Costello, John
- Federation
- IOM
- Rating (latest event)
- 1832
- FIDE ID
- 451819
- Games here
- 10 (+3 =1 −6)
Tournaments 1
| Tournament | # | Pts | Perf | ± |
|---|---|---|---|---|
| 46th FIDE Chess Olympiad Samarkand 2026OpenIsle of Man | 747 | 3½/10 | 1759 | −26 |
Games 10
- vs FMKabamwanishi, Mashala194046th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 63-87 · Round 110
- vs Henry Marwa Michael180746th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 63-87 · Round 100
- vs Delrieu, Marc156446th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 88+ · Round 9½
- vs Abdou, Mohamed180646th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 63-87 · Round 81
- vs Ngwenya Kwanele Mangaliso169446th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 88+ · Round 71
- vs MBOULA MBOUMBA, Jerome181246th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 63-87 · Round 60
- vs IMHusbands, Orlando222246th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 63-87 · Round 50
- vs FMSai Han Thiha209946th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 63-87 · Round 30
- vs Canto, Roger Rashid46th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 88+ · Round 21
- vs CMGermanovs, Georgijs238946th FIDE Chess Olympiad Samarkand 2026 · Open | Matches 38-62 · Round 10