IRT Sub 1800 Clasificatorio a Final de Chile Absoluta 2026 CLUB INSTITUTO CHILENO DE AJEDREZ
Open SwissStandard
40 players participated in this 6-round tournament, held from 07 Dec 2025 to 08 Dec 2025 in Providencia, Chile. Top 10 Elo average was 1747, and top seed was Matias Marc Bustamante Chavez (🇨🇱 CHI, 1796).
Samir Paz Villanueva (🇨🇱 CHI, 1666) won with 5.0/6, ahead of Oscar Roman Alvarez (5.0) and Alexis Andres Campos Zambrano (4.5). Paz Villanueva won on tie-break after catching the field in the final round.
The biggest upset came in round 4: Vicente Ramirez Castello (1473) beat Matias Marc Bustamante Chavez (1796), a +323-point gap.
Location
🇨🇱Providencia, Chile
Dates
07 Dec 2025 → 08 Dec 2025
Time control
Standard: 30 minutes for game with 30 seconds increment from move 1
System
Swiss · 6 rounds
Federations · 1 represented
🇨🇱Chile×38
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsTight race until R6; 2 players tied at 5.0/6, decided on Buchholz.
Co-leaders
16
6
2
1
1
2
Paz Villanueva5Roman Alvarez5Campos Zambrano4.5Valderrama Candia4.5Seguel Caro4.5Ros Rodriguez4.5— ex-leaders:Roman Alvarezled R4–R5, #19
R6 · TIEBREAK CLUSTER
2 players finish on 5.0/6. Paz Villanueva takes the title on Buchholz Cut1 (20.0).
R5 · HEAD-TO-HEAD · WINNER VS 2ND
Samir Paz Villanueva drew with Oscar Roman Alvarez (Black).
R1–R4 · WIN STREAK
Oscar Roman Alvarez won 4 in a row (R1–R4).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Samir Paz Villanueva | * | ½ | ½ | — |
| 2Oscar Roman Alvarez | ½ | * | — | — |
| 3Alexis Andres Campos Zambrano | ½ | — | * | — |
| 4Valeria Valderrama Candia | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Paz Villanueva, Samir | 1666 | CHI | +40B | +11N | =3N | +19B | =2N | +7B | 5.0 | 20.0 | 20.0 | 15.25 | 1937 | +68.8 |
| 2 | Roman Alvarez, Oscar | 1714 | CHI | +27B | +31N | +29B | +7N | =1B | =6N | 5.0 | 18.0 | 20.0 | 15.25 | 1763 | +3.8 |
| 3 | Campos Zambrano, Alexis Andres | 1736 | CHI | +35B | +6N | =1B | +24N | =4B | =9N | 4.5 | 20.5 | 22.5 | 15.75 | 1842 | +17.0 |
| 4 | Seguel Caro, Andres | 1741 | CHI | +21N | −19B | +30N | +16B | =3N | +12B | 4.5 | 17.5 | 19.5 | 14.25 | 1810 | +21.6 |
| 5 | Valderrama Candia, Valeria | 1770 | CHI | +26B | =17N | =13B | =8N | +24B | +18N | 4.5 | 16.0 | 18.5 | 13.25 | 1899 | +19.6 |
| 6 | Ros Rodriguez, Jorge | 1646 | CHI | +39N | −3B | +36N | +23B | +29N | =2B | 4.5 | 15.5 | 16.5 | 9.50 | 1730 | +13.6 |
