IRT Open "Chess Los Andes"
29 players participated in this 7-round tournament, held from 12 Dec 2025 to 14 Dec 2025 in El Alto, Bolivia. 2 titled players from 2 federations. Top 10 Elo average was 1778, and top seed was Luis Miguel Aguilar (🇧🇴 BOL, FM, 2193).
Luis Miguel Aguilar (🇧🇴 BOL, FM, 2193) won with 7.0/7, ahead of Miguel Angel Paxi Mamani (5.0) and Ariadne Ricela Ramallo Aguilar (5.0). Aguilar won solo starting round 4.
The biggest upset came in round 5: Miguel Angel Paxi Mamani (1595) beat Douglas Miguel Mamani Apaza (1991), a +396-point gap.
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How it unfolded
Top 6 · 7 roundsFM Luis Miguel Aguilar led from R4; +2.0-point edge over the runner-up.
FM Luis Miguel Aguilar never relinquished the lead after R4; final gap +2.0 over the runner-up.
FM Luis Miguel Aguilar 7 wins (R1–R7)Miguel Angel Paxi Mamani 4 wins (R3–R6)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1FMLuis Miguel Aguilar | * | — | 1 | 1 |
| 2Vladimir Nestor Mamani Apaza | — | * | — | — |
| 3Miguel Angel Paxi Mamani | 0 | — | * | 1 |
| 4Ariadne Ricela Ramallo Aguilar | 0 | — | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Aguilar, Luis MiguelFM | 2193 | BOL | +15B | +2N | +3B | +8N | +5B | +13N | +11B | 7.0 | 26.0 | 29.0 | 29.00 | 2641 | +16.4 |
| 2 | Paxi Mamani, Miguel Angel | 1595 | PER | +23N | −1B | +12N | +10B | +8B | +3N | −5N | 5.0 | 29.0 | 30.5 | 18.50 | 1904 | +87.6 |
| 3 | Ramallo Aguilar, Ariadne Ricela | 1770 | BOL | +28N | +10B | −1N | +14B | +9N | −2B | +8B | 5.0 | 27.0 | 28.0 | 16.00 | 1851 | +12.0 |
| 4 | Mamani Apaza, Vladimir Nestor | 1791 | BOL | +25B | +9N | =7B | −5N | =6B | +14N | +13B | 5.0 | 24.0 | 25.0 | 15.50 | 1746 | -2.8 |
| 5 | Ramirez, Maria EugeniaWFM | 1933 | BOL | F | +20B | +16N | +4B | −1N | +22N | +2B | 5.0 | 23.5 | 23.5 | 16.50 | 1982 | +7.0 |
| 6 | Zambrano Mara, Percy Rodrigo | 1758 | PER | +24B | +13N | −8B | −9N | =4N | +25B | +16B | 4.5 | 20.5 | 21.5 | 11.00 | 1685 | -16.8 |
| 7 | Churata Huacani, John Osman | 1525 | BOL | +27N | +14B | =4N | F | F | +17B | +22N | 4.5 | 13.5 | 13.5 | 11.00 | 1851 | +47.2 |
| 8 | Mamani Apaza, Douglas Miguel | 1991 | BOL | +12N | +11B | +6N | −1B | −2N | +10B | −3N | 4.0 | 29.5 | 33.5 | 16.50 | 1780 | -29.6 |
| 9 | Huanto Aruquipa, Efren | 1541 | BOL | +29N | −4B | +25N | +6B | −3B | −11N | +18B | 4.0 | 22.5 | 23.0 | 9.00 | 1597 | +10.4 |
| 10 | Macuchapi Mamani, Jehu Benjamin | 1563 | BOL | +18B | −3N | +21B | −2N | +20B | −8N | +15B | 4.0 | 22.0 | 24.0 | 10.00 | 1500 | -17.6 |
| 11 | Cachi Sirpa, Bryan Fernando | 1615 | BOL | +26B | −8N | +15B | −13N | +25N | +9B | −1N | 4.0 | 22.0 | 23.0 | 9.00 | 1644 | +0.8 |
