Aberto do Brasil 2025 da Cidade de Rio Branco AC
Open SwissStandard
68 players participated in this 6-round tournament, held on 20 Nov 2025 in Rio Branco AC, Brazil. 3 federations represented. Top 10 Elo average was 1888, and top seed was Gabriel Carckeno Do Carmo (🇧🇷 BRA, 2045).
Mateus Nascimento De Souza (🇧🇷 BRA, 1879) won with 5.5/6, ahead of Antonio Alves Leitao Neto (5.5) and Leandro Rafael Gomez Berrocal (5.0). De Souza won on tie-break after catching the field in the final round.
The biggest upset came in round 4: Delvin Antonini Quispe Mayta (1435) beat Yvan Lukas Bertoldo Araujo (1705), a +270-point gap.
Location
🇧🇷Rio Branco AC, Brazil
Dates
20 Nov 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 6 rounds
Federations · 3 represented
🇧🇷Brazil×29
🇵🇪Peru×10
🇧🇴Bolivia×2
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsTight race until R6; 2 players tied at 5.5/6, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.
Co-leaders
34
16
8
3
1
2
R6 · TIEBREAK CLUSTER
2 players finish on 5.5/6. De Souza takes the title on Buchholz Cut1 (22.0).
WIN STREAKS · 3 top finishers
Mateus Nascimento De Souza 4 wins (R3–R6)Antonio Alves Leitao Neto 5 wins (R1–R5)Gabriel Carckeno Do Carmo 3 wins (R1–R3)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Mateus Nascimento De Souza | * | — | — | 1 |
| 2Antonio Alves Leitao Neto | — | * | — | — |
| 3Gabriel Carckeno Do Carmo | — | — | * | — |
| 4Ronaldo Manuel Abarca Torres | 0 | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | De Souza, Mateus Nascimento | 1879 | BRA | +35B | =3N | +17B | +14N | +6B | +10N | 5.5 | 22.0 | 25.0 | 22.50 | 2151 | +58.0 |
| 2 | Leitao Neto, Antonio Alves | 1972 | BRA | +59N | +8B | +30N | +29B | +4B | =3N | 5.5 | 20.5 | 21.5 | 19.00 | 2080 | +9.8 |
| 3 | Gomez Berrocal, Leandro Rafael | 1515 | PER | +43N | =1B | +23N | +30B | +7N | =2B | 5.0 | 22.0 | 24.0 | 18.50 | 1979 | +89.6 |
| 4 | Cardoso Junior, Sabino Jose | 1836 | BRA | +44B | +33N | +15B | +5B | −2N | +16N | 5.0 | 21.5 | 23.5 | 18.00 | 2030 | +20.0 |
| 5 | Do Carmo, Gabriel Carckeno | 2045 | BRA | +20B | +40N | +14B | −4N | +11B | +15N | 5.0 | 21.0 | 23.5 | 18.50 | 2000 | -3.2 |
| 6 | Abarca Torres, Ronaldo Manuel | 1794 | PER | +60N | +32B | +9N | +10B | −1N | +12B | 5.0 | 21.0 | 22.0 | 16.50 | 1994 | +25.0 |
| 7 | Amorim Filho, Robson Bezerra | 1652 | BRA | +53B | +17N | +24B | =11N | −3B | +23N | 4.5 | 20.0 | 22.0 | 15.00 | 1841 | +19.4 |
| 8 | Torrico Castro, Raikonen Dairo | 1659 | BOL | +38B | −2N | +35B | =25N | +26B | +24N | 4.5 | 19.0 | 22.0 | 14.75 | 1880 | +33.2 |
| 9 | Silva, Joao Vitor Maximiano | 1681 | BRA | +49B | +56N | −6B | +33N | +13B | =11N | 4.5 | 18.0 | 19.5 | 12.50 | 1638 | -4.4 |
