XIV Pan-American School Chess Championship 2025 STD U09 Open
Open SwissStandard
23 players participated in this 9-round tournament, held from 30 Aug 2025 to 05 Sept 2025 in Florianopolis SC, Brazil. 7 federations represented. Top 10 Elo average was 1586, and top seed was Brack Gustavo Silvestre Tapullima (🇵🇪 PER, 1734).
Darren Wu (🇺🇸 USA, 1602) won with 7.5/9, ahead of Lucas Cazarim De Oliveira (6.5) and Benjamin Furquim Barbosa (6.0). Wu took the lead from round 5.
The biggest upset came in round 7: Diego R Chahuares Chahuaylla (1488) beat Lucas Cazarim De Oliveira (1725), a +237-point gap.
Location
🇧🇷Florianopolis SC, Brazil
Dates
30 Aug 2025 → 05 Sept 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Avg top 10
1,586
Participants
23
Federations · 7 represented
🇧🇷Brazil×13
🇵🇾Paraguay×3
🇪🇨Ecuador×2
🇦🇷Argentina×1
🇩🇴Dominican Republic×1
🇺🇸United States of America×1
🇨🇴Colombia×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 9 roundsDarren Wu led from R5; +1.0-point edge over the runner-up.
Co-leaders
11
5
1
1
1
1
1
1
1
R5 · LEADER CHANGE03 Sept
Darren Wu takes the sole lead (4.5/5).
R5 · HEAD-TO-HEAD · WINNER VS 2ND
Darren Wu beat Lucas Cazarim De Oliveira (White).
WIN STREAKS · 2 top finishers
Darren Wu 5 wins (R4–R8)Lucas Cazarim De Oliveira 4 wins (R1–R4)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Darren Wu | * | 1 | ½ | 1 |
| 2Lucas Cazarim De Oliveira | 0 | * | 1 | 1 |
| 3Tomas Casquero | ½ | 0 | * | ½ |
| 4Benjamin Furquim Barbosa | 0 | 0 | ½ | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Wu, Darren | 1602 | USA | +15N | +7B | =4N | +11B | +2B | +3N | +6B | +8B | −5N | 7.5 | 45.0 | 49.5 | 40.50 | 1833 | +100.0 |
| 2 | Oliveira, Lucas Cazarim De | 1725 | BRA | +19N | +9B | +3N | +4B | −1N | +7B | −8N | +11B | =6N | 6.5 | 45.0 | 48.0 | 32.75 | 1719 | +0.4 |
| 3 | Barbosa, Benjamin Furquim | 1603 | BRA | +17B | +14N | −2B | +8N | +6B | −1B | =4N | +13N | =7B | 6.0 | 45.0 | 48.0 | 28.25 | 1687 | +46.8 |
| 4 | Casquero, Tomas | 1680 | ARG | +10B | +13N | =1B | −2N | +14B | +12N | =3B | −7N | +8B | 6.0 | 44.5 | 49.0 | 30.25 | 1668 | -6.0 |
| 5 | Eichtadt, Vinicius Miguel | 1519 | BRA | +22B | =6N | =13B | −7N | +17B | −8N | +10B | +9B | +1B | 6.0 | 41.0 | 42.0 | 26.50 | 1608 | +37.2 |
| 6 | Kortmann, Pedro Reck | 1615 | BRA | +12N | =5B | =11N | +9B | −3N | +15B | −1N | +14B | =2B | 5.5 | 44.5 | 49.0 | 27.00 | 1630 | +8.0 |
| 7 | Dhom Lemos,Frederico M Brescia | 1474 | BRA | F | −1N | +17B | +5B | +11N | −2N | +12B | +4B | =3N | 5.5 | 44.0 | 44.0 | 27.00 | 1715 | +104.8 |
| 8 | Chahuaylla, Diego R Chahuares | 1488 | BRA | +20N | −11B | +15N | −3B | +19N | +5B | +2B | −1N | −4N | 5.0 | 44.0 | 47.0 | 23.00 | 1567 | +31.6 |
