196e Open FIDE Interchess de 3 Rondes -1800
Open SwissStandard
18 players participated in this 3-round tournament, held on 10 Aug 2025 in Paris, France. Top 10 Elo average was 1733, and top seed was William Sithisak (🇫🇷 FRA, 1794).
William Sithisak (🇫🇷 FRA, 1794) won with 2.5/3, ahead of Adhyayan Chatterjee (2.5) and Bruno Touati (2.5). Sithisak shared the lead from round 1, winning on tie-break.
The biggest upset came in round 1: Yanis Gautier (1541) beat Matthieu Lemor (1728), a +187-point gap.
Location
🇫🇷Paris, France
Dates
10 Aug 2025
Time control
Standard: 50 minutes with 10 seconds increment from move 1
System
Swiss · 3 rounds
Federations · 1 represented
🇫🇷France×18
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 3 roundsTight race until R3; 4 players tied at 2.5/3, decided on Buchholz.
Co-leaders
7
3
4
R3 · TIEBREAK CLUSTER
4 players finish on 2.5/3. Sithisak takes the title on Buchholz Cut1 (4.5).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Adhyayan Chatterjee | * | — | — | — |
| 2Bruno Touati | — | * | ½ | — |
| 3William Sithisak | — | ½ | * | — |
| 4Maxim Hourdin | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Sithisak, William | 1794 | FRA | +12N | +6B | =3N | 2.5 | 4.5 | 5.5 | 4.25 | 1992 | +27.6 |
| 2 | Chatterjee, Adhyayan | 1687 | FRA | +13N | +7B | =5N | 2.5 | 4.0 | 5.0 | 4.00 | 1940 | +37.2 |
| 3 | Touati, Bruno | 1743 | FRA | +15N | +10B | =1B | 2.5 | 4.0 | 5.0 | 3.75 | 1969 | +16.2 |
| 4 | Hourdin, Maxim | 1724 | FRA | =9N | +17B | +8N | 2.5 | 3.0 | 3.0 | 2.25 | 1867 | +20.0 |
| 5 | Pivois, Jerome | 1737 | FRA | =8N | +9B | =2B | 2.0 | 4.0 | 5.5 | 3.50 | 1706 | -2.4 |
| 6 | Fan, Sizhuo | 1737 | FRA | +16B | −1N | +14B | 2.0 | 3.5 | 4.5 | 2.00 | 1746 | +2.0 |
| 7 | Lamorelle, Alexey | 1793 | FRA | +18B | −2N | +12B | 2.0 | 3.5 | 3.5 | 1.00 | 1786 | -1.2 |
| 8 | Sithisak, Romain | 1543 | FRA | =5B | +11N | −4B | 1.5 | 4.5 | 6.0 | 2.50 | 1669 | +18.8 |
| 9 | Rossiaud, Colas | 1505 | FRA | =4B | −5N | +13N | 1.5 | 4.5 | 5.5 | 2.25 | 1644 | +20.8 |
| 10 | Lescot, Paul | 1710 | FRA | +14B | −3N | =11B | 1.5 | 4.0 | 5.0 | 1.75 | 1598 | -8.6 |
| 11 | Gautier, Yanis | 1541 | FRA | +17N | −8B | =10N | 1.5 | 3.0 | 3.0 | 0.75 | 1663 | +18.8 |
| 12 | Madon, Francis | 1679 | FRA | −1B | +16N | −7N | 1.0 | 4.5 | 5.5 | 1.00 | 1590 | -6.8 |
| 13 | Pham Doan, Bao Anh | 1435 | FRA | −2B | +18N | −9B | 1.0 | 4.0 | 4.0 | 0.00 | 1479 | +2.0 |
| 14 | Abbey, Anate | 1500 | FRA | −10N | +15B | −6N | 1.0 | 3.5 | 4.5 | 1.00 | 1552 | +3.0 |
| 15 | Bertaux, Maximilien | 1580 | FRA | −3B | −14N | +18B | 1.0 | 3.5 | 3.5 | 0.00 | 1499 | -13.6 |
| 16 | Rouchaud, Florent | 1558 | FRA | −6N | −12B | +17N | 1.0 | 3.0 | 3.0 | 0.00 | 1589 | +2.6 |
| 17 | Lemor, Matthieu | 1728 | FRA | −11B | −4N | −16B | 0.0 | 4.0 | 5.0 | 0.00 | 807 | -79.2 |
| 18 | Gautier, Sacha | 1617 | FRA | −7N | −13B | −15N | 0.0 | 3.0 | 4.0 | 0.00 | 814 | -61.2 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Chatterjee, AdhyayanFRA+37.22.5 pts · #1
- 2Sithisak, WilliamFRA+27.62.5 pts · #3
- 3Rossiaud, ColasFRA+20.81.5 pts · #9
Top rating losers
- 1Lemor, MatthieuFRA-79.20.0 pts · #17
- 2Gautier, SachaFRA-61.20.0 pts · #18
- 3Bertaux, MaximilienFRA-13.61.0 pts · #15
Biggest upsets
- R1+187 Elo gap
- R2+182 Elo gap
- R3+170 Elo gap