2.0	8.0	9.0	2.75	1826	+23.2
26	Paragua, Megan AltheaFM	2300	USA	F	F	=23N	=7B	+27N	2.0	7.5	7.5	4.75	2070	-13.4
27	Stancil, Kimani	1916	USA	F	+46N	+9B	−35N	−26B	2.0	7.0	7.0	3.50	2184	+24.0
28	Slate, KentCM	2124	USA	F	F	+36B	+22N	−4B	2.0	7.0	7.0	3.00	2052	-10.8
29	Martin, Zachary	1953	USA	F	F	+43B	=10B	=9N	2.0	6.5	6.5	3.50	2154	+15.6
30	Sherman, David	1948	USA	+19N	−4B	=41N	−12B	F	1.5	10.0	10.0	3.00	1764	-20.2
31	Vaibhav KalpakaFM	2317	IND	F	F	−4B	+18N	=35B	1.5	8.0	8.0	3.25	2135	-12.6
32	Sathiesh, Kavin C	1819	USA	−7N	−15B	F	=36N	+39B	1.5	8.0	8.0	1.50	1826	0.0
33	Weber, MadelineWCM	1941	USA	=23B	−18N	−16B	F	+44N	1.5	7.5	7.5	1.50	1860	-9.6
34	Kaiser, Marshall Philip	1792	USA	=46B	−14N	+45N	−20B	F	1.5	6.0	6.0	0.75	1871	+7.2
35	Fedorowicz, JohnGM	2321	USA	F	F	F	+27B	=31N	1.5	3.5	3.5	2.75	2312	+0.7
36	ONeill, Noah Thomas	1908	USA	−6N	=19B	−28N	=32B	−25N	1.0	10.0	11.5	2.00	1729	-24.2
37	Schenk, Sam	1972	USA	F	F	−1B	=13N	=15B	1.0	9.5	9.5	2.50	1920	-6.4
38	Xu, Zhihan (samuel)CM	2015	CAN	F	−23N	+39B	−16N	−17B	1.0	8.0	8.0	1.00	1682	-62.6
39	Zhou, Alexander Zheng	1804	USA	−10N	=25B	−38N	=45B	−32N	1.0	7.5	8.0	1.25	1694	-28.1
40	Baron, TalGM	2432	ISR	F	F	+22B	−2B	F	1.0	6.5	6.5	2.00	2300	-2.4
41	Meadors, Landon	1725	USA	F	F	=30B	−14N	=22B	1.0	6.0	6.0	1.75	1810	+12.0
42	Chong, Hanford	1989	USA	F	−12B	−13N	=17N	−21B	0.5	9.5	9.5	1.25	1557	-84.0
43	Mallik, Shivam	1780	USA	F	−10B	−29N	=44B	−19N	0.5	8.0	8.0	0.25	1647	-24.0
44	Ananth, AnanyaWFM	1880	USA	−8B	−17N	F	=43N	−33B	0.5	7.5	7.5	0.25	1639	-44.8
45	Wang, LaceyWFM	1919	USA	F	−1N	−34B	=39N	F	0.5	7.0	7.0	0.50	1699	-36.4
46	Clancy, Daniel	1997	USA	=34N	−27B	−19N	F	F	0.5	6.0	6.0	0.75	1584	-31.0
47	Lin, Benjamin	1989	USA	F	F	−20B	F	F	0.0	2.5	2.5	0.00	1189	-20.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Amrany, BenjaminUSA
+102.4
4.0 pts · #3
2Kao, Jamison EdrichCMUSA
+59.2
4.0 pts · #4
3Kennedy, AidenUSA
+47.6
2.5 pts · #12

Top rating losers

1Chong, HanfordUSA
-84.0
0.5 pts · #43
2Xu, Zhihan (samuel)CMCAN
-62.6
1.0 pts · #41
3Ananth, AnanyaWFMUSA
-44.8
0.5 pts · #46

Biggest upsets

R3+375 Elo gap
Amrany, Benjamin1942 beat FMVaibhav Kalpaka2317
R1+262 Elo gap
Joseph, Alexander1879 beat FMMorella Cabrera, Julio Antonio2141
R3+205 Elo gap
Stancil, Kimani1916 beat Zhuang, Kyle2121