2025 July Cornerstone Chess Norm Invitational - IM A
10 players participated in this 9-round tournament, held from 16 Jul 2025 to 20 Jul 2025 in San Jose, CA, United States. 8 titled players from 5 federations. Top 10 Elo average was 2239, and top seed was Sebastian Lukas Kostolansky (🇸🇰 SVK, IM, 2438).
Sebastian Lukas Kostolansky (🇸🇰 SVK, IM, 2438) won with 7.0/9, ahead of Tsegmed Batchuluun (6.5) and Dimitri Komarov (6.5). Kostolansky won solo starting round 6.
The biggest upset came in round 1: Vishva Nanugonda (2075) beat Austin Mei (FM, 2280), a +205-point gap.
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How it unfolded
Top 10 · 9 roundsIM Sebastian Lukas Kostolansky led from R3 onwards, the runner-up race stayed tight.
IM Sebastian Lukas Kostolansky held the sole lead from R3 through R9 without losing it.
IM Sebastian Lukas Kostolansky drew with GM Tsegmed Batchuluun (White).
IM Sebastian Lukas Kostolansky 3 wins (R6–R8)GM Dimitri Komarov 3 wins (R7–R9)
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇸🇰IMKostolansky, Sebastian Lukas | 2438 | * | ½ | ½ | ½ | 1 | 1 | ½ | 1 | 1 | 1 | 7.0 | 27.50 | 38.0 | +1.4 | 2437 |
| 2 | 🇲🇳GMBatchuluun, Tsegmed | 2431 | ½ | * | ½ | 1 | ½ | 1 | ½ | 1 | 1 | ½ | 6.5 | 27.00 | 38.5 | -2.8 | 2384 |
| 3 | 🇺🇦GMKomarov, Dimitri | 2407 | ½ | ½ | * | ½ | ½ | 1 | 1 | ½ | 1 | 1 | 6.5 | 25.75 | 38.5 | -0.5 | 2386 |
| 4 | 🇺🇸FMMei, Austin | 2280 | ½ | 0 | ½ | * | 1 | 0 | 1 | ½ | 0 | 1 | 4.5 | 18.00 | 40.5 | -10.8 | 2234 |
| 5 | 🇷🇺FMKretchetov, Alexandre | 2169 | 0 | ½ | ½ | 0 | * | ½ | ½ | ½ | ½ | 1 | 4.0 | 15.75 | 41.0 | +7.2 | 2204 |
| 6 | 🇺🇸FMTang, Benjamin | 2132 | 0 | 0 | 0 | 1 | ½ | * | 0 | 1 | ½ | 1 | 4.0 | 13.75 | 41.0 | +16.0 | 2208 |
| 8 | 🇺🇸CMYang, Daniel | 2219 | ½ | ½ | 0 | 0 | ½ | 1 | * | 0 | 1 | 0 | 3.5 | 16.25 | 41.5 | -19.8 | 2161 |
| 7 | 🇺🇸CMZaloznyy, Mike | 2137 | 0 | 0 | ½ | ½ | ½ | 0 | 1 | * | ½ | ½ | 3.5 | 13.75 | 41.5 | +4.6 | 2170 |
| 9 | 🇺🇸Nanugonda, Vishva | 2075 | 0 | 0 | 0 | 1 | ½ | ½ | 0 | ½ | * | 1 | 3.5 | 12.25 | 41.5 | +36.1 | 2177 |
| 10 | 🇺🇸Iinuma, Paul Y | 2102 | 0 | ½ | 0 | 0 | 0 | 0 | 1 | ½ | 0 | * | 2.0 | 8.50 | 43.0 | -17.0 | 2034 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Nanugonda, VishvaUSA+36.13.5 pts · #9
- 2Tang, BenjaminFMUSA+16.04.0 pts · #6
- 3Kretchetov, AlexandreFMRUS+7.24.0 pts · #5
- 1Yang, DanielCMUSA-19.83.5 pts · #8
- 2Iinuma, Paul YUSA-17.02.0 pts · #10
- 3Mei, AustinFMUSA-10.84.5 pts · #4
- R1+205 Elo gap
- R6+148 Elo gap
- R1+117 Elo gap