Regional Centro Oeste Amador STD 2025 U1700
25 players participated in this 5-round tournament, held from 13 Nov 2025 to 25 Nov 2025 in Goiania GO, Brazil. Top 10 Elo average was 1622, and top seed was Pedro Hitiro Matsunaga (🇧🇷 BRA, 1699).
Richard Da Silva Castilho (🇧🇷 BRA, 0) won with 4.5/5, ahead of Francisco A Barrozo De Siqueira (4.5) and Felipe Teles Barros (4.0). Castilho won on tie-break after catching the field in the final round.
The biggest upset came in round 2: Ramon Italo Mendonca Martins (1448) beat Frederico Cavalcante Guerra (1614), a +166-point gap.
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How it unfolded
Top 6 · 5 roundsTight race until R4; 2 players tied at 4.5/5, decided on Buchholz.
Francisco A Barrozo De Siqueira held the sole lead from R4 through R5 without losing it.
2 players finish on 4.5/5. Castilho takes the title on Buchholz Cut1 (13.5).
Francisco A Barrozo De Siqueira won 4 in a row (R1–R4).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Francisco A Barrozo De Siqueira | * | — | ½ | 1 |
| 2Richard Da Silva Castilho | — | * | ½ | — |
| 3Felipe Teles Barros | ½ | ½ | * | — |
| 4Carlos Henrique de Alarcao Maia | 0 | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Castilho, Richard Da Silva | 0 | BRA | +5N | +20B | =3N | +9B | +7N | 4.5 | 13.5 | 14.5 | 12.50 | 1698 | 0.0 |
| 2 | De Siqueira, Francisco A Barrozo | 0 | BRA | +10N | +18B | +11N | +4B | =3N | 4.5 | 12.0 | 13.0 | 11.00 | 1634 | 0.0 |
| 3 | Barros, Felipe Teles | 1692 | BRA | +23B | +19N | =1B | +18N | =2B | 4.0 | 11.0 | 11.0 | 6.50 | 2403 | +7.6 |
| 4 | Maia, Carlos Henrique de Alarcao | 0 | BRA | +8B | +?N | +16B | −2N | =6B | 3.5 | 12.0 | 12.0 | 6.00 | 1674 | 0.0 |
| 5 | Hitiro Matsunaga, Pedro | 1699 | BRA | −1B | +23N | +12N | =16B | +10N | 3.5 | 10.5 | 10.5 | 5.25 | 1812 | +7.4 |
| 6 | Assan, Nasser Charif | 1620 | BRA | =13N | =17B | =10N | +12B | =4N | 3.0 | 10.0 | 11.5 | 6.75 | 1659 | +6.0 |
| 7 | Filho, Marcos Antonio Correa | 0 | BRA | +14B | −16N | +15B | +?N | −1B | 3.0 | 10.0 | 10.0 | 4.00 | 1615 | 0.0 |
| 8 | De Morais, Pedro Castro | 1696 | BRA | −4N | +13B | −17N | +21B | +16N | 3.0 | 8.5 | 9.5 | 4.50 | 1546 | -16.0 |
| 9 | Mendes, Caio Franco | 1581 | BRA | −19B | +21N | +24B | −1N | +18B | 3.0 | 7.5 | 7.5 | 2.00 | 2403 | +10.6 |
| 10 | Martins, Ramon Italo Mendonca | 1448 | BRA | −2B | +14N | =6B | +23N | −5B | 2.5 | 13.0 | 13.0 | 3.50 | 1645 | +30.4 |
| 11 | Xavier, Lana Evellyn Santos | 1550 | BRA | F | +22N | −2B | =13B | =12N | 2.0 | 9.0 | 9.0 | 2.50 | 1615 | +3.6 |
| 12 | Gasperini, Giordanna Novaes | 1615 | BRA | =22B | +25N | −5B | −6N | =11B | 2.0 | 9.0 | 9.0 | 1.25 | 1487 | -28.0 |
| 13 | Assan, Lucio Charif Medina | 0 | BRA | =6B | −8N | +25B | =11N | −?B | 2.0 | 8.0 | 8.0 | 2.50 | 1504 | 0.0 |
| 14 | Guerra, Frederico Cavalcante | 1614 | BRA | −7N | −10B | +22B | +24N | −20B | 2.0 | 7.0 | 7.0 | 0.50 | 649 | -14.4 |
| 15 | Carvalho, Abraao | 1547 | BRA | F | F | −7N | +25B | +24B | 2.0 | 3.0 | 3.0 | 0.00 | 2227 | +13.6 |
| 16 | Morgado, Anderson Alves | 1552 | BRA | F | +7B | −4N | =5N | −8B | 1.5 | 13.0 | 13.0 | 4.75 | 1506 | -4.4 |
| 17 | Silva, Maria Vitoria de Sousa | 1539 | BRA | F | =6N | +8B | F | F | 1.5 | 6.0 | 6.0 | 4.50 | 1852 | +32.8 |
| 18 | Roeder, Inacio Clacier | 1602 | BRA | +21B | −2N | F | −3B | −9N | 1.0 | 12.5 | 13.5 | 1.00 | 837 | -36.4 |
| 19 | Angosto Pierre, Tomas Benfica | 0 | BRA | +9N | −3B | F | F | F | 1.0 | 8.0 | 8.0 | 3.00 | 1637 | 0.0 |
| 20 | Coelho, Marco Tulio Ferreira | 0 | BRA | F | −1N | −?B | F | +14N | 1.0 | 7.0 | 7.0 | 2.00 | 1600 | 0.0 |
| 21 | Sales, Pedro Lucas Souza | 0 | BRA | −18N | −9B | F | −8N | +23B | 1.0 | 7.0 | 7.0 | 0.00 | 827 | 0.0 |
| 22 | Cardoso, Guilherme Gomes | 0 | BRA | =12N | −11B | −14N | F | F | 0.5 | 7.0 | 7.0 | 1.00 | 1320 | 0.0 |
| 23 | Sales, Gabriel Souza | 0 | BRA | −3N | −5B | F | −10B | −21N | 0.0 | 11.0 | 11.0 | 0.00 | 814 | 0.0 |
| 24 | FIDE 538054990 | 0 | — | −?B | F | −9N | −14B | −15N | 0.0 | 7.0 | 7.0 | 0.00 | 782 | 0.0 |
| 25 | Da Silva, Fabio De Moraes Vaz | 1425 | BRA | F | −12B | −13N | −15N | F | 0.0 | 6.0 | 6.0 | 0.00 | 781 | -12.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Silva, Maria Vitoria de SousaBRA+32.81.5 pts · #10
- 2Martins, Ramon Italo MendoncaBRA+30.42.5 pts · #8
- 3Carvalho, AbraaoBRA+13.62.0 pts · #15
- 1Roeder, Inacio ClacierBRA-36.41.0 pts · #20
- 2Gasperini, Giordanna NovaesBRA-28.02.0 pts · #9
- 3De Morais, Pedro CastroBRA-16.03.0 pts · #12
- R2+166 Elo gap
- R3+157 Elo gap