| 7 | Rodriguez Perez, Jorge Barbarito | 1599 | CHI | +18B | +8N | +17B | −2B | +10N | −1N | 4.0 | 21.0 | 24.0 | 14.00 | 1845 | +39.2 |
| 8 | Figueroa Estay, Mateo Marxav | 1732 | CHI | +15N | −7B | +22N | =5B | =9N | +29B | 4.0 | 19.0 | 21.0 | 12.75 | 1668 | -14.0 |
| 9 | Morales Montero, Diego Alejandro | 1724 | CHI | +25B | −29N | +14B | +18N | =8B | =3B | 4.0 | 17.5 | 19.5 | 13.25 | 1917 | +47.6 |
| 10 | Lastra San Martin, Freddy Antonio | 1743 | CHI | =14B | +37N | =11B | +13N | −7B | +17N | 4.0 | 17.5 | 19.0 | 11.50 | 1748 | +1.2 |
| 11 | Bustamante Chavez, Matias Marc | 1796 | CHI | +30N | −1B | =10N | −12B | +22N | +23B | 3.5 | 18.0 | 20.0 | 9.50 | 1693 | -14.2 |
| 12 | Ramirez Castello, Vicente | 1473 | CHI | =13B | −18N | +31B | +11N | +20B | −4N | 3.5 | 17.5 | 19.5 | 10.25 | 1732 | +62.8 |
| 13 | Tapia Trevilcock, Levi Caleb | 1736 | CHI | =12N | +36B | =5N | −10B | =25N | +19B | 3.5 | 17.5 | 19.0 | 9.75 | 1649 | -22.0 |
| 14 | Enriquez Godoy, Victor | 1536 | CHI | =10N | =16B | −9N | +36B | =23N | +25B | 3.5 | 16.5 | 18.0 | 9.00 | 1707 | +44.0 |
| 15 | Morales Perez, Francisco Jose | 0 | CHI | −8B | +20N | =28B | −17N | +37B | +26N | 3.5 | 15.0 | 16.5 | 8.25 | 1680 | 0.0 |
| 16 | Toro Ibaceta, Fabian | 1701 | CHI | =37B | =14N | +32B | −4N | =26B | +30N | 3.5 | 14.5 | 16.0 | 7.75 | 1677 | -2.6 |
| 17 | Correa Diaz, Francisco Javier | 1709 | CHI | +34N | =5B | −7N | +15B | =19N | −10B | 3.0 | 19.0 | 21.0 | 9.25 | 1495 | -44.8 |
| 18 | Nunez Munoz, Andreas | 1753 | CHI | −7N | +12B | +25N | −9B | +30N | −5B | 3.0 | 18.5 | 20.5 | 8.00 | 1636 | -18.2 |
| 19 | Medling Vivar, Sidney Nicolas | 1636 | CHI | +38B | +4N | =24B | −1N | =17B | −13N | 3.0 | 18.5 | 19.5 | 8.25 | 1637 | 0.0 |
| 20 | Lincopi Bruch, Carlos Felipe | 1632 | CHI | −36N | −15B | +34N | +21B | −12N | +32B | 3.0 | 14.0 | 15.5 | 7.00 | 1633 | 0.0 |
| 21 | Maldonado Frigerio, Santiago Ignacio | 1536 | CHI | −4B | −38N | +37B | −20N | +39B | +33N | 3.0 | 12.0 | 13.0 | 4.50 | 887 | -24.4 |
| 22 | Arancibia Milovic, Tomas Ignacio | 1564 | CHI | F | +40N | −8B | +38N | −11B | +31B | 3.0 | 10.5 | 10.5 | 3.00 | 964 | -20.4 |
| 23 | Araos Diaz, Constanza Paz | 1739 | CHI | +32B | −24N | +26B | −6N | =14B | −11N | 2.5 | 16.5 | 18.5 | 6.25 | 1576 | -26.6 |
| 24 | Tricot Wong, Francisco | 1692 | CHI | +33N | +23B | =19N | −3B | −5N | F | 2.5 | 16.5 | 16.5 | 6.00 | 1634 | -6.8 |
