17th Annual Golden State Open - U2100

Open SwissStandard

127 players participated in this 7-round tournament, held from 16 Jan 2026 to 19 Jan 2026 in Concord, CA, United States. 8 federations represented. Top 10 Elo average was 1935, and top seed was Esther Jou (🇺🇸 USA, 2006).

Rudy Jr. Tia (🇵🇬 PNG, 1798) won with 5.0/7, ahead of Liwei Yang (5.0) and Hector Viadiu-Ilarraza (5.0). Tia shared the lead from round 5, winning on tie-break.

The biggest upset came in round 6: Zack Schuster (1681) beat Aaron Gindi (1999), a +318-point gap.

Location

🇺🇸Concord, CA, United States

Dates

16 Jan 2026 → 19 Jan 2026

Time control

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

System

Swiss · 7 rounds

Top seed

🇺🇸Esther Jou2006

Avg top 10

1,935

Participants

127

Federations · 8 represented

🇺🇸United States of America×119

🇵🇬Papua New Guinea×1

FIDE (no federation)×1

🇵🇷Puerto Rico×1

🇯🇵Japan×1

🇨🇳China×1

🇷🇺Russia×1

🇮🇩Indonesia×1

Top 3

🥇
Rudy Jr. Tia
🇵🇬PNG·1798
5.0pts·1887perf+17.0
🥈
Liwei Yang
🇨🇳CHN·1689
5.0pts·1888perf+36.8
🥉
Hector Viadiu-Ilarraza
🇺🇸USA·1774
5.0pts·1924perf+28.2

How it unfolded

Top 6 · 7 rounds

Tight race until R7; 4 players tied at 5.0/7, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 4 at the finish.

Co-leaders

Viadiu-Ilarraza5Yang5Jeyaraj5Tia5Rigel4.5Yenamandra4.5

R7 · TIEBREAK CLUSTER

4 players finish on 5.0/7. Tia takes the title on Buchholz Cut1 (22.0).