| 10 | Da Silva, Ricardo Moura | 1956 | BRA | +45B | +16N | +18B | −6N | +37B | −1B | 4.0 | 21.5 | 23.5 | 13.00 | 1799 | -17.4 |
| 11 | Oliveira, Reginaldo Sousa | 1867 | BRA | +41N | +37B | +12N | =7B | −5N | =9B | 4.0 | 21.0 | 23.5 | 14.00 | 1808 | -6.8 |
| 12 | Sanz Lucas, Edward | 1693 | PER | +63B | +19N | −11B | +22N | +32B | −6N | 4.0 | 20.0 | 20.5 | 11.50 | 1616 | -12.4 |
| 13 | Da Silva, Elson Ruben Gomes | 0 | BRA | +?B | −18N | +19B | +21N | −9N | +30B | 4.0 | 19.5 | 19.5 | 11.00 | 1689 | 0.0 |
| 14 | Espinoza Yucra, Junior Anthony Josely | 1752 | PER | +65N | +31B | −5N | −1B | +34N | +36B | 4.0 | 19.5 | 19.5 | 9.00 | 1662 | -13.6 |
| 15 | Dos Santos, Edson Gomes | 1686 | BRA | +67N | +34B | −4N | +36B | +31N | −5B | 4.0 | 19.0 | 19.0 | 9.00 | 1648 | -4.2 |
| 16 | De Araujo, Antonio Marcos Diniz | 1648 | BRA | +57N | −10B | +44N | +20B | +29N | −4B | 4.0 | 18.0 | 19.5 | 10.50 | 1740 | +6.4 |
| 17 | Da Silva De Sena, Jefferson Ryan F | 1906 | BRA | +55N | −7B | −1N | +57B | +35N | +31B | 4.0 | 17.5 | 19.0 | 9.00 | 1554 | -25.4 |
| 18 | Araujo, Yvan Lukas Bertoldo | 1705 | BRA | +68N | +13B | −10N | −31B | +25B | +51N | 4.0 | 16.5 | 16.5 | 9.50 | 897 | -40.8 |
| 19 | Ueda, Lucas Kentaro | 0 | BRA | +36N | −12B | −13N | +60B | +45B | +32N | 4.0 | 16.0 | 17.0 | 9.00 | 1627 | 0.0 |
| 20 | Cardoso, Kamilla Helmann | 0 | BRA | −5N | +47B | +56B | −16N | +?B | +37N | 4.0 | 15.5 | 15.5 | 6.50 | 1641 | 0.0 |
| 21 | Maciel Junior, Joao Edson Costa | 1671 | BRA | +47N | +61B | −29N | −13B | +38N | +33B | 4.0 | 15.0 | 16.0 | 9.00 | 1004 | -12.8 |
| 22 | Nascimento, Douglas Cunha | 0 | BRA | −61N | +67B | +34N | −12B | +58N | +29B | 4.0 | 12.5 | 12.5 | 7.50 | 1749 | 0.0 |
| 23 | Ricarte, Maria Alice Damasio | 0 | BRA | +?B | =24N | −3B | +28N | +27B | −7B | 3.5 | 20.0 | 20.0 | 8.75 | 1583 | 0.0 |
| 24 | Kohagura Arrunategui, Jose Andres Hideki | 1694 | PER | +39N | =23B | −7N | +55B | +40N | −8B | 3.5 | 18.0 | 19.5 | 8.75 | 1531 | -26.4 |
| 25 | Da Silva, Igor Diore Palza Porfir | 0 | BRA | +42N | −29B | +43N | =8B | −18N | +50B | 3.5 | 16.0 | 18.0 | 8.75 | 1450 | 0.0 |
| 26 | De Oliveira, Luiz Carlos | 1599 | BRA | +52N | F | =28B | +42B | −8N | +41B | 3.5 | 15.0 | 15.0 | 8.75 | 859 | -8.4 |
| 27 | Sturza, Vernei Dutra | 1818 | BRA | −34N | +50B | =55N | +41B | −23N | +40B | 3.5 | 13.5 | 15.0 | 7.75 | 2457 | +11.6 |
| 28 | Ticona Cutire, Dayron Yuri | 0 | PER | −30N | +?B | =26N | −23B | +55N | +59B | 3.5 | 12.5 | 12.5 | 4.25 | 1456 | 0.0 |
| 29 | Fiori,Luis Eduardo | 1804 | BRA | +54B | +25N | +21B | −2N | −16B | −22N | 3.0 | 21.0 | 23.0 | 9.50 | 1638 | -13.4 |
| 30 | Arantes, Michael Silva | 1698 | BRA | +28B | +66N | −2B | −3N | +47B | −13N | 3.0 | 20.0 | 20.0 | 5.50 | 944 | -36.4 |
| 31 | Quispe Mayta, Delvin Antonini | 1435 | PER | +48B | −14N | +46B | +18N | −15B | −17N | 3.0 | 18.0 | 20.0 | 8.00 | 1552 | +16.8 |
