Cuartos de Final Club Colonia 2025
Open SwissStandard
20 players participated in this 5-round tournament, held from 27 Dec 2025 to 28 Dec 2025 in Montevideo, Uruguay. Top 10 Elo average was 1713, and top seed was Joaquin Amorena (🇺🇾 URU, 1803).
Joaquin Lamas (🇺🇾 URU, 1734) won with 5.0/5, ahead of Alonso Bentancor (3.5) and Sergio Washington Fernandez (3.5). Lamas won solo starting round 3.
The biggest upset came in round 1: Pablo Acosta (1476) beat Roberto Osores (1764), a +288-point gap.
Location
🇺🇾Montevideo, Uruguay
Dates
27 Dec 2025 → 28 Dec 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Federations · 1 represented
🇺🇾Uruguay×16
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 5 roundsJoaquin Lamas led from R3; +1.5-point edge over the runner-up.
Co-leaders
8
2
1
1
1
R3–R5 · LEAD HELD
Joaquin Lamas never relinquished the lead after R3; final gap +1.5 over the runner-up.
R1–R5 · WIN STREAK
Joaquin Lamas won 5 in a row (R1–R5).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Joaquin Lamas | * | — | — | 1 |
| 2Sergio Washington Fernandez | — | * | — | — |
| 3Alonso Bentancor | — | — | * | — |
| 4Roberto Osores | 0 | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Lamas, Joaquin | 1734 | URU | +17B | +6N | +11B | +10N | +4N | 5.0 | 8.5 | 8.5 | 8.50 | 2460 | +49.2 |
| 2 | Bentancor, Alonso | 1615 | URU | +16N | −8N | =5B | +6N | +9B | 3.5 | 9.5 | 9.5 | 6.00 | 1770 | +24.4 |
| 3 | Fernandez, Sergio Washington | 1563 | URU | −8B | +19N | =6B | +11N | +10N | 3.5 | 7.5 | 7.5 | 4.25 | 1798 | +18.2 |
| 4 | Osores, Roberto | 1764 | URU | −10B | +12B | +7N | +5N | −1B | 3.0 | 11.5 | 13.0 | 6.50 | 1689 | -8.0 |
| 5 | Arriola, Adrian | 1794 | URU | +15B | =13N | =2N | −4B | +7N | 3.0 | 10.0 | 11.0 | 5.50 | 1695 | -11.8 |
| 6 | Marti, Daniel | 0 | URU | +7N | −1B | =3N | −2B | +16B | 2.5 | 14.0 | 14.0 | 3.75 | 1539 | 0.0 |
| 7 | Tachini, Luis | 1592 | URU | −6B | +17N | −4B | +16N | −5B | 2.0 | 8.5 | 8.5 | 0.00 | 979 | -20.4 |
| 8 | Amorena, Joaquin | 1803 | URU | +3N | +2B | F | F | F | 2.0 | 7.0 | 7.0 | 7.00 | 2389 | +18.4 |
| 9 | Garcia, Daniel | 1714 | URU | F | +16B | F | +18N | −2N | 2.0 | 3.5 | 3.5 | 0.00 | 815 | -25.6 |
| 10 | Acosta, Pablo | 1476 | URU | +4N | =11N | F | −1B | −3B | 1.5 | 13.0 | 14.5 | 3.75 | 1613 | +12.0 |
| 11 | Aroztegui, Julian | 1740 | URU | +20N | =10B | −1N | −3B | −14N | 1.5 | 11.5 | 11.5 | 0.75 | 1318 | -80.0 |
| 12 | Silveira, Carlos | 1491 | URU | =14B | −4N | F | F | +17B | 1.5 | 5.5 | 5.5 | 0.75 | 1582 | +7.2 |
| 13 | Reyna, Emiliano | 1588 | URU | +18N | =5B | F | F | F | 1.5 | 4.5 | 4.5 | 1.50 | 1794 | +10.4 |
| 14 | Esteves, Gaston | 1786 | URU | =12N | F | F | F | +11B | 1.5 | 3.0 | 3.0 | 2.25 | 1809 | +3.6 |
| 15 | Marquez, Uberlindo | 1556 | URU | −5N | F | F | F | +18B | 1.0 | 4.5 | 4.5 | 0.00 | 994 | -4.0 |
| 16 | FIDE 3033465 | 0 | — | −2B | −9N | F | −7B | −6N | 0.0 | 10.0 | 11.0 | 0.00 | 840 | 0.0 |
| 17 | FIDE 3039196 | 0 | — | −1N | −7B | F | F | −12N | 0.0 | 10.0 | 10.0 | 0.00 | 806 | 0.0 |
| 18 | Pereira, Jose | 0 | URU | −13B | F | F | −9B | −15N | 0.0 | 4.5 | 4.5 | 0.00 | 819 | 0.0 |
| 19 | FIDE 3039188 | 0 | — | F | −3B | F | F | F | 0.0 | 3.5 | 3.5 | 0.00 | 763 | 0.0 |
| 20 | FIDE 3039161 | 0 | — | −11B | F | F | F | F | 0.0 | 1.5 | 1.5 | 0.00 | 940 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Lamas, JoaquinURU+49.25.0 pts · #2
- 2Bentancor, AlonsoURU+24.43.5 pts · #6
- 3Amorena, JoaquinURU+18.42.0 pts · #4
Top rating losers
- 1Aroztegui, JulianURU-80.01.5 pts · #10
- 2Garcia, DanielURU-25.62.0 pts · #16
- 3Tachini, LuisURU-20.42.0 pts · #19
Biggest upsets
- R1+288 Elo gap
- R4+177 Elo gap