WIN STREAKS · 2 top finishers

Hector Viadiu-Ilarraza 3 wins (R2–R4)Joel Ethan Jeyaraj 4 wins (R3–R6)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Hector Viadiu-Ilarraza	*	—	—	—
2Liwei Yang	—	*	—	0
3Joel Ethan Jeyaraj	—	—	*	—
4Rudy Jr. Tia	—	1	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Tia, Rudy Jr.	1798	PNG	+2B	+81N	−42B	+44N	+23B	=6N	=41B	5.0	22.0	24.0	17.25	1887	+17.0
2	Yang, Liwei	1689	CHN	−1N	+61B	+87N	=5B	+39N	+22B	=48N	5.0	21.5	23.0	14.25	1888	+36.8
3	Viadiu-Ilarraza, Hector	1774	USA	=11N	+21B	+75N	+39B	=7N	−15B	+85N	5.0	21.0	23.0	14.75	1924	+28.2
4	Jeyaraj, Joel Ethan	1713	USA	F	=10B	+26N	+14B	+90N	+12B	=64N	5.0	19.5	19.5	16.25	1991	+81.6
5	Zhang, Sean	1776	USA	+74B	=28N	=63B	=2N	+17B	=24N	=8B	4.5	23.0	25.0	15.50	1794	+10.8
6	Admassu, Yonathan	1749	USA	+54B	+38N	+40B	−41N	+18B	=1B	−16N	4.5	22.0	24.5	15.00	1877	+24.4
7	Yenamandra, Srinadh	1678	USA	+124B	+23N	+78B	=16N	=3B	=48B	−18N	4.5	21.5	21.5	11.50	1931	+94.8
8	Tam, Ivan	1748	USA	−38N	=54B	+45N	+75B	+21N	=10B	=5N	4.5	20.5	22.5	14.00	1734	-3.2
9	Rigel, Marlon	1737	USA	F	F	+57N	+73B	+82N	+13B	=15N	4.5	14.5	14.5	12.50	2141	+45.0
10	Miller, Theodore	1633	USA	=29B	=4N	+89B	+25N	=50B	=8N	−82B	4.0	21.5	23.0	13.00	1812	+66.8
11	DB, Pranav	1585	USA	=3B	+27N	−39B	=43N	+80B	+23N	−102N	4.0	20.0	21.5	13.00	1864	+85.1
12	Verma, Vedant	1860	USA	+111B	+26N	+55B	−42N	+67B	−4N	−40B	4.0	19.5	20.5	9.50	1714	-44.8
13	Cruz, Armin Vale	1825	USA	−26B	+122N	+74B	+19N	+96B	−9N	−24B	4.0	19.0	19.0	7.50	1725	-17.4
14	Yu, Shuugo	1669	USA	+125N	−22B	+76B	−4N	+54B	−29N	+107B	4.0	17.5	17.5	5.50	1674	+1.2
15	Marvin, Hayes Alexander	1902	USA	F	F	+114B	=50N	+40B	+3N	=9B	4.0	16.5	16.5	12.75	2023	+29.6
16	Chalissery, Neil	1923	USA	F	F	+43B	=7B	=49N	+95N	+6B	4.0	16.5	16.5	12.75	1943	+2.4
17	Dhanasekar, Rakshita	1753	USA	F	=87B	+109N	=32B	−5N	+73B	+21N	4.0	16.0	16.0	9.00	1817	+20.8
18	Cawthon, Jeremy David	1908	USA	F	F	+101B	+24B	−6N	+123N	+7B	4.0	14.0	14.0	9.50	1881	-1.6
19	Raghav, Surya	1697	USA	F	+88B	=120N	−13B	=55N	+56B	+60N	4.0	13.5	13.5	8.00	1806	+35.6
20	Goel, Darsh	1712	USA	F	F	+94B	+106N	−35B	+83N	+80B	4.0	10.0	10.0	6.50	2421	+60.8
21	Schuster, Zack	1681	USA	=25B	−3N	+112B	+27N	−8B	+39N	−17B	3.5	23.5	24.5	9.25	1768	+15.4
22	Xu, Olivia	1608	USA	+126B	+14N	−41B	+47N	=63B	−2N	−36B	3.5	21.0	21.0	8.25	1662	+21.2