| 9 | Almonte Rosario, Bruno Said | 1527 | DOM | +18B | −2N | +10B | −6N | −12N | +20B | +16B | −5N | +17N | 5.0 | 37.0 | 40.0 | 17.50 | 1417 | -36.0 |
| 10 | Toledo Gonzalez, Facundo Josue | 1450 | PAR | −4N | +21B | −9N | +22B | −15N | +23B | −5N | +20B | +12N | 5.0 | 31.5 | 32.0 | 10.50 | 1293 | -38.0 |
| 11 | Ramirez Mejia, Jose Gregorio | 1533 | COL | +23B | +8N | =6B | −1N | −7B | =14N | +17B | −2N | =15B | 4.5 | 42.0 | 42.5 | 15.75 | 1490 | -20.0 |
| 12 | Lino Prieto, Gabriel | 1432 | ECU | −6B | +18N | =14B | +13N | +9B | −4B | −7N | +19N | −10B | 4.5 | 39.0 | 42.0 | 17.75 | 1490 | -12.4 |
| 13 | Turitich Cardozo, Noah Milan | 1531 | PAR | +21N | −4B | =5N | −12B | +16N | =18B | +15N | −3B | =14N | 4.5 | 38.0 | 39.5 | 16.25 | 1416 | -36.4 |
| 14 | Abreu Da Silva, Joaquim Fernando | 1522 | BRA | +16N | −3B | =12N | +19B | −4N | =11B | +18N | −6N | =13B | 4.5 | 37.5 | 40.5 | 16.25 | 1460 | -24.0 |
| 15 | Silva, Gabriel Henry Francisconi | 1419 | BRA | −1B | +22N | −8B | +23N | +10B | −6N | −13B | +18N | =11N | 4.5 | 36.0 | 36.5 | 11.75 | 1344 | -22.8 |
| 16 | Chinchilima Medina, Luis | 0 | ECU | −14B | −17N | +23B | =18N | −13B | F | −9N | +21N | +22B | 3.5 | 23.0 | 23.0 | 4.50 | 700 | 0.0 |
| 17 | Kruk, Nicolas Tonial | 1424 | BRA | −3N | +16B | −7N | +20B | −5N | +19B | −11N | F | −9B | 3.0 | 36.5 | 36.5 | 9.50 | 1244 | -49.2 |
| 18 | FIDE 20066902 | 0 | — | −9N | −12B | +21N | =16B | +22N | =13N | −14B | −15B | F | 3.0 | 29.0 | 29.0 | 6.50 | 1136 | 0.0 |
| 19 | Lugo Martinez, Federico Joaquin | 1473 | PAR | −2B | +23N | +20B | −14N | −8B | −17N | F | −12B | +21N | 3.0 | 28.5 | 28.5 | 5.00 | 735 | -84.0 |
| 20 | Sikorski, Valentim Enrico | 0 | BRA | −8B | F | −19N | −17N | +21B | −9N | +22B | −10N | +23B | 3.0 | 24.0 | 24.0 | 3.00 | 673 | 0.0 |
| 21 | Sbeghen, Davi Pilger | 0 | BRA | −13B | −10N | −18B | F | −20N | +22B | =23N | −16B | −19B | 1.5 | 23.5 | 23.5 | 1.25 | 684 | 0.0 |
| 22 | Naidon, Pietro Weber | 0 | BRA | −5N | −15B | F | −10N | −18B | −21N | −20N | +23B | −16N | 1.0 | 27.0 | 27.0 | 0.50 | 663 | 0.0 |
| 23 | Devis, Antonio | 0 | BRA | −11N | −19B | −16N | −15B | F | −10N | =21B | −22N | −20N | 0.5 | 26.0 | 26.0 | 0.75 | 668 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Dhom Lemos,Frederico M BresciaBRA+104.85.5 pts · #5
- 2Wu, DarrenUSA+100.07.5 pts · #1
- 3Barbosa, Benjamin FurquimBRA+46.86.0 pts · #4
Top rating losers
- 1Lugo Martinez, Federico JoaquinPAR-84.03.0 pts · #23
- 2Kruk, Nicolas TonialBRA-49.23.0 pts · #15
- 3Toledo Gonzalez, Facundo JosuePAR-38.05.0 pts · #16
Biggest upsets
- R7+237 Elo gap
- R8+206 Elo gap
- R5+123 Elo gap