70th Iowa Open Championship

Open SwissStandard

56 players participated in this 5-round tournament, held from 06 Sept 2025 to 07 Sept 2025 in Iowa City, IA, United States. 2 titled players from 5 federations. Top 10 Elo average was 2106, and top seed was Hikaru Nakamura (🇺🇸 USA, GM, 2807).

Hikaru Nakamura (🇺🇸 USA, GM, 2807) won with 5.0/5, ahead of Anjaneya Sripathy Rao (4.0) and Luke O Hengen (4.0). Nakamura won solo starting round 4.

The biggest upset came in round 4: Vivaan Parameswaran (1469) beat Tim Crouse (1884), a +415-point gap.

Location

🇺🇸Iowa City, IA, United States

Dates

06 Sept 2025 → 07 Sept 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 5 rounds

Top seed

🇺🇸GMHikaru Nakamura2807

Avg top 10

2,106

Participants

Titled players · 2

GM×1

CM×1

Federations · 5 represented

🇺🇸United States of America×48

🇺🇿Uzbekistan×1

🇮🇳India×1

🇺🇦Ukraine×1

🇧🇦Bosnia and Herzegovina×1

Top 3

🥇
GMHikaru Nakamura
🇺🇸USA·2807
5.0pts·3207perf+4.0
🥈
CMAnjaneya Sripathy Rao
🇺🇸USA·2147
4.0pts·2228perf+22.0
🥉
Luke O Hengen
🇺🇸USA·1896
4.0pts·2071perf+36.0

How it unfolded

Top 6 · 5 rounds

GM Hikaru Nakamura led from R4; +1.0-point edge over the runner-up.

Co-leaders

Nakamura5Rao4Hengen4Aimdilokwong4Weatherspoon3.5Kosokin3.5

R4–R5 · LEAD HELD

GM Hikaru Nakamura never relinquished the lead after R4; final gap +1.0 over the runner-up.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

GM Hikaru Nakamura beat CM Anjaneya Sripathy Rao (Black).