23	Krishnan, Sreyshthaa	1767	USA	+76N	−7B	+77N	+100B	−1N	−11B	=75N	3.5	19.5	21.0	6.50	1631	-50.0
24	Brahmanapally, Sarvagnya	1670	USA	F	F	+29B	−18N	+32N	=5B	+13N	3.5	19.5	19.5	13.25	1983	+82.8
25	Sevall, Daniel	1851	USA	=21N	+65B	=47N	−10B	−77N	=45B	+73N	3.5	18.0	20.0	9.25	1662	-68.8
26	Vuluvala, Ritvik	1701	FID	+13N	−12B	−4B	=89N	=83B	=115N	+113B	3.5	17.5	18.5	7.25	1694	-2.4
27	Ho, Michael	1724	USA	F	−11B	+88N	−21B	=45N	+38B	+77N	3.5	17.0	17.0	8.00	1673	-7.2
28	Liu, Serena	1764	USA	+118B	=5B	F	−40N	=73N	+55B	=51N	3.5	15.5	15.5	7.75	1786	+8.4
29	Melville, Cailen	1773	USA	=10N	+79B	−24N	+91N	F	+14B	F	3.5	15.0	15.0	9.50	1788	+2.0
30	Overton, Owen R	1598	USA	−55B	=59N	=68B	−108N	+87B	=46N	+54B	3.5	14.5	15.5	8.00	1556	-8.2
31	Cheng, Kar Lun	1660	USA	=106N	=73B	+93N	=58B	−34N	=76B	=70N	3.5	14.0	15.0	6.50	1600	-8.6
32	Ziatdinov, Albert	1894	RUS	F	F	+84B	=17N	−24B	+107N	+47B	3.5	13.5	13.5	8.00	1791	-20.4
33	Chin, Zee	1856	USA	F	F	−117N	+79B	+58N	+49B	=42N	3.5	11.5	11.5	9.00	1814	-9.2
34	Clemens, Kristian	1876	USA	F	F	+51N	F	+31B	=63N	+78B	3.5	11.0	11.0	9.75	2026	+10.8
35	Iyer, Nikita	0	USA	F	F	+71B	+57B	+20N	=90B	F	3.5	10.5	10.5	9.75	1713	0.0
36	Rajaram, Adit	1683	USA	F	F	−60B	+87N	+98N	=102B	+22N	3.5	10.5	10.5	7.25	1853	+44.4
37	Gutta, Anirudh	1609	USA	F	F	−56B	=71N	+94N	+88B	+55N	3.5	10.5	10.5	6.75	1714	+28.0
38	Gao, Albert	1633	USA	+8B	−6B	=66N	=114N	−43B	−27N	+74B	3.0	20.0	21.0	8.25	1633	-0.8
39	Gindi, Aaron	1999	USA	+122B	F	+11N	−3N	−2B	−21B	+56N	3.0	20.0	20.0	6.50	1667	-89.2
40	Nguyen, Alex	1980	USA	F	F	−6N	+28B	−15N	+43B	+12N	3.0	19.0	19.0	10.50	1873	-26.0
41	Ma, Matthew	1619	USA	F	F	+22N	+6B	=69N	−64B	=1N	3.0	18.0	18.0	11.75	1803	+49.6
42	Naga Abhi Ram Ponnaluri	1659	USA	F	F	+1N	+12B	−64N	=69B	=33B	3.0	17.5	17.5	12.00	1875	+57.6
43	Dixit, Raajas Kunal	1728	USA	F	+106B	−16N	=11B	+38N	−40N	=57B	3.0	17.5	17.5	7.25	1709	-7.6
44	Rao, Arjun	1781	USA	F	+45B	=46N	−1B	+91N	−85B	=76N	3.0	16.5	16.5	7.00	1700	-25.6
45	Mo, Kayden Pak	1629	USA	F	−44N	−8B	+118N	=27B	=25N	+97B	3.0	16.5	16.5	5.50	1733	+32.8
46	Rao, Anjali	1613	USA	F	+92N	=44B	−48B	−99N	=30B	+62N	3.0	15.0	15.0	7.25	1735	+38.8
47	Shenvi Priolkar, Ansh	1680	USA	F	+110N	=25B	−22B	=56N	+112B	−32N	3.0	15.0	15.0	5.00	1657	-7.2
48	Martinez, Enoch	1845	USA	F	F	−95B	+46N	+123B	=7N	=2B	3.0	14.0	14.0	7.75	1722	-30.4
49	Harish, Vidyuth	1688	USA	F	F	+108B	+55N	=16B	−33N	=101B	3.0	12.5	12.5	6.25	1762	+20.0
