60th American Open

SwissStandard

62 players participated in this 9-round tournament, held from 25 Nov 2025 to 30 Nov 2025 in Garden Grove, CA, United States. 17 titled players from 8 federations. Top 10 Elo average was 2376, and top seed was Mark Heimann (🇺🇸 USA, GM, 2520).

Arman Mikaelyan (🇦🇲 ARM, GM, 2500) won with 7.5/9, ahead of Mark Heimann (7.0) and Ehsan Ghaem Maghami (6.5). Mikaelyan won solo starting round 4.

The biggest upset came in round 4: Zelin Fang (1765) beat Eduardo Ortiz (2239), a +474-point gap.

Location

🇺🇸Garden Grove, CA, United States

Dates

25 Nov 2025 → 30 Nov 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 9 rounds

Top seed

🇺🇸GMMark Heimann2520

Avg top 10

2,376

Participants

Titled players · 17

GM×5

IM×3

FM×1

CM×1

WGM×2

WIM×3

WFM×1

WCM×1

Federations · 8 represented

🇺🇸United States of America×47

🇨🇦Canada×2

FIDE (no federation)×2

🇦🇲Armenia×2

🇵🇭Philippines×2

🇮🇳India×1

🇵🇸Palestine×1

🇵🇪Peru×1

Top 3

🥇
GMArman Mikaelyan
🇦🇲ARM·2500
7.5pts·2570perf+8.8
🥈
GMMark Heimann
🇺🇸USA·2520
7.0pts·2483perf-1.5
🥉
GMEhsan Ghaem Maghami
🇮🇷IRI·2427
6.5pts·2396perf+0.2

How it unfolded

Top 6 · 9 rounds

GM Arman Mikaelyan led from R4; +0.5-point edge over the runner-up.

Co-leaders

Mikaelyan7.5Heimann7Ghaem Maghami6.5Bilych6.5Juksta6Tang6

R4–R9 · LEAD HELD

GM Arman Mikaelyan held the sole lead from R4 through R9 without losing it.

R7 · HEAD-TO-HEAD · WINNER VS 2ND

GM Arman Mikaelyan beat GM Mark Heimann (Black).