| 25 | Rivas Chamorro, Lorenza Violeta | 1624 | CHI | −9N | +34B | −18B | +32N | =13B | −14N | 2.5 | 16.0 | 18.0 | 5.75 | 1504 | -32.4 |
| 26 | Orellana Ramos, Edison | 1613 | CHI | −5N | +33B | −23N | +31B | =16N | −15B | 2.5 | 16.0 | 18.0 | 5.75 | 1464 | -20.0 |
| 27 | Perez Farias, Francisco Manuel | 0 | CHI | −2N | −30B | −33N | +34B | =36N | +37B | 2.5 | 12.5 | 14.0 | 4.25 | 868 | 0.0 |
| 28 | Correa Diaz, Domingo Antonio | 1715 | CHI | −31N | +35B | =15N | −29B | −32N | +36B | 2.5 | 11.5 | 13.0 | 5.25 | 1469 | -24.4 |
| 29 | Lucero Fuentes, Orlando | 0 | CHI | F | +9B | −2N | +28N | −6B | −8N | 2.0 | 20.0 | 20.0 | 6.50 | 1635 | 0.0 |
| 30 | Apablaza Aranguiz, Matias | 1621 | CHI | −11B | +27N | −4B | +35N | −18B | −16B | 2.0 | 17.0 | 19.0 | 4.50 | 1443 | -21.6 |
| 31 | Paillal Nunez, Diego Ignacio | 0 | CHI | +28B | −2B | −12N | −26N | +38B | −22N | 2.0 | 16.5 | 17.5 | 3.50 | 1378 | 0.0 |
| 32 | Gonzalez Fuentealba, Sofia Catalina | 1515 | CHI | −23N | +39B | −16N | −25B | +28B | −20N | 2.0 | 14.0 | 15.0 | 3.50 | 1442 | -16.4 |
| 33 | Diaz Matamala, Benjamin Andres | 0 | CHI | −24B | −26N | +27B | −37N | +35B | −21B | 2.0 | 12.5 | 14.0 | 4.50 | 1373 | 0.0 |
| 34 | Robledo Rodriguez, Javier Andres | 0 | CHI | −17B | −25N | −20B | −27N | +?N | +38B | 2.0 | 12.0 | 12.0 | 1.00 | 855 | 0.0 |
| 35 | Duenas Pernigotti, Sebastian Paolo | 1424 | CHI | −3N | −28N | +40B | −30B | −33N | +39B | 2.0 | 12.0 | 12.0 | 1.00 | 891 | -21.2 |
| 36 | Farias Reyes, Esteban Adolfo | 0 | CHI | +20B | −13N | −6B | −14N | =27B | −28N | 1.5 | 17.0 | 19.5 | 4.25 | 1413 | 0.0 |
| 37 | Avila Miranda, Raimundo | 0 | CHI | =16N | −10B | −21N | +33B | −15N | −27N | 1.5 | 16.5 | 18.5 | 3.75 | 1387 | 0.0 |
| 38 | Martinez Osorio, Agustin Alonso | 0 | CHI | −19N | +21B | F | −22B | −31N | −34N | 1.0 | 13.0 | 13.0 | 3.00 | 1457 | 0.0 |
| 39 | FIDE 3473830 | 0 | — | −6B | −32N | F | +?B | −21N | −35N | 1.0 | 11.5 | 11.5 | 0.00 | 730 | 0.0 |
| 40 | FIDE 3488233 | 0 | — | −1N | −22B | −35N | F | F | F | 0.0 | 10.0 | 10.0 | 0.00 | 754 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Paz Villanueva, SamirCHI+68.85.0 pts · #5
- 2Ramirez Castello, VicenteCHI+62.83.5 pts · #12
- 3Morales Montero, Diego AlejandroCHI+47.64.0 pts · #4
Top rating losers
- 1Correa Diaz, Francisco JavierCHI-44.83.0 pts · #29
- 2Rivas Chamorro, Lorenza VioletaCHI-32.42.5 pts · #22
- 3Araos Diaz, Constanza PazCHI-26.62.5 pts · #14
Biggest upsets
- R4+323 Elo gap
- R5+200 Elo gap
- R5+159 Elo gap