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2025 July Cornerstone Chess Norm Invitational - IM A

Round-RobinStandard

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.

Location
🇺🇸San Jose, CA, United States
Dates
16 Jul 2025 → 20 Jul 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Round-robin · 9 rounds
Top seed
🇸🇰IMSebastian Lukas Kostolansky2438
Avg top 10
2,239
Participants
10
Titled players · 8
GM×2
IM×1
FM×3
CM×2
Federations · 5 represented
🇺🇸United States of America×6
🇲🇳Mongolia×1
🇸🇰Slovakia×1
🇺🇦Ukraine×1
🇷🇺Russia×1
Top 3

How it unfolded

Top 10 · 9 rounds

IM Sebastian Lukas Kostolansky led from R3 onwards, the runner-up race stayed tight.

Co-leaders
3
2
1
2
2
1
1
1
1
#1#2#5#10R1R2R3R4R5R6R7R8R9
R3–R9 · LEAD HELD

IM Sebastian Lukas Kostolansky held the sole lead from R3 through R9 without losing it.

R1 · HEAD-TO-HEAD · WINNER VS 2ND

IM Sebastian Lukas Kostolansky drew with GM Tsegmed Batchuluun (White).

WIN STREAKS · 2 top finishers

IM Sebastian Lukas Kostolansky 3 wins (R6–R8)GM Dimitri Komarov 3 wins (R7–R9)

Cross-table

#PlayerElo12345678910PtsSBBhΔ EloPerf
1🇸🇰IMKostolansky, Sebastian Lukas2438*½½½11½1117.027.5038.0+1.42437
2🇲🇳GMBatchuluun, Tsegmed2431½*½1½1½11½6.527.0038.5-2.82384
3🇺🇦GMKomarov, Dimitri2407½½*½½11½116.525.7538.5-0.52386
4🇺🇸FMMei, Austin2280½0½*101½014.518.0040.5-10.82234
5🇷🇺FMKretchetov, Alexandre21690½½0*½½½½14.015.7541.0+7.22204
6🇺🇸FMTang, Benjamin21320001½*01½14.013.7541.0+16.02208
8🇺🇸CMYang, Daniel2219½½00½1*0103.516.2541.5-19.82161
7🇺🇸CMZaloznyy, Mike213700½½½01*½½3.513.7541.5+4.62170
9🇺🇸Nanugonda, Vishva20750001½½0½*13.512.2541.5+36.12177
10🇺🇸Iinuma, Paul Y21020½00001½0*2.08.5043.0-17.02034

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets
2025 July Cornerstone Chess Norm Invitational - IM A — San Jose, CA, United States | Chess Tournament Results | ChessStats