WIN STREAKS · 2 top finishers

GM Arman Mikaelyan 4 wins (R1–R4)GM Ehsan Ghaem Maghami 3 wins (R2–R4)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMArman Mikaelyan	*	1	½	1
2GMMark Heimann	0	*	—	—
3GMEhsan Ghaem Maghami	½	—	*	0
4IMOleksii Bilych	0	—	1	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Mikaelyan, ArmanGM	2500	ARM	+33N	+50B	+12N	+10B	=3N	+4B	+2N	=5B	=8N	7.5	47.0	50.0	40.75	2570	+8.8
2	Heimann, MarkGM	2520	USA	+44B	+48N	=5B	+11N	=6B	+13N	−1B	+17N	+10B	7.0	44.5	47.5	34.00	2483	-1.5
3	Ghaem Maghami, EhsanGM	2427	IRI	=39B	+29N	+19B	+5N	=1B	=6N	+12B	+11N	−4N	6.5	46.5	50.0	35.00	2396	+0.2
4	Bilych, OleksiiIM	2447	UKR	F	+34N	+46B	=13N	+11B	−1N	+24B	+6N	+3B	6.5	42.5	42.5	32.25	2503	+7.6
5	Tang, DylanFM	2218	USA	+57N	+18B	=2N	−3B	+9N	+10B	=6B	=1N	=7B	6.0	49.5	51.5	31.75	2377	+75.6
6	Juksta, KarolisIM	2396	LTU	=14N	+37B	+17N	+25B	=2N	=3B	=5N	−4B	+18N	6.0	46.0	50.0	31.00	2340	-3.0
7	Damaraju, Ashwin	2173	USA	+15N	+23B	−10N	=9B	+16N	+8B	−17N	+25B	=5N	6.0	44.0	48.5	32.00	2233	+33.2
8	Bitoon, RichardGM	2354	PHI	+41B	−9N	+39B	+18N	=12B	−7N	+22B	+13N	=1B	6.0	43.5	47.0	28.50	2248	-8.0
9	Munkhzul, DavaakhuuWIM	2040	MGL	+59N	+8B	−11B	=7N	−5B	+51N	+20B	=21N	+19B	6.0	40.5	42.0	25.25	2199	+37.0
10	Ouellet, Maili-JadeWGM	2314	CAN	+20B	+26N	+7B	−1N	+22B	−5N	=13B	+12N	−2N	5.5	47.0	51.5	28.25	2278	-3.2
11	Chumpitaz, AnnWIM	2233	PER	+28N	+21B	+9N	−2B	−4N	+29B	+14N	−3B	=30N	5.5	45.0	49.5	27.25	2251	+6.6
12	Gasparyan, David	2197	USA	+22B	+24N	−1B	+51N	=8N	+25B	−3N	−10B	+23N	5.5	43.5	46.0	23.50	2248	+29.2
13	Saksham RautelaIM	2316	IND	=36N	+14B	+61N	=4B	+23N	−2B	=10N	−8B	+37B	5.5	43.0	44.0	23.00	2230	-5.3
14	Mehta, Hursh	1942	USA	=6B	−13N	+56B	=54N	+27B	+46N	−11B	+24N	=17B	5.5	36.5	38.5	20.75	2206	+58.2
15	Qi, JennyWFM	1826	USA	−7B	+41N	=24B	=46N	=18B	=39N	=27B	+36N	+26B	5.5	35.5	38.5	22.25	2088	+123.6
16	Vyas, Miransh Purven	1912	USA	=54B	=44N	=48B	+26N	−7B	=19N	=46B	+41N	+21B	5.5	33.0	35.5	21.00	2134	+104.8
17	Yao, Hanchi	2150	USA	F	+49N	−6B	+39N	+19B	=30N	+7B	−2B	=14N	5.0	40.5	40.5	22.50	2234	+32.8
18	Del Pilar, Reynaldo	2017	USA	+45B	−5N	+35B	−8B	=15N	=38N	+39B	+22N	−6B	5.0	39.5	43.0	20.25	2049	+4.8
19	Porat, ToriWCM	2005	USA	+62N	+40B	−3N	=30B	−17N	=16B	+42N	+33B	−9N	5.0	38.5	38.5	16.00	2109	+43.2
20	Damaraju, Arjun	1913	USA	−10N	=32B	+58N	=21B	=33N	+40B	−9N	+46B	=25N	5.0	35.5	37.5	17.25	2131	+94.0