50	Selvam, Swagatha	1767	USA	+107N	F	+52B	=15B	=10N	F	F	3.0	12.0	12.0	8.00	1849	+12.8
51	Zhang, Matthew	1652	USA	F	F	−34B	=83N	+89B	+113N	=28B	3.0	11.5	11.5	5.25	1753	+27.2
52	Gao, Ethan Wangchen	1636	USA	F	F	−50N	=103B	+53N	=96B	+99N	3.0	10.5	10.5	6.00	1811	+48.0
53	Macharla, Vasisht	1674	USA	F	F	+86B	+84N	−52B	−57N	+111B	3.0	10.5	10.5	5.00	1698	+7.2
54	Jonnalagada, Navaneet Vishnusai	1567	USA	−6N	=8N	+92B	=66B	−14N	=62B	−30N	2.5	21.5	23.0	6.25	1593	+7.6
55	Agdamag, Samuel	1600	USA	+30N	+116B	−12N	−49B	=19B	−28N	−37B	2.5	21.5	22.5	6.50	1608	0.0
56	Saligram, Ayaan	1608	USA	F	F	+37N	+97B	=47B	−19N	−39B	2.5	15.0	15.0	6.50	1712	+23.6
57	Liu, Scott Yixuan	1586	USA	F	F	−9B	−35N	+119N	+53B	=43N	2.5	14.5	14.5	5.00	1713	+20.4
58	Bhosale, Arnav	1726	USA	F	F	+80B	=31N	−33B	−60N	+59B	2.5	14.0	14.0	6.25	1712	-2.8
59	Amin, Eshaan Kashyap	1504	USA	−116N	=30B	−79N	=92N	+93B	=65B	−58N	2.5	13.5	14.5	5.25	1498	-2.4
60	Doshi, Ansh Ankit	1769	USA	F	F	+36N	−90B	=100N	+58B	−19B	2.5	13.0	13.0	6.75	1694	-20.8
61	Aher, Sandesh	1570	USA	−81B	−2N	+122B	=74N	−75N	=121B	=91N	2.5	13.0	13.0	2.00	1512	-19.6
62	Nishida, Eito	1714	JPN	=110B	=89N	−91B	−111N	+72B	=54N	−46B	2.5	12.0	13.0	5.00	1474	-91.6
63	Sripada, Vishnu	1684	USA	F	F	=5N	+120B	=22N	=34B	F	2.5	12.0	12.0	6.25	1855	+36.4
64	Jimenez, Reduard Tengco	1703	USA	F	F	F	F	+42B	+41N	=4B	2.5	11.0	11.0	8.50	1937	+33.2
65	Ploquin, Phil	1694	USA	F	−25N	+110B	F	−78B	=59N	+98B	2.5	10.5	10.5	3.75	1650	-5.4
66	Tran, Toby	1633	USA	F	F	=38B	=54N	+115B	−82N	=103B	2.5	10.0	10.0	4.50	1641	-1.6
67	Lagumbay, Charles	0	USA	F	F	+107B	+78N	−12N	=99B	−96N	2.5	10.0	10.0	3.75	1682	0.0
68	Navaneetha Prabhu, Arjunsai	1490	USA	F	F	=30N	−77B	−97N	+87B	+109N	2.5	9.5	9.5	4.25	1598	+29.2
69	Maokhampio, Lucas	1797	USA	F	F	+90N	=95B	=41B	=42N	F	2.5	9.0	9.0	5.25	1769	-6.4
70	Thekkoot, Darsh	0	USA	F	F	−100B	−81N	+110B	+108N	=31B	2.5	9.0	9.0	3.75	1633	0.0
71	Mudaliar, Vedant	1571	USA	F	F	−35N	=37B	+118B	+92N	F	2.5	9.0	9.0	3.75	1967	+59.6
72	Hua, Joshua	1593	USA	F	F	=118N	=88B	−62N	=93N	+121B	2.5	6.5	6.5	2.25	1519	-12.0
73	Rasyid, Hamdanil	1653	INA	F	=31N	+81B	−9N	=28B	−17N	−25B	2.0	21.0	21.0	5.50	1642	-3.2
74	Guan, Marcus	1538	USA	−5N	+118B	−13N	=61B	−76N	=106B	−38N	2.0	17.0	17.5	2.25	1502	-16.8
75	Sundar, Neal	1510	USA	F	F	−3B	−8N	+61B	=103N	=23B	2.0	17.0	17.0	5.00	1660	+34.8
76	Bogi, Yudhin	1557	USA	−23B	F	−14N	F	+74B	=31N	=44B	2.0	16.0	16.0	5.25	1611	+12.4
