Abierto de Invierno Comodoro
16 players participated in this 5-round tournament, held from 08 Aug 2025 to 10 Aug 2025 in Comodoro Rivadavia - Chubut, Argentina. Top 10 Elo average was 1405, and top seed was Adrian Hernan Muruchi Machaca (🇦🇷 ARG, 1876).
Sergio Alonso (🇦🇷 ARG, 1754) won with 4.5/5, ahead of Marcelo Anacaya (3.5) and Fernando Garcia (3.5). Alonso broke clear in the final round.
The biggest upset came in round 4: Ricardo Musumeci (1719) beat Adrian Hernan Muruchi Machaca (1876), a +157-point gap.
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 5 roundsSergio Alonso led from R5; +1.0-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.
Sergio Alonso never relinquished the lead after R5; final gap +1.0 over the runner-up.
Sergio Alonso drew with Fernando Garcia (White).
Sergio Alonso 3 wins (R1–R3)Fernando Garcia 3 wins (R1–R3)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Sergio Alonso | * | ½ | 1 | — |
| 2Fernando Garcia | ½ | * | — | 0 |
| 3Marcelo Anacaya | 0 | — | * | 1 |
| 4Ricardo Pettinari | — | 1 | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Alonso, Sergio | 1754 | ARG | +14N | +6B | +2N | =3B | +10N | 4.5 | 11.0 | 11.0 | 9.25 | 2002 | +18.0 |
| 2 | Anacaya, Marcelo | 1809 | ARG | +12B | +4N | −1B | =5N | +7B | 3.5 | 13.5 | 14.5 | 8.25 | 1843 | +3.4 |
| 3 | Garcia, Fernando | 1738 | ARG | +13B | +5N | +7B | =1N | −4B | 3.5 | 13.5 | 14.0 | 8.25 | 1843 | +11.0 |
| 4 | Pettinari, Ricardo | 1680 | ARG | +15N | −2B | +11N | =6B | +3N | 3.5 | 10.5 | 10.5 | 5.75 | 1729 | +7.6 |
| 5 | Quinteros, Omar | 1837 | ARG | +16N | −3B | +8N | =2B | +11B | 3.5 | 10.0 | 10.0 | 4.75 | 1807 | -2.6 |
| 6 | Bustos, Pedro | 1639 | ARG | +11B | −1N | +15B | =4N | F | 2.5 | 9.0 | 9.0 | 2.75 | 1524 | -5.6 |
| 7 | Musumeci, Ricardo | 1719 | ARG | F | +9B | −3N | +8B | −2N | 2.0 | 11.0 | 11.0 | 4.00 | 1682 | -2.8 |
| 8 | Muruchi Machaca, Adrian Hernan | 1876 | ARG | F | +10N | −5B | −7N | +9B | 2.0 | 9.0 | 9.0 | 3.50 | 978 | -50.4 |
| 9 | Zalaya, Ivo | 0 | ARG | =10B | −7N | =13N | +14B | −8N | 2.0 | 6.0 | 6.0 | 1.00 | 997 | 0.0 |
| 10 | FIDE 122998 | 0 | — | =9N | −8B | +12N | F | −1B | 1.5 | 9.5 | 9.5 | 2.00 | 1015 | 0.0 |
| 11 | FIDE 20067844 | 0 | — | −6N | +14B | −4B | F | −5N | 1.0 | 9.5 | 9.5 | 0.00 | 919 | 0.0 |
| 12 | Marquina, Osmar | 0 | ARG | −2N | F | −10B | F | +14N | 1.0 | 5.5 | 5.5 | 0.00 | 1009 | 0.0 |
| 13 | FIDE 20067836 | 0 | — | −3N | F | =9B | F | F | 0.5 | 6.5 | 6.5 | 1.00 | 938 | 0.0 |
| 14 | FIDE 20008635 | 0 | — | −1B | −11N | F | −9N | −12B | 0.0 | 8.5 | 8.5 | 0.00 | 954 | 0.0 |
| 15 | Velardez, Felipe | 0 | ARG | −4B | F | −6N | F | F | 0.0 | 7.0 | 7.0 | 0.00 | 860 | 0.0 |
| 16 | FIDE 195090 | 0 | — | −5B | F | F | F | F | 0.0 | 5.5 | 5.5 | 0.00 | 1037 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Alonso, SergioARG+18.04.5 pts · #2
- 2Garcia, FernandoARG+11.03.5 pts · #1
- 3Pettinari, RicardoARG+7.63.5 pts · #4
- 1Muruchi Machaca, Adrian HernanARG-50.42.0 pts · #9
- 2Bustos, PedroARG-5.62.5 pts · #7
- 3Musumeci, RicardoARG-2.82.0 pts · #6
- R4+157 Elo gap