| 12 | Quispe Mamani, Briseyda Belen | 1425 | BOL | −8B | +26N | −2B | −17N | +29B | +21N | +14B | 4.0 | 18.0 | 18.5 | 6.50 | 1398 | -9.2 |
| 13 | Humpire Yana, Alessandro Owhen | 1453 | PER | +19N | −6B | +20N | +11B | F | −1B | −4N | 3.0 | 26.5 | 28.5 | 9.00 | 1561 | +15.2 |
| 14 | Castillo Condori, Jesus Alexander | 1490 | BOL | +22B | −7N | +18B | −3N | +21B | −4B | −12N | 3.0 | 23.5 | 25.0 | 6.50 | 828 | -54.0 |
| 15 | Coaquira Vilca, Breyner Leonel | 1448 | PER | −1N | +23B | −11N | −16B | +19N | +20B | −10N | 3.0 | 23.0 | 24.5 | 6.50 | 850 | -41.2 |
| 16 | Aramburu Huallpa, Camila Aracely | 1572 | PER | F | +17N | −5B | +15N | F | +23B | −6N | 3.0 | 20.0 | 20.0 | 7.50 | 1648 | +12.4 |
| 17 | Arosquipa Carlos, Gerardo Leonel | 1452 | PER | F | −16B | +19N | +12B | F | −7N | +23N | 3.0 | 17.5 | 17.5 | 8.50 | 1383 | -11.2 |
| 18 | FIDE 81471211 | 0 | — | −10N | +27B | −14N | −25B | +26N | +24B | −9N | 3.0 | 14.5 | 15.5 | 3.50 | 703 | 0.0 |
| 19 | FIDE 3889319 | 0 | — | −13B | +24N | −17B | −21N | −15B | +29N | +26B | 3.0 | 13.5 | 14.0 | 3.00 | 651 | 0.0 |
| 20 | Zarate Paccotico, Deyvis Benildo | 0 | PER | +21B | −5N | −13B | +27B | −10N | −15N | F | 2.0 | 18.5 | 19.5 | 3.00 | 799 | 0.0 |
| 21 | Herrera Gomez, Jons Avan | 0 | BOL | −20N | +28B | −10N | +19B | −14N | −12B | F | 2.0 | 17.0 | 18.0 | 4.00 | 692 | 0.0 |
| 22 | Sossa Ojeda, Benjamin Tadeo | 0 | BOL | −14N | F | +26B | =23N | F | −5B | −7B | 1.5 | 18.0 | 18.0 | 1.75 | 849 | 0.0 |
| 23 | Laura Quispe, Wara | 0 | BOL | −2B | −15N | F | =22B | +27N | −16N | −17B | 1.5 | 17.0 | 18.0 | 1.75 | 718 | 0.0 |
| 24 | FIDE 3373363 | 0 | — | −6N | −19B | F | =29N | +28B | −18N | F | 1.5 | 15.0 | 15.5 | 1.25 | 957 | 0.0 |
| 25 | Condori Plata, Neymar Victor | 1412 | BOL | −4N | F | −9B | +18N | −11B | −6N | F | 1.0 | 22.5 | 23.0 | 3.00 | 878 | -30.4 |
| 26 | FIDE 3367320 | 0 | — | −11N | −12B | −22N | F | −18B | +27B | −19N | 1.0 | 16.5 | 16.5 | 1.00 | 720 | 0.0 |
| 27 | FIDE 3367312 | 0 | — | −7B | −18N | +29B | −20N | −23B | −26N | −28N | 1.0 | 13.0 | 13.5 | 0.50 | 725 | 0.0 |
| 28 | FIDE 3373355 | 0 | — | −3B | −21N | F | F | −24N | F | +27B | 1.0 | 9.5 | 9.5 | 1.00 | 967 | 0.0 |
| 29 | FIDE 3373371 | 0 | — | −9B | F | −27N | =24B | −12N | −19B | F | 0.5 | 14.5 | 14.5 | 0.75 | 687 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Paxi Mamani, Miguel AngelPER+87.65.0 pts · #4
- 2Churata Huacani, John OsmanBOL+47.24.5 pts · #9
- 3Aguilar, Luis MiguelFMBOL+16.47.0 pts · #1
- 1Castillo Condori, Jesus AlexanderBOL-54.03.0 pts · #23
- 2Coaquira Vilca, Breyner LeonelPER-41.23.0 pts · #26
- 3Condori Plata, Neymar VictorBOL-30.41.0 pts · #18
- R5+396 Elo gap
- R7+221 Elo gap
- R4+217 Elo gap