IRT "Preludio del 41 Aniversario de El Alto"
Open SwissStandard
8 players participated in this 6-round tournament, held from 21 Feb 2026 to 24 Feb 2026 in El Alto, Bolivia. Top 10 Elo average was 757, and top seed was Bryan Fernando Cachi Sirpa (🇧🇴 BOL, 1616).
John Osman Churata Huacani (🇧🇴 BOL, 1593) won with 5.5/6, ahead of Matias Aron Rodriguez Calle (3.0) and Josept Samuel Salguero Mamani (2.5). Churata Huacani won solo starting round 3.
Location
🇧🇴El Alto, Bolivia
Dates
21 Feb 2026 → 24 Feb 2026
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 6 rounds
Avg top 10
757
Participants
8
Federations · 1 represented
🇧🇴Bolivia×8
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsJohn Osman Churata Huacani led from R3; +2.5-point edge over the runner-up.
Co-leaders
3
2
1
1
1
1
Churata Huacani5.5Rodriguez Calle3Salguero Mamani2.5Rodriguez Quelca2Pinto Vargas1.5Quelca Torrejon1.5
R3–R6 · LEAD HELD
John Osman Churata Huacani never relinquished the lead after R3; final gap +2.5 over the runner-up.
R3 · HEAD-TO-HEAD · WINNER VS 2ND
John Osman Churata Huacani beat Matias Aron Rodriguez Calle (Black).
R1–R4 · WIN STREAK
John Osman Churata Huacani won 4 in a row (R1–R4).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1John Osman Churata Huacani | * | 1 | ½ | — |
| 2Matias Aron Rodriguez Calle | 0 | * | 0 | 1 |
| 3Josept Samuel Salguero Mamani | ½ | 1 | * | — |
| 4Sebastian Rodriguez Quelca | — | 0 | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Churata Huacani, John Osman | 1593 | BOL | +7N | +8B | +2N | +5B | =3B | +6N | 5.5 | 10.0 | 10.5 | 9.25 | 2262 | +13.0 |
| 2 | Rodriguez Calle, Matias Aron | 0 | BOL | +4N | +6B | −1B | +8N | F | −3B | 3.0 | 13.0 | 13.5 | 4.00 | 1541 | 0.0 |
| 3 | Salguero Mamani, Josept Samuel | 0 | BOL | +5B | F | F | F | =1N | +2N | 2.5 | 10.0 | 10.0 | 7.25 | 1563 | 0.0 |
| 4 | Rodriguez Quelca, Sebastian | 1538 | BOL | −2B | −5N | F | =7B | =6N | +8B | 2.0 | 8.0 | 8.0 | 2.00 | 1269 | -28.4 |
| 5 | Pinto Vargas, Anabell Fabiola | 1492 | BOL | −3N | +4B | =8N | −1N | F | F | 1.5 | 14.5 | 15.0 | 2.25 | 1566 | +8.0 |
| 6 | Quispe Mamani, Briseyda Belen | 1431 | BOL | F | −2N | +7B | F | =4B | −1B | 1.5 | 12.0 | 12.0 | 2.50 | 1373 | -5.6 |
| 7 | Quelca Torrejon, Aaron Alfredo | 0 | BOL | −1B | F | −6N | =4N | +8B | F | 1.5 | 11.0 | 11.0 | 1.50 | 1248 | 0.0 |
| 8 | Sossa Ojeda, Benjamin Tadeo | 0 | BOL | F | −1N | =5B | −2B | −7N | −4N | 0.5 | 13.5 | 13.5 | 0.75 | 1268 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Churata Huacani, John OsmanBOL+13.05.5 pts · #1
- 2Pinto Vargas, Anabell FabiolaBOL+8.01.5 pts · #4
- 3Salguero Mamani, Josept SamuelBOL0.02.5 pts · #3
Top rating losers
- 1Rodriguez Quelca, SebastianBOL-28.42.0 pts · #8
- 2Quispe Mamani, Briseyda BelenBOL-5.61.5 pts · #7
- 3Salguero Mamani, Josept SamuelBOL0.02.5 pts · #3