2nd Koltanowski Memorial Tournament - 1600-1999
32 players participated in this 4-round tournament, held from 16 Aug 2025 to 17 Aug 2025 in San Francisco, CA, United States. 2 federations represented. Top 10 Elo average was 1779, and top seed was Hovik Manvelyan (🇺🇸 USA, 1933).
William Obrien (🇺🇸 USA, 1762) won with 4.0/4, ahead of Serena Liu (3.0) and Kayden Pak Mo (3.0). Obrien won solo starting round 3.
The biggest upset came in round 1: Youting Long (1505) beat Rogelio Aram Gongora Zermeno (1914), a +409-point gap.
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How it unfolded
Top 6 · 4 roundsWilliam Obrien led from R3; +1.0-point edge over the runner-up.
William Obrien never relinquished the lead after R3; final gap +1.0 over the runner-up.
William Obrien 4 wins (R1–R4)Rogelio Aram Gongora Zermeno 3 wins (R2–R4)
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Obrien, William | 1762 | USA | +15N | +13B | +14N | +5B | 4.0 | 6.5 | 8.5 | 8.50 | 2540 | +74.8 |
| 2 | Liu, Serena | 1683 | USA | +16N | =9B | =8N | +13B | 3.0 | 7.0 | 9.0 | 6.50 | 1803 | +12.0 |
| 3 | Mo, Kayden Pak | 1602 | USA | +30B | +20N | −5B | +14B | 3.0 | 6.0 | 6.0 | 3.50 | 1920 | +49.6 |
| 4 | Gongora Zermeno, Rogelio Aram | 1914 | MEX | −6B | +26N | +25B | +19N | 3.0 | 5.5 | 6.5 | 4.00 | 1762 | -10.6 |
| 5 | Patankar, Shubham | 1769 | USA | +17N | =7B | +3N | −1N | 2.5 | 9.5 | 11.5 | 6.25 | 1703 | -12.8 |
| 6 | Long, Youting | 1505 | USA | +4N | =10B | =7N | =8B | 2.5 | 8.0 | 10.5 | 6.75 | 1731 | +44.0 |
| 7 | Viswanath, Naren Ganapathy | 1507 | USA | +27B | =5N | =6B | =9N | 2.5 | 7.5 | 8.5 | 4.75 | 1745 | +37.2 |
| 8 | Bharadwaj, Samarth Ram | 1560 | USA | =25B | +22N | =2B | =6N | 2.5 | 7.0 | 8.0 | 4.75 | 1627 | +14.0 |
| 9 | Mythil, Arnav | 0 | USA | +31B | =2N | =20B | =7B | 2.5 | 7.0 | 7.0 | 3.50 | 1670 | 0.0 |
| 10 | Seidel, Eli | 1577 | USA | +26B | =6N | −11B | +21N | 2.5 | 6.5 | 7.5 | 3.75 | 1712 | +28.4 |
| 11 | Brahmanapally, Sarvagnya | 1614 | USA | =28N | +23B | +10N | F | 2.5 | 5.0 | 5.0 | 4.50 | 2359 | +34.0 |
| 12 | Sundaram, Deepak | 1699 | USA | =22B | =25N | =21B | +20N | 2.5 | 4.5 | 5.5 | 3.50 | 1715 | +4.8 |
| 13 | Goel, Darsh | 1662 | USA | +18B | −1N | +29B | −2N | 2.0 | 9.0 | 9.5 | 2.50 | 1690 | +6.4 |
| 14 | Chen, Xiaoshan | 1831 | USA | +29B | +19N | −1B | −3N | 2.0 | 9.0 | 9.5 | 2.50 | 1662 | -34.0 |
| 15 | Viswanath, Avyukth Ganapathy | 1698 | USA | −1B | +31N | +24B | −17N | 2.0 | 7.5 | 7.5 | 1.50 | 1645 | -11.6 |
| 16 | Jonnalagada, Navaneet Vishnusai | 0 | USA | −2B | =29N | +22B | =24N | 2.0 | 6.0 | 6.5 | 2.50 | 1606 | 0.0 |
| 17 | Miller, Theodore | 1562 | USA | −5B | +27N | F | +15B | 2.0 | 5.5 | 5.5 | 3.00 | 1810 | +40.0 |
| 18 | Gu, Thomas | 1654 | USA | −13N | −21B | +23N | +30B | 2.0 | 5.0 | 5.0 | 1.50 | 1527 | -24.8 |
| 19 | Pang, Elena Hingyip | 1653 | USA | +32N | −14B | +30N | −4B | 2.0 | 5.0 | 5.0 | 0.00 | 1767 | +15.6 |
| 20 | Ong, Matthew | 1782 | USA | +21N | −3B | =9N | −12B | 1.5 | 8.0 | 9.5 | 2.75 | 1560 | -36.0 |
| 21 | Shokeen, Ayaan | 1722 | USA | −20B | +18N | =12N | −10B | 1.5 | 7.0 | 8.5 | 3.25 | 1599 | -34.8 |
| 22 | Lee, Shan Ramesh | 1483 | USA | =12N | −8B | −16N | +26B | 1.5 | 7.0 | 8.0 | 2.25 | 1618 | +22.0 |
| 23 | DB, Pranav | 1541 | USA | =24B | −11N | −18B | +31N | 1.5 | 6.0 | 6.0 | 0.75 | 1552 | +1.2 |
| 24 | Liu, Jinfeng | 1636 | USA | =23N | =28B | −15N | =16B | 1.5 | 5.5 | 6.5 | 2.25 | 1428 | -21.2 |
| 25 | Liao, Aiden | 1462 | USA | =8N | =12B | −4N | −27B | 1.0 | 8.0 | 9.0 | 2.50 | 1483 | +0.8 |
| 26 | Wang, Ayden | 1596 | USA | −10N | −4B | +31B | −22N | 1.0 | 7.0 | 7.0 | 0.00 | 1456 | -31.2 |
| 27 | Amin, Eshaan Kashyap | 1587 | USA | −7N | −17B | F | +25N | 1.0 | 5.5 | 5.5 | 1.00 | 1383 | -32.8 |
| 28 | Yu, Andrew | 0 | USA | =11B | =24N | F | F | 1.0 | 4.0 | 4.0 | 2.00 | 1622 | 0.0 |
| 29 | Wang, Angela Zixi | 1632 | USA | −14N | =16B | −13N | F | 0.5 | 6.0 | 6.0 | 1.00 | 945 | -28.4 |
| 30 | Lee, Angelina R | 0 | USA | −3N | F | −19B | −18N | 0.0 | 7.0 | 7.0 | 0.00 | 847 | 0.0 |
| 31 | Navaneetha Prabhu, Arjunsai | 1628 | USA | −9N | −15B | −26N | −23B | 0.0 | 6.0 | 7.0 | 0.00 | 812 | -62.4 |
| 32 | Manvelyan, Hovik | 1933 | USA | −19B | F | F | F | 0.0 | 2.0 | 2.0 | 0.00 | 851 | -16.8 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Obrien, WilliamUSA+74.84.0 pts · #1
- 2Mo, Kayden PakUSA+49.63.0 pts · #10
- 3Long, YoutingUSA+44.02.5 pts · #3
- 1Navaneetha Prabhu, ArjunsaiUSA-62.40.0 pts · #32
- 2Ong, MatthewUSA-36.01.5 pts · #23
- 3Shokeen, AyaanUSA-34.81.5 pts · #20
- R1+409 Elo gap
- R1+280 Elo gap
- R4+229 Elo gap