21	Bagdasarian, Ararat	2035	USA	+56B	−11N	=34B	=20N	=35B	+28N	=37N	=9B	−16N	4.5	38.5	40.5	18.00	1926	-50.8
22	Vichare, Ruhan Yogesh	1855	USA	−12N	+62B	+50N	+40B	−10N	+23B	−8N	−18B	=24B	4.5	37.5	37.5	13.25	2084	+93.6
23	Wang, Leo Q	1994	USA	+35B	−7N	+60B	+27N	−13B	−22N	+47B	=37N	−12B	4.5	37.0	38.5	15.00	1996	-0.8
24	Miller, Ike S	1968	USA	+60N	−12B	=15N	=52B	+34N	+50B	−4N	−14B	=22N	4.5	37.0	38.5	14.75	1962	-3.8
25	Movsisyan, Harutyun	2166	ARM	F	+42B	+36N	−6N	+48B	−12N	+41B	−7N	=20B	4.5	36.5	36.5	16.50	2105	-10.6
26	Gattani, Sarthak	2034	USA	+43N	−10B	=28N	−16B	−42N	+59B	+34N	+55B	−15N	4.5	34.5	36.0	13.75	1908	-60.0
27	Kodihalli, Kaustubh	2061	USA	F	+52B	=30N	−23B	−14N	=34B	=15N	+42B	+33N	4.5	34.0	34.0	17.00	1980	-31.6
28	Lee, Justin A	1900	USA	−11B	+45N	=26B	−48N	+31N	−21B	+40N	+51B	−29N	4.5	33.5	36.0	16.25	2051	+66.4
29	Gopalakrishnan, Kritin	1988	USA	F	−3B	+42N	+61B	=54N	−11N	−35B	+47N	+28B	4.5	30.5	30.5	13.25	2062	+26.4
30	Tarjan, JamesGM	2240	USA	+47B	=46N	=27B	=19N	F	=17B	F	+35N	=11B	4.5	30.0	30.0	18.50	2131	-7.4
31	Paramzina, AnastasyaWGM	2148	FID	−34B	=53N	=49B	=38N	−28B	=43B	+57N	=39N	+51B	4.5	27.5	29.5	12.75	1875	-59.0
32	Coy, Matthew	1813	USA	−48B	=20N	−41B	=44N	+49B	−47N	=59B	+58N	+39B	4.5	26.5	28.0	13.50	1961	+32.8
33	Mallela, Abhishek	1957	USA	−1B	=56N	+53B	=34N	=20B	=35N	+38B	−19N	−27B	4.0	36.5	38.5	14.00	1895	-16.6
34	Santhosh, Pranav	1825	USA	+31N	−4B	=21N	=33B	−24B	=27N	−26B	+60N	=46N	4.0	36.0	37.5	14.00	1978	+65.6
35	Fang, Zelin	1765	USA	−23N	+57B	−18N	+58B	=21N	=33B	+29N	−30B	F	4.0	31.0	31.0	12.75	2025	+98.0
36	Sherwood, Forest J	1918	USA	=13B	+54N	−25B	F	−50N	=52B	+43N	−15B	+40N	4.0	30.5	30.5	13.50	2059	+49.6
37	Li, Brian Borui	1941	USA	F	−6N	−54B	+53N	+45B	+60N	=21B	=23B	−13N	4.0	30.5	30.5	12.00	2037	+31.2
38	Lad, Neil	1898	USA	−40N	−43B	+59N	=31B	+55N	=18B	−33N	+49B	F	4.0	27.5	27.5	11.75	1967	+25.6
39	Cooke, Eric	1950	USA	=3N	+58B	−8N	−17B	+61N	=15B	−18N	=31B	−32N	3.5	39.0	40.0	11.25	2000	+5.4
40	Rohwer, Paul	2225	USA	+38B	−19N	+47B	−22N	=51B	−20N	−28B	+45N	−36B	3.5	33.5	36.0	11.75	1825	-171.2
41	Hutton, Jesse	1939	USA	−8N	−15B	+32N	=43B	+62N	F	−25N	−16B	+55N	3.5	32.0	32.0	8.75	1898	-24.4
42	Yang, Jon	1889	USA	F	−25N	−29B	+56N	+26B	=48N	−19B	−27N	+47B	3.5	31.0	31.0	11.00	1962	+28.0
43	Arul, Sharvesh	1796	USA	−26B	+38N	−51B	=41N	=47B	=31N	−36B	=52N	=53B	3.5	28.5	31.0	12.00	1854	+23.2