77	Nadan, Avinesh	1667	FIJ	F	F	−23B	+68N	+25B	−78N	−27B	2.0	15.0	15.0	6.00	1648	-2.8
78	Martinez, Abraham	1765	USA	F	F	−7N	−67B	+65N	+77B	−34N	2.0	15.0	15.0	4.50	1729	-8.0
79	Wang, Angela Zixi	1621	USA	F	−29N	+59B	−33N	−113B	=89N	=112B	2.0	13.0	13.0	3.75	1510	-37.2
80	Perlov, Daniel	1770	USA	F	F	−58N	+109B	−11N	+91B	−20N	2.0	13.0	13.0	2.50	1579	-26.0
81	Poling, Scott	1834	USA	+61N	−1B	−73N	+70B	F	F	F	2.0	12.0	12.0	5.00	1549	-22.2
82	Steger, Eric	1909	USA	F	F	F	F	−9B	+66B	+10N	2.0	11.0	11.0	6.50	1793	-7.8
83	Aetukuri, Gautam Chowdary	1621	USA	F	F	+119B	=51B	=26N	−20B	F	2.0	11.0	11.0	3.75	1563	-9.2
84	Kayal, Rishan	1679	USA	F	F	−32N	−53B	=88N	=109B	+106N	2.0	10.0	10.0	2.25	1577	-28.8
85	Jou, Esther	2006	USA	F	F	F	F	+108B	+44N	−3B	2.0	9.0	9.0	4.00	1845	-9.8
86	Gu, Thomas	1601	USA	F	F	−53N	=94B	F	=104N	+89B	2.0	7.5	7.5	3.00	1594	-1.6
87	Chen, Felix Y	1519	USA	F	=17N	−2B	−36B	−30N	−68N	+119B	1.5	19.0	19.0	2.50	1277	-48.0
88	Wang, Yulan	1500	USA	=92B	−19N	−27B	=72N	=84B	−37N	−93B	1.5	17.0	18.5	3.00	1483	-6.0
89	Wang, Matthew	1576	USA	F	=62B	−10N	=26B	−51N	=79B	−86N	1.5	17.0	17.0	4.00	1461	-34.8
90	Kulkarni, Advit Amod	1743	USA	F	F	−69B	+60N	−4B	=35N	F	1.5	13.5	13.5	4.25	1635	-16.8
91	Yan, Rayna	1599	USA	F	F	+62N	−29B	−44B	−80N	=61B	1.5	13.5	13.5	3.75	1573	-7.2
92	Castro Diaz, Felix	1754	PUR	=88N	−46B	−54N	=59B	=109N	−71B	F	1.5	13.0	13.0	2.50	1371	-118.4
93	Sinha, Ishaan	0	USA	F	F	−31B	−98N	−59N	=72B	+88N	1.5	11.5	11.5	2.75	1437	0.0
94	Mythil, Arnav	1546	USA	F	F	−20N	=86N	−37B	+118N	F	1.5	10.0	10.0	1.50	1573	+4.8
95	Krishnan, Shreyank	1673	USA	F	F	+48N	=69N	F	−16B	F	1.5	9.5	9.5	4.25	1855	+28.4
96	Rajaram, Raghu	1732	USA	F	F	F	F	−13N	=52N	+67B	1.5	9.5	9.5	4.00	1538	-10.0
97	Jiang, Richard	1577	USA	F	F	F	−56N	+68B	=98B	−45N	1.5	9.5	9.5	3.25	1513	-15.2
98	Zhu, Aiden	1673	USA	F	F	F	+93B	−36B	=97N	−65N	1.5	9.0	9.0	2.25	1378	-43.6
99	Grigorev, Mikhail	1719	USA	F	F	F	F	+46B	=67N	−52B	1.5	8.5	8.5	4.25	1625	-10.8
100	Amin, Aida	1619	USA	F	F	+70N	−23N	=60B	F	F	1.5	8.5	8.5	3.75	1576	-4.0
101	Biswas, Rishan	1475	USA	F	F	−18N	F	F	+105B	=49N	1.5	8.5	8.5	3.00	1773	+41.2
102	Kane, Kevin	1950	USA	F	F	F	F	F	=36N	+11B	1.5	7.5	7.5	5.75	1827	-4.4
103	Cheng, Luke D	1801	USA	F	F	F	=52N	F	=75B	=66N	1.5	7.5	7.5	3.75	1593	-31.6
104	Sharma, Shivam Saran	1578	USA	F	F	F	F	F	=86B	+108B	1.5	3.0	3.0	2.00	1793	+22.4
