Championnat Corsica Chess Club 2025 - Groupe A
9 players participated in this 9-round tournament, held from 28 Nov 2025 to 19 Dec 2025 in Bastia, France. 2 titled players. Top 10 Elo average was 1971, and top seed was Pierre-Louis Pieri (🇫🇷 FRA, CM, 2231).
Pierre-Louis Pieri (🇫🇷 FRA, CM, 2231) won with 6.0/9, ahead of Jean Cardi (5.5) and Jean-Michel Bigonnet (5.5). Pieri clinched sole first place in the final round.
The biggest upset came in round 5: Jean Cardi (1981) beat Pierre-Louis Pieri (CM, 2231), a +250-point gap.
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How it unfolded
Top 9 · 9 roundsCM Pierre-Louis Pieri led from R9 onwards, the runner-up race stayed tight. Title race converged from 2 co-leaders at R4 to 1 by R9.
CM Pierre-Louis Pieri takes the sole lead (6.0/9).
CM Pierre-Louis Pieri beat Jean-Michel Bigonnet (Black).
CM Pierre-Louis Pieri 4 wins (R6–R9)Jean-Michel Bigonnet 3 wins (R2–R4)
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇫🇷CMPieri, Pierre-Louis | 2231 | * | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 6.0 | 15.50 | 25.0 | -11.4 | 2135 |
| 3 | 🇫🇷Cardi, Jean | 1981 | 1 | * | ½ | 1 | 1 | 0 | 1 | ½ | ½ | 5.5 | 19.25 | 25.5 | +26.6 | 2111 |
| 2 | 🇫🇷Bigonnet, Jean-Michel | 2090 | 0 | ½ | * | ½ | 1 | ½ | 1 | 1 | 1 | 5.5 | 13.75 | 25.5 | +3.8 | 2098 |
| 4 | 🇫🇷CMDeladerriere, Apollo | 2213 | 1 | 0 | ½ | * | 1 | ½ | — | 1 | — | 4.0 | 14.25 | 27.0 | -24.8 | 2102 |
| 5 | 🇫🇷Frisoni, Robin | 1818 | 0 | 0 | 0 | 0 | * | 1 | 1 | 1 | — | 3.0 | 5.50 | 28.0 | +20.8 | 1959 |
| 7 | 🇫🇷Todirascu, Niculai | 1858 | 0 | 1 | ½ | ½ | 0 | * | 0 | 0 | 0 | 2.0 | 10.25 | 29.0 | -16.8 | 1793 |
| 6 | 🇫🇷Castagnerol, Cerise | 1819 | 0 | 0 | 0 | — | 0 | 1 | * | 1 | — | 2.0 | 3.50 | 29.0 | +4.0 | 1850 |
| 8 | 🇫🇷Orsoni, Jean-Philippe | 1882 | 0 | ½ | 0 | 0 | 0 | 1 | 0 | * | — | 1.5 | 4.75 | 29.5 | -20.6 | 1771 |
| 9 | 🇫🇷Deladerriere, Helio | 1851 | 0 | ½ | 0 | — | — | 1 | — | — | * | 1.5 | 4.75 | 29.5 | +16.0 | 1953 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Cardi, JeanFRA+26.65.5 pts · #3
- 2Frisoni, RobinFRA+20.83.0 pts · #5
- 3Deladerriere, HelioFRA+16.01.5 pts · #9
- 1Deladerriere, ApolloCMFRA-24.84.0 pts · #4
- 2Orsoni, Jean-PhilippeFRA-20.61.5 pts · #8
- 3Todirascu, NiculaiFRA-16.82.0 pts · #7
- R5+250 Elo gap
- R4+232 Elo gap
- R9+123 Elo gap