Clasificatorio al Sudamericano 2025, Sub-18 Absoluto
Open SwissStandard
14 players participated in this 7-round tournament, held from 19 Sept 2025 to 21 Sept 2025 in Tarija, Bolivia. Top 10 Elo average was 1638, and top seed was Rafael Villca Pereira (🇧🇴 BOL, 1852).
Kevin Josue Ala Ortiz (🇧🇴 BOL, 1817) won with 6.5/7, ahead of Rafael Villca Pereira (5.5) and Luis Hamilton Zambrana Espinoza (4.5). Ala Ortiz won solo starting round 4.
Location
🇧🇴Tarija, Bolivia
Dates
19 Sept 2025 → 21 Sept 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 7 rounds
Federations · 1 represented
🇧🇴Bolivia×13
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsKevin Josue Ala Ortiz led from R4; +1.0-point edge over the runner-up.
Co-leaders
6
3
2
1
1
1
1
R4–R7 · LEAD HELD
Kevin Josue Ala Ortiz never relinquished the lead after R4; final gap +1.0 over the runner-up.
R3 · HEAD-TO-HEAD · WINNER VS 2ND
Kevin Josue Ala Ortiz beat Rafael Villca Pereira (Black).
WIN STREAKS · 2 top finishers
Kevin Josue Ala Ortiz 5 wins (R1–R5)Rafael Villca Pereira 3 wins (R4–R6)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Kevin Josue Ala Ortiz | * | 1 | ½ | 1 |
| 2Rafael Villca Pereira | 0 | * | 1 | 1 |
| 3Luis Hamilton Zambrana Espinoza | ½ | 0 | * | 0 |
| 4Sander Jefferson Rueda Aguirre | 0 | 0 | 1 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Ala Ortiz, Kevin Josue | 1817 | BOL | +14N | +13B | +2N | +4B | +5N | =3B | +6N | 6.5 | 21.0 | 21.0 | 18.75 | 2053 | +49.6 |
| 2 | Villca Pereira, Rafael | 1852 | BOL | +10B | +6N | −1B | +3N | +4B | +7N | =5B | 5.5 | 25.5 | 28.0 | 19.75 | 1866 | +5.2 |
| 3 | Zambrana Espinoza, Luis Hamilton | 1600 | BOL | +9N | −4B | +13N | −2B | +10N | =1N | +8B | 4.5 | 24.5 | 24.5 | 11.75 | 1682 | +20.0 |
| 4 | Rueda Aguirre, Sander Jefferson | 1661 | BOL | +8B | +3N | +11B | −1N | −2N | +5B | −7B | 4.0 | 26.5 | 29.0 | 13.50 | 1696 | +14.4 |
| 5 | Benitez Ramos, Yhossue Gabriel | 1627 | BOL | −11B | +8N | +10B | +6N | −1B | −4N | =2N | 3.5 | 25.0 | 27.5 | 11.75 | 1653 | +8.8 |
| 6 | Arce Arduz, Luis Fernando | 1639 | BOL | +12N | −2B | +7N | −5B | +9N | =8B | −1B | 3.5 | 25.0 | 27.0 | 10.00 | 1587 | -19.6 |
| 7 | Rodriguez Ramos, Mateo | 1567 | BOL | F | =11N | −6B | +14N | +13B | −2B | +4N | 3.5 | 15.5 | 15.5 | 5.25 | 1643 | +18.8 |
| 8 | Bracamonte, Leonel | 1533 | BOL | −4N | −5B | +9B | =10N | +11B | =6N | −3N | 3.0 | 21.0 | 23.5 | 8.50 | 1475 | -18.4 |
| 9 | Guzman Luna, Shuren Erlin | 0 | BOL | −3B | +14B | −8N | +11N | −6B | +13N | −10B | 3.0 | 16.0 | 16.0 | 2.50 | 1439 | 0.0 |
| 10 | Apaza Romero, Matias Eduviel | 1546 | BOL | −2N | +12B | −5N | =8B | −3B | F | +9N | 2.5 | 21.5 | 21.5 | 6.50 | 1467 | -23.2 |
| 11 | Almanza Mamani, Yeshua Gerardo | 0 | BOL | +5N | =7B | −4N | −9B | −8N | +12B | F | 2.5 | 19.0 | 19.0 | 7.25 | 1570 | +12.4 |
| 12 | Castro Tejerina, Uziel Jeremias | 1466 | BOL | −6B | −10N | F | F | +14B | −11N | +13B | 2.0 | 8.5 | 8.5 | 0.00 | 1369 | -19.2 |
| 13 | FIDE 3371239 | 0 | — | F | −1N | −3B | F | −7N | −9B | −12N | 0.0 | 21.5 | 21.5 | 0.00 | 813 | 0.0 |
| 14 | Ortega Benitez, Dominic | 1536 | BOL | −1B | −9N | F | −7B | −12N | F | F | 0.0 | 20.0 | 20.0 | 0.00 | 817 | -48.8 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Ala Ortiz, Kevin JosueBOL+49.66.5 pts · #1
- 2Zambrana Espinoza, Luis HamiltonBOL+20.04.5 pts · #5
- 3Rodriguez Ramos, MateoBOL+18.83.5 pts · #8
Top rating losers
- 1Ortega Benitez, DominicBOL-48.80.0 pts · #13
- 2Apaza Romero, Matias EduvielBOL-23.22.5 pts · #11
- 3Arce Arduz, Luis FernandoBOL-19.63.5 pts · #7