105	Liu, Michael	1757	USA	F	F	F	F	+127N	−101N	=115B	1.5	2.5	2.5	0.50	1515	-24.0
106	Ni, Tao	1549	USA	=31B	−43N	F	−20B	F	=74N	−84B	1.0	14.5	14.5	2.75	1423	-14.4
107	Fredericks, Paul	0	USA	−50B	F	−67N	+110N	F	−32B	−14N	1.0	14.0	14.0	1.00	1503	0.0
108	Khurana, Viyaan	1598	USA	F	F	−49N	+30B	−85N	−70B	−104N	1.0	12.5	12.5	3.50	1523	-19.6
109	Sayiner, Necip	1631	USA	F	F	−17B	−80N	=92B	=84N	−68B	1.0	12.0	12.0	1.75	1449	-21.8
110	Whitaker, Robert D	1455	USA	=62N	−47B	−65N	−107B	−70N	=119B	F	1.0	12.0	12.0	1.50	1423	-2.0
111	Garbouz, Igor	1630	USA	−12N	F	F	+62B	F	F	−53N	1.0	9.5	9.5	2.50	1624	-1.2
112	Wills, Daniel	1528	USA	F	F	−21N	F	=114B	−47N	=79N	1.0	9.5	9.5	1.50	1467	-11.6
113	Ramaswamy, Pudur	1570	USA	F	F	F	F	+79N	−51B	−26N	1.0	8.5	8.5	2.00	1533	-2.8
114	Pramod, Pranavi	1659	USA	F	F	−15N	=38B	=112N	F	F	1.0	8.0	8.0	2.00	1563	-16.8
115	Ramesh, Harshit	0	USA	F	F	F	F	−66N	=26B	=105N	1.0	7.5	7.5	2.50	1572	0.0
116	Oshima, Daniel	1753	USA	+59B	−55N	F	F	F	F	F	1.0	5.0	5.0	2.50	1552	-10.2
117	Turaga, Varun Karthik	1630	USA	F	F	+33B	F	F	F	F	1.0	3.5	3.5	3.50	2656	+31.6
118	Li, Joylin	1718	USA	−28N	−74N	=72B	−45B	−71N	−94B	F	0.5	15.0	15.0	1.25	1206	-136.0
119	Zhang, Lucas	0	USA	F	F	−83N	F	−57B	=110N	−87N	0.5	7.0	7.0	0.50	1223	0.0
120	Nalakonda, Anish	1784	USA	F	F	=19B	−63N	F	F	F	0.5	6.5	6.5	2.00	1497	-30.4
121	Acharya, Jaison	0	USA	F	F	F	F	F	=61N	−72N	0.5	5.0	5.0	1.25	1389	0.0
122	Elster, Benjamin	1652	USA	−39N	−13B	−61N	F	F	F	F	0.0	9.5	9.5	0.00	998	-39.6
123	Shrivastava, Ansh	1598	USA	F	F	F	F	−48N	−18B	F	0.0	7.0	7.0	0.00	1077	-13.2
124	Taylor, Michael	1821	USA	−7N	F	F	F	F	F	F	0.0	4.5	4.5	0.00	879	-13.8
125	Weideman, Thomas	1827	USA	−14B	F	F	F	F	F	F	0.0	4.0	4.0	0.00	870	-14.2
126	Adkins, Rico	1612	USA	−22N	F	F	F	F	F	F	0.0	3.5	3.5	0.00	808	-10.2
127	Lee, Shan Ramesh	1555	USA	F	F	F	F	−105B	F	F	0.0	1.5	1.5	0.00	957	-9.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Yenamandra, SrinadhUSA
+94.8
4.5 pts · #6
2DB, PranavUSA
+85.1
4.0 pts · #16
3Brahmanapally, SarvagnyaUSA
+82.8
3.5 pts · #30

Top rating losers

1Li, JoylinUSA
-136.0
0.5 pts · #121
2Castro Diaz, FelixPUR
-118.4
1.5 pts · #82
3Nishida, EitoJPN
-91.6
2.5 pts · #58

Biggest upsets

R6+318 Elo gap
Schuster, Zack1681 beat Gindi, Aaron1999
R5+310 Elo gap
Yang, Liwei1689 beat Gindi, Aaron1999
R6+282 Elo gap
Biswas, Rishan1475 beat Liu, Michael1757