Monthly 4th Sunday Quad B
Round-RobinStandard
Location
🇮🇪Cork, Ireland
Dates
25 May 2026
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Round-robin · 3 rounds
Federations · 1 represented
🇮🇪Ireland×4
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 4 · 3 roundsHubert Machowski led from R2 onwards, the runner-up race stayed tight.
Co-leaders
4
1
1
R2–R3 · LEAD HELD
Hubert Machowski held the sole lead from R2 through R3 without losing it.
R1 · HEAD-TO-HEAD · WINNER VS 2ND
Hubert Machowski drew with Oisin O`sullivan (White).
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇮🇪Machowski, Hubert | 1739 | * | ½ | 1 | 1 | 2.5 | 2.50 | 3.5 | +42.4 | 2027 |
| 2 | 🇮🇪O`sullivan, Oisin | 1705 | ½ | * | ½ | 1 | 2.0 | 2.25 | 4.0 | +15.0 | 1891 |
| 3 | 🇮🇪Twomey, Pat | 1824 | 0 | ½ | * | ½ | 1.0 | 1.25 | 5.0 | -18.0 | 1601 |
| 4 | 🇮🇪Arun, Rahul | 1734 | 0 | 0 | ½ | * | 0.5 | 0.50 | 5.5 | -36.4 | 1483 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Machowski, HubertIRL+42.42.5 pts · #1
- 2O`sullivan, OisinIRL+15.02.0 pts · #2
- 3Twomey, PatIRL-18.01.0 pts · #3
Top rating losers
- 1Arun, RahulIRL-36.40.5 pts · #4
- 2Twomey, PatIRL-18.01.0 pts · #3
- 3O`sullivan, OisinIRL15.02.0 pts · #2