XIV Pan-American School Chess Championship 2025 STD U09 Girls
13 players participated in this 9-round tournament, held from 30 Aug 2025 to 05 Sept 2025 in Florianopolis SC, Brazil. 1 titled players from 5 federations. Top 10 Elo average was 1372, and top seed was Allyson Yu (🇺🇸 USA, WCM, 1737).
Lis Yumi Yoshida Maset (🇧🇷 BRA, 1456) won with 7.5/9, ahead of Allyson Yu (7.5) and Hyemi Elena De la Cruz Pinedo (6.5). Maset won on tie-break after catching the field in the final round.
The biggest upset came in round 5: Lis Yumi Yoshida Maset (1456) beat Lhuanna Khalezzy Jauregui Casas (1588), a +132-point gap.
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 9 roundsTight race until R4; 2 players tied at 7.5/9, decided on Buchholz.
WCM Allyson Yu held the sole lead from R4 through R9 without losing it.
2 players finish on 7.5/9. Maset takes the title on Buchholz Cut1 (37.5).
WCM Allyson Yu beat Lis Yumi Yoshida Maset (White).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1WCMAllyson Yu | * | 1 | ½ | 1 |
| 2Lis Yumi Yoshida Maset | 0 | * | 1 | 1 |
| 3Hyemi Elena De la Cruz Pinedo | ½ | 0 | * | 1 |
| 4Lhuanna Khalezzy Jauregui Casas | 0 | 0 | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Maset, Lis Yumi Yoshida | 1456 | BRA | +5N | +11B | −2N | +3B | +4B | +8N | +7N | +9B | =6N | 7.5 | 37.5 | 39.5 | 30.00 | 1787 | +115.6 |
| 2 | Yu, AllysonWCM | 1737 | USA | +7B | +9N | +1B | +4N | +5B | =3B | +6N | +8N | F | 7.5 | 37.5 | 37.5 | 34.25 | 1940 | +43.6 |
| 3 | De la Cruz Pinedo, Hyemi Elena | 1514 | PER | =11N | +13B | +10B | −1N | +9B | =2N | +4N | +5B | =8B | 6.5 | 35.5 | 36.5 | 22.50 | 1657 | +33.6 |
| 4 | Jauregui Casas, Lhuanna Khalezzy | 1588 | PER | +13N | +6B | +8N | −2B | −1N | +5N | −3B | F | +9N | 5.0 | 37.0 | 37.0 | 15.50 | 1553 | -17.2 |
| 5 | Galiano, Vigand Alenith Anahue | 0 | BRA | −1B | +7N | +6N | +12B | −2N | −4B | F | −3N | +13B | 4.0 | 37.5 | 37.5 | 11.00 | 1415 | 0.0 |
| 6 | Rojas Raraz, Jarely Katty | 1470 | PER | F | −4N | −5B | +10N | =7B | +11N | −2B | +12N | =1B | 4.0 | 35.0 | 35.0 | 12.75 | 1366 | -21.2 |
| 7 | Fiallos Garces, Emilia Alejandra | 1437 | ECU | −2N | −5B | +11N | +13B | =6N | F | −1B | =10B | +12N | 4.0 | 31.0 | 31.0 | 8.50 | 1281 | 0.0 |
| 8 | Da Silva, Valentina Charlotte | 1566 | BRA | +12B | =10N | −4B | =9N | F | −1B | +11N | −2B | =3N | 3.5 | 36.5 | 36.5 | 10.25 | 1338 | -58.0 |
| 9 | De Alcantara, Mariana A Lustosa | 1551 | BRA | F | −2B | =12N | =8B | −3N | +13B | +10N | −1N | −4B | 3.0 | 36.0 | 36.0 | 6.75 | 1214 | -73.2 |
| 10 | Demarchi, Isis | 0 | BRA | F | =8B | −3N | −6B | −13N | +12B | −9B | =7N | +11N | 3.0 | 26.0 | 26.0 | 7.75 | 1272 | 0.0 |
| 11 | Vilela,Mariana Felix | 0 | BRA | =3B | −1N | −7B | F | =12N | −6B | −8B | +13N | −10B | 2.0 | 31.5 | 31.5 | 5.25 | 1126 | 0.0 |
| 12 | Hoff, Isadora Baldoino | 0 | BRA | −8N | F | =9B | −5N | =11B | −10N | +13N | −6B | −7B | 2.0 | 24.5 | 24.5 | 3.50 | 1185 | 0.0 |
| 13 | Nagnibedovsky, Elizabeth | 1403 | CAN | −4B | −3N | F | −7N | +10B | −9N | −12B | −11B | −5N | 1.0 | 29.5 | 29.5 | 3.00 | 733 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Maset, Lis Yumi YoshidaBRA+115.67.5 pts · #2
- 2Yu, AllysonWCMUSA+43.67.5 pts · #1
- 3De la Cruz Pinedo, Hyemi ElenaPER+33.66.5 pts · #3
- 1De Alcantara, Mariana A LustosaBRA-73.23.0 pts · #11
- 2Da Silva, Valentina CharlotteBRA-58.03.5 pts · #7
- 3Rojas Raraz, Jarely KattyPER-21.24.0 pts · #8
- R5+132 Elo gap
- R6+110 Elo gap