2025 Cornerstone Thanksgiving Invitationals - IM A
10 players participated in this 9-round tournament, held from 26 Nov 2025 to 30 Nov 2025 in Sunnyvale, CA, United States. 9 titled players from 5 federations. Top 10 Elo average was 2236, and top seed was Sebastian Lukas Kostolansky (🇸🇰 SVK, IM, 2444).
Lucas Jiang (🇺🇸 USA, FM, 2256) won with 7.0/9, ahead of Mikayel Rostomyan (6.5) and Sebastian Lukas Kostolansky (5.5). Jiang took the lead from round 7.
The biggest upset came in round 7: Lucas Jiang (FM, 2256) beat Emmanuel Jimenez Garcia (IM, 2363), a +107-point gap.
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How it unfolded
Top 10 · 9 roundsFM Lucas Jiang led from R7 onwards, the runner-up race stayed tight. Title race converged from 2 co-leaders at R4 to 1 by R7.
FM Mikayel Rostomyan takes the sole lead (5.0/6).
FM Lucas Jiang drew with FM Mikayel Rostomyan (Black).
FM Mikayel Rostomyan won 4 in a row (R3–R6).
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇺🇸FMJiang, Lucas | 2256 | * | ½ | ½ | 1 | 1 | ½ | 1 | ½ | 1 | 1 | 7.0 | 28.25 | 38.0 | +45.2 | 2454 |
| 2 | 🇦🇲FMRostomyan, Mikayel | 2273 | ½ | * | ½ | 1 | 1 | 0 | 1 | 1 | 1 | ½ | 6.5 | 27.25 | 38.5 | +30.8 | 2398 |
| 3 | 🇸🇰IMKostolansky, Sebastian Lukas | 2444 | ½ | ½ | * | ½ | ½ | 1 | ½ | ½ | ½ | 1 | 5.5 | 22.75 | 39.5 | -14.3 | 2299 |
| 4 | 🇨🇷IMJimenez Garcia, Emmanuel | 2363 | 0 | 0 | ½ | * | ½ | 1 | ½ | 1 | ½ | ½ | 4.5 | 17.25 | 40.5 | -15.7 | 2222 |
| 5 | 🇺🇸FMMei, Austin | 2269 | 0 | 0 | ½ | ½ | * | 1 | ½ | 1 | ½ | ½ | 4.5 | 17.25 | 40.5 | -7.8 | 2232 |
| 7 | 🇺🇸FMSivakumar, Shaashwath | 2201 | ½ | 1 | 0 | 0 | 0 | * | 1 | 0 | ½ | 1 | 4.0 | 17.75 | 41.0 | -0.8 | 2197 |
| 6 | 🇲🇽IMFigueredo Losada, Leonel | 2304 | 0 | 0 | ½ | ½ | ½ | 0 | * | 1 | ½ | 1 | 4.0 | 14.50 | 41.0 | -13.5 | 2185 |
| 8 | 🇺🇸FMTalwalkar, Vedant | 2095 | ½ | 0 | ½ | 0 | 0 | 1 | 0 | * | ½ | 1 | 3.5 | 14.00 | 41.5 | +30.0 | 2172 |
| 9 | 🇺🇸Zhou, Ruoyu | 2171 | 0 | 0 | ½ | ½ | ½ | ½ | ½ | ½ | * | ½ | 3.5 | 14.00 | 41.5 | -6.0 | 2163 |
| 10 | 🇺🇸CMPalathingal, Rafael | 1984 | 0 | ½ | 0 | ½ | ½ | 0 | 0 | 0 | ½ | * | 2.0 | 9.50 | 43.0 | +15.2 | 2037 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Jiang, LucasFMUSA+45.27.0 pts · #1
- 2Rostomyan, MikayelFMARM+30.86.5 pts · #2
- 3Talwalkar, VedantFMUSA+30.03.5 pts · #8
- 1Jimenez Garcia, EmmanuelIMCRC-15.74.5 pts · #4
- 2Kostolansky, Sebastian LukasIMSVK-14.35.5 pts · #3
- 3Figueredo Losada, LeonelIMMEX-13.54.0 pts · #6
- R7+107 Elo gap
- R1+106 Elo gap
- R3+103 Elo gap