WIN STREAKS · 2 top finishers

GM Hikaru Nakamura 5 wins (R1–R5)CM Anjaneya Sripathy Rao 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMHikaru Nakamura	*	1	—	—
2CMAnjaneya Sripathy Rao	0	*	—	—
3Luke O Hengen	—	—	*	½
4Alec D Aimdilokwong	—	—	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	Pts	Bu C1	Bu	SB	Perf	Δ
1	Nakamura, HikaruGM	2807	USA	+17B	+13N	+5B	+2N	+12B	5.0	13.5	16.5	16.50	3207	+4.0
2	Rao, Anjaneya SripathyCM	2147	USA	+30N	+11B	+6N	−1B	+23N	4.0	14.5	17.0	12.00	2228	+22.0
3	Hengen, Luke O	1896	USA	+31B	=16N	+8B	+19B	=4N	4.0	13.0	15.0	11.50	2071	+36.0
4	Aimdilokwong, Alec D	2017	USA	+21N	=20B	+41N	+7B	=3B	4.0	12.5	14.0	10.75	2076	+10.0
5	Zagar, Dane	1950	USA	+37N	+14B	−1N	+15B	=7N	3.5	14.5	16.5	9.75	2166	+26.4
6	Weatherspoon, Kyler	1970	USA	+25B	+33N	−2B	+18N	=10B	3.5	13.0	15.0	9.25	2055	+11.8
7	Kosokin, Valeriy	2143	UZB	+50B	+15N	+35B	−4N	=5B	3.5	12.5	13.5	7.75	2089	-5.8
8	Logozar, Elijah	1937	USA	+56N	+22B	−3N	=16B	+19N	3.5	12.0	12.0	6.50	1881	-5.8
9	Gurumoorthi, Gurugrahan	1931	USA	+32B	=19N	+24B	−12N	+14N	3.5	11.0	13.0	8.75	1995	+17.5
10	Lodh, Anish	1894	USA	=26N	=40B	+21N	+27B	=6N	3.5	11.0	12.5	8.75	1831	-4.6
11	Nixon, Niko	1834	USA	+49B	−2N	=25B	+41N	+22B	3.5	10.5	11.5	6.25	1882	+8.8
12	Khanbutaev, Artemii	2099	USA	F	+27B	+20N	+9B	−1N	3.0	13.5	13.5	8.50	2192	+18.8
13	Pikus, Matthew	1919	USA	+39B	−1B	−19N	+46N	+31B	3.0	11.5	12.5	5.00	1245	-15.6
14	Baranovskyi, Volodymyr	1900	UKR	+46B	−5N	+31B	+35N	−9B	3.0	11.0	12.0	5.00	1824	-12.0
15	Pregon, Joseph	1885	USA	+47B	−7B	+40N	−5N	+32B	3.0	10.5	11.5	4.50	1835	-3.8
16	Seetharaman, Rakshith	1786	USA	+53N	=3B	F	=8N	+28B	3.0	10.5	10.5	6.75	1892	+19.2
17	Darr, Benjamin	1915	USA	−1N	+36B	+48N	F	+20B	3.0	10.5	10.5	5.50	2008	+7.2
18	Reynolds, Robert	1962	USA	+34N	=45B	=23N	−6B	+38N	3.0	10.0	11.5	6.00	1812	-12.0
19	Zulic, Jasmin	1771	USA	+54N	=9B	+13B	−3N	−8B	2.5	14.0	14.0	4.75	1834	+6.0
20	Deering, Ryan	1814	USA	+29B	=4N	−12B	+25N	−17N	2.5	12.5	15.0	7.00	1855	+2.6
21	Kmetz, Shawn Douglas	0	USA	−4B	+29N	−10B	+55N	=24B	2.5	12.5	12.5	3.75	1604	0.0
22	Turba, Timur	1690	USA	+28B	−8N	+39B	=33N	−11N	2.5	11.5	13.5	5.50	1671	-5.6
23	Jing, Aaron C	1843	USA	+36N	F	=18B	+32N	−2B	2.5	11.0	11.0	5.50	1938	+10.2
24	McCrea, Ryan A	1719	USA	=40N	+26B	−9N	=37B	=21N	2.5	10.5	12.0	5.50	1741	+2.4
25	Pennell, Andrew	1737	USA	−6N	+46B	=11N	−20B	+48N	2.5	10.5	11.5	3.75	1600	-18.8
26	Popov, Sergey	1720	USA	=10B	−24N	+44B	−31N	+51B	2.5	9.5	10.5	4.25	1715	-0.2
27	Joseph, Veronique	1751	USA	+48B	−12N	+49B	−10N	=33B	2.5	9.5	10.5	3.00	1752	-3.8
28	Parameswaran, Vivaan	1469	USA	−22N	=42B	+36N	+50B	−16N	2.5	9.0	10.0	3.75	1706	+55.6