44	Zhang, Glenn	1965	USA	−2N	=16B	−52N	=32B	−60N	−49B	=56N	+57B	+59B	3.5	28.0	29.5	9.50	1814	-78.4
45	Joseph, Veronique	1791	USA	−18N	−28B	+57N	=55B	−37N	=61B	=49N	−40B	+58B	3.5	26.5	27.5	7.25	1890	+37.2
46	Xia, Joshua	2009	USA	F	=30B	−4N	=15B	+52N	−14B	=16N	−20N	=34B	3.0	39.0	39.0	12.25	1899	-54.4
47	Moussa, AlaaeddineCM	1903	PLE	−30N	+59B	−40N	=60B	=43N	+32B	−23N	−29B	−42N	3.0	30.0	31.5	8.50	1820	-22.6
48	Utiatskaja, IrinaWIM	2074	FID	+32N	−2B	=16N	+28B	−25N	=42B	F	F	F	3.0	29.5	29.5	13.50	2026	-9.0
49	Chan, Skylor T	1887	USA	F	−17B	=31N	−50B	−32N	+44N	=45B	−38N	+60B	3.0	29.5	29.5	9.00	1862	-16.0
50	Neal, James	2071	USA	+53B	−1N	−22B	+49N	+36B	−24N	F	F	F	3.0	26.0	26.0	9.50	1985	-15.2
51	Cui, Young Cheung	1930	USA	F	F	+43N	−12B	=40N	−9B	+60B	−28N	−31N	2.5	29.0	29.0	6.75	1906	-14.0
52	Bupeshnath, Arjun	1822	USA	F	−27N	+44B	=24N	−46B	=36N	−55B	=43B	F	2.5	26.5	26.5	9.50	1843	+5.2
53	Chang, Kyle	1812	USA	−50N	=31B	−33N	−37B	−58N	=56B	F	+61B	=43N	2.5	24.0	24.0	6.00	1828	-0.6
54	Sam, Gabriel	2250	USA	=16N	−36B	+37N	=14B	=29B	F	F	F	F	2.5	23.5	23.5	11.75	1940	-36.0
55	Akopian, Robert	1900	USA	F	F	F	=45N	−38B	+62B	+52N	−26N	−41B	2.5	18.0	18.0	4.25	1819	-14.0
56	Yi, Victor	1805	USA	−21N	=33B	−14N	−42B	−57N	=53N	=44B	=59N	F	2.0	27.0	27.0	5.75	1718	-36.0
57	Sun, Charlie	1878	USA	−5B	−35N	−45B	=59N	+56B	=58N	−31B	−44N	F	2.0	27.0	27.0	3.75	1775	-49.6
58	Ortiz, Eduardo	2239	PHI	F	−39N	−20B	−35N	+53B	=57B	=61N	−32B	−45N	2.0	26.0	26.0	4.00	1674	-104.2
59	Chen, Leo H	1809	USA	−9B	−47N	−38B	=57B	F	−26N	=32N	=56B	−44N	1.5	29.5	29.5	4.25	1666	-54.4
60	Flavin, Finnegan	1753	USA	−24B	F	−23N	=47N	+44B	−37B	−51N	−34B	−49N	1.5	29.0	29.0	5.00	1676	-28.4
61	Lu, Karson	1823	CAN	F	F	−13B	−29N	−39B	=45N	=58B	−53N	F	1.0	24.0	24.0	2.75	1725	-33.6
62	Bronshtein, Marc	1773	USA	−19B	−22N	F	F	−41B	−55N	F	F	F	0.0	18.0	18.0	0.00	1125	-48.4

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Qi, JennyWFMUSA
+123.6
5.5 pts · #14
2Vyas, Miransh PurvenUSA
+104.8
5.5 pts · #12
3Fang, ZelinUSA
+98.0
4.0 pts · #35

Top rating losers

1Rohwer, PaulUSA
-171.2
3.5 pts · #42
2Ortiz, EduardoPHI
-104.2
2.0 pts · #57
3Zhang, GlennUSA
-78.4
3.5 pts · #39

Biggest upsets

R4+474 Elo gap
Fang, Zelin1765 beat Ortiz, Eduardo2239
R9+448 Elo gap
Joseph, Veronique1791 beat Ortiz, Eduardo2239
R8+426 Elo gap
Coy, Matthew1813 beat Ortiz, Eduardo2239