O'Sullivan, Oisin
Identity
- Title
- —
- Gender
- M
- Year of birth
- 2000
- Federation
- Ireland
- FIDE ID
- 2518082
- National ID
- 19592
- FIDE (STD)
- 1743
- National (STD)
- 1802
- Peak FIDE
- 1743 (2026)
- Peak National
- 1802 (2026)
Tournament rating snapshot: Oct. 25, 2026
Tournament status
Rank:
12
(initial)
→
38
(final)
(-26 ▼)
| Played | W | D | L | Score | |
|---|---|---|---|---|---|
| 2 | 0 | 0 | 2 | 0 | |
| 1 | 1 | 0 | 0 | 1 | |
| Total | 3 | 1 | 0 | 2 | 1 |
| Performance | Played | Score | Opp. avg | TPR | Xp | +/− |
|---|---|---|---|---|---|---|
| FIDE | 3 | 1 | 1801 | 1676 | 1.25 | 1- |
| National | 3 | 1 | 1847 | 1722 | 1.31 | 1- |
Games
| Rd | Bd | Col | Opponent | Fed | Score | FIDE | National | TB1 | TB2 | TB3 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rating | Xp | Δ | Rating | Xp | Δ | |||||||||
| 1 | 6 | Brito, Franco | IRL | 0 | 1797 | 0.423 | -8.46 | 1843 | 0.441 | -10.59 | — | 0.00 | — | |
| 2 | 6 | O'Neill, Matthew | IRL | 1 | 1799 | 0.420 | +11.60 | 1863 | 0.413 | +14.09 | 1.00 | 1.00 | — | |
| 3 | 5 | Hackett, Len | IRL | 0 | 1806 | 0.410 | -8.21 | 1836 | 0.451 | -10.83 | — | 0.00 | — | |
| Σ / μ | Σ 1 | μ 1801 | Σ 1.25 | Σ -5.07 | μ 1847 | Σ 1.31 | Σ -7.33 | 1.00 | ||||||
TB1: Direct Encounter (DE)
TB2: Sonneborn-Berger (SB)
TB3: Koya System (KS)