29	Durai Murugan, Thirukkumaran	0	USA	−20N	−21B	=34N	+42B	+40N	2.5	8.5	10.0	4.00	1680	0.0
30	Jayam, Srikar	1745	USA	−2B	=47N	+43B	+51N	F	2.5	7.5	7.5	3.00	1886	+18.4
31	Sigl, Cade	0	USA	−3N	+53B	−14N	+26B	−13N	2.0	12.5	13.0	3.00	1666	0.0
32	Sama, Advaith Reddy	1743	USA	−9N	+34B	+52N	−23B	−15N	2.0	11.0	12.0	3.00	1686	-10.8
33	Ohly, Oliver	1790	USA	+38N	−6B	F	=22B	=27N	2.0	10.5	10.5	4.50	1678	-18.0
34	Sabarish, Shravan	0	USA	−18B	−32N	=29B	+43N	=41B	2.0	9.0	10.5	3.50	1646	0.0
35	Shen, Edward	1966	USA	+42N	+52B	−7N	−14B	F	2.0	9.0	9.0	2.50	1891	-14.4
36	Bhargava, Anay	1519	USA	−23B	−17N	−28B	+54N	+47B	2.0	9.0	9.0	1.00	942	-31.2
37	Linscott, John	1808	USA	−5B	=43N	+47B	=24N	F	2.0	8.5	8.5	3.00	1634	-13.8
38	Ajoykumar, Aarud	0	USA	−33B	−50N	+53B	+39N	−18B	2.0	8.0	8.5	2.50	1079	0.0
39	Ebersole, Jake	0	USA	−13N	+54B	−22N	−38B	+55N	2.0	7.5	7.5	0.00	1004	0.0
40	Ravuthu Shravanth Naidu	1510	IND	=24B	=10N	−15B	=47N	−29B	1.5	11.5	12.5	3.50	1708	+23.6
41	FIDE 39917177	0	—	F	+44N	−4B	−11B	=34N	1.5	11.0	11.0	2.50	1126	0.0
42	Veeder, Cole	1663	USA	−35B	=28N	−51B	−29N	+46B	1.5	8.0	9.0	2.25	1382	-43.2
43	Desai, Ayaan Dhaval	1607	USA	−52N	=37B	−30N	−34B	+54N	1.5	7.5	7.5	1.00	1530	-9.6
44	FIDE 39992462	0	—	F	−41B	−26N	=53N	+49B	1.5	5.5	5.5	1.25	1647	0.0
45	Thangavel, Gokul	1998	USA	+55B	=18N	F	F	F	1.5	3.0	3.0	1.50	1962	-1.0
46	FIDE 39992535	0	—	−14N	−25N	+54B	−13B	−42N	1.0	10.0	10.0	0.00	1005	0.0
47	Durai Murugan, Kavinvel	0	USA	−15N	=30B	−37N	=40B	−36N	1.0	9.5	11.0	2.00	1453	0.0
48	Sena, Ethan	0	USA	−27N	F	−17B	+49N	−25B	1.0	9.0	9.0	1.00	1551	0.0
49	Adduri, Mansi	1574	USA	−11N	+55B	−27N	−48B	−44N	1.0	8.5	8.5	0.00	993	-18.0
50	Crouse, Tim	1884	USA	−7N	+38B	F	−28N	F	1.0	8.0	8.0	2.00	1014	-44.0
51	Hengen, Clover	1532	USA	F	F	+42N	−30B	−26N	1.0	6.5	6.5	1.50	1584	+7.6
52	Eichhorn, George	1857	USA	+43B	−35N	−32B	F	F	1.0	5.5	5.5	1.50	1647	-16.4
53	Biswas, Avidha	0	USA	−16B	−31N	−38N	=44B	F	0.5	8.5	8.5	0.75	986	0.0
54	Sabarish, Shashwath	0	USA	−19B	−39N	−46N	−36B	−43B	0.0	8.0	9.0	0.00	833	0.0
55	FIDE 39978664	0	—	−45N	−49N	F	−21B	−39B	0.0	7.0	7.0	0.00	986	0.0
56	Tahirovic, Saban	0	BIH	−8B	F	F	F	F	0.0	3.5	3.5	0.00	1137	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Parameswaran, VivaanUSA
+55.6
2.5 pts · #9
2Hengen, Luke OUSA
+36.0
4.0 pts · #7
3Zagar, DaneUSA
+26.4
3.5 pts · #6

Top rating losers

1Crouse, TimUSA
-44.0
1.0 pts · #49
2Veeder, ColeUSA
-43.2
1.5 pts · #43
3Bhargava, AnayUSA
-31.2
2.0 pts · #50

Biggest upsets

R4+415 Elo gap
Parameswaran, Vivaan1469 beat Crouse, Tim1884
R3+148 Elo gap
Zulic, Jasmin1771 beat Pikus, Matthew1919
R3+131 Elo gap
Hengen, Clover1532 beat Veeder, Cole1663