2025 July Cornerstone Chess - Group 4
Round-RobinStandard
Location
🇺🇸Sunnyvale, CA, United States
Dates
19 Jul 2025 → 20 Jul 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Round-robin · 3 rounds
Titled players · 1
IM×1
Federations · 1 represented
🇺🇸United States of America×4
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 4 · 3 roundsCo-leaders
2
2
2
R1 · HEAD-TO-HEAD · WINNER VS 2ND
Hayden Scott Brongersma lost to IM Elliott Winslow (White).
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 🇺🇸IMWinslow, Elliott | 1968 | * | 1 | ½ | ½ | 2.0 | 3.00 | 4.0 | -5.2 | 1882 |
| 1 | 🇺🇸Brongersma, Hayden Scott | 1724 | 0 | * | 1 | 1 | 2.0 | 2.00 | 4.0 | +37.2 | 1964 |
| 3 | 🇺🇸Gu, Thomas | 1620 | ½ | 0 | * | 1 | 1.5 | 1.50 | 4.5 | +30.0 | 1861 |
| 4 | 🇺🇸Walder, Michael | 1893 | ½ | 0 | 0 | * | 0.5 | 1.00 | 5.5 | -28.4 | 1509 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Brongersma, Hayden ScottUSA+37.22.0 pts · #1
- 2Gu, ThomasUSA+30.01.5 pts · #3
- 3Winslow, ElliottIMUSA-5.22.0 pts · #2
Top rating losers
- 1Walder, MichaelUSA-28.40.5 pts · #4
- 2Winslow, ElliottIMUSA-5.22.0 pts · #2
- 3Gu, ThomasUSA30.01.5 pts · #3
Biggest upsets
- R1+273 Elo gap
- R2+169 Elo gap