| 32 | Lourenco, Vanda Goncalves | 1560 | BRA | +46B | −6N | +38B | +45N | −12N | −19B | 3.0 | 18.0 | 20.0 | 7.00 | 944 | -21.2 |
| 33 | FIDE 538047284 | 0 | — | +?N | −4B | +39N | −9B | +56B | −21N | 3.0 | 18.0 | 18.0 | 4.50 | 929 | 0.0 |
| 34 | Brandao, Asaffe Daniel O | 0 | BRA | +27B | −15N | −22B | +48N | −14B | +46N | 3.0 | 17.5 | 19.5 | 7.50 | 1627 | 0.0 |
| 35 | FIDE 3365093 | 0 | — | −1N | +57B | −8N | +62B | −17B | +53N | 3.0 | 17.5 | 18.5 | 4.50 | 1015 | 0.0 |
| 36 | FIDE 538073242 | 0 | — | −19B | +49N | +48B | −15N | +46B | −14N | 3.0 | 16.0 | 18.0 | 6.00 | 919 | 0.0 |
| 37 | Neri, Laura da Cunha | 1608 | BRA | +62B | −11N | +66B | +51N | −10N | −20B | 3.0 | 15.0 | 15.0 | 3.00 | 1112 | -11.6 |
| 38 | Bonner, Isabela Meneses | 0 | BRA | −8N | +59B | −32N | +43B | −21B | +?N | 3.0 | 14.5 | 14.5 | 3.00 | 830 | 0.0 |
| 39 | Ccahuana Huillca, Gary Gandhi Newman | 0 | PER | −24B | +?N | −33B | −56N | +61B | +48N | 3.0 | 11.0 | 11.0 | 3.00 | 894 | 0.0 |
| 40 | Souza , Neurismar Da Rocha | 1657 | BRA | +58N | −5B | =41N | +50B | −24B | −27N | 2.5 | 16.5 | 18.0 | 4.75 | 1053 | -16.6 |
| 41 | Gutierrez Leon, Andre Fabrizio | 0 | PER | −11B | +62N | =40B | −27N | +42B | −26N | 2.5 | 16.0 | 17.0 | 4.75 | 1414 | 0.0 |
| 42 | Bocanegra Galvez, Renzo Antonio | 0 | PER | −25B | =63N | +59B | −26N | −41N | +55B | 2.5 | 12.0 | 12.5 | 2.75 | 799 | 0.0 |
| 43 | FIDE 81479166 | 0 | — | −3B | +64N | −25B | −38N | +49B | −47N | 2.0 | 15.5 | 16.0 | 2.50 | 715 | 0.0 |
| 44 | FIDE 538047195 | 0 | — | −4N | +52B | −16B | −46N | −50N | +61B | 2.0 | 15.0 | 16.0 | 3.00 | 941 | 0.0 |
| 45 | FIDE 3371484 | 0 | — | −10N | +58B | F | −32B | −19N | +52B | 2.0 | 14.5 | 14.5 | 3.50 | 958 | 0.0 |
| 46 | FIDE 538073153 | 0 | — | −32N | +60B | −31N | +44B | −36N | −34B | 2.0 | 14.0 | 15.0 | 3.00 | 699 | 0.0 |
| 47 | FIDE 538073196 | 0 | — | −21B | −20N | +?B | F | −30N | +43B | 2.0 | 13.0 | 13.0 | 2.00 | 885 | 0.0 |
| 48 | FIDE 81452560 | 0 | — | −31N | +68B | −36N | −34B | +60N | −39B | 2.0 | 13.0 | 13.0 | 1.00 | 637 | 0.0 |
| 49 | FIDE 3364933 | 0 | — | −9N | −36B | −?N | +54B | −43N | +60B | 2.0 | 12.5 | 12.5 | 3.00 | 881 | 0.0 |
| 50 | FIDE 538073137 | 0 | — | F | −27N | +63B | −40N | +44B | −25N | 2.0 | 12.0 | 12.0 | 2.50 | 938 | 0.0 |
| 51 | FIDE 538013860 | 0 | — | F | −?B | +61N | −37B | +52N | −18B | 2.0 | 10.0 | 10.0 | 3.00 | 885 | 0.0 |
| 52 | FIDE 538073145 | 0 | — | −26B | −44N | +64B | +66N | −51B | −45N | 2.0 | 10.0 | 10.0 | 0.50 | 799 | 0.0 |
| 53 | FIDE 538047276 | 0 | — | −7N | −55B | −60N | +65B | +?N | −35B | 2.0 | 10.0 | 10.0 | 0.00 | 852 | 0.0 |
| 54 | FIDE 538073129 | 0 | — | −29N | F | −58B | −49N | +64B | +65N | 2.0 | 7.0 | 7.0 | 0.50 | 1004 | 0.0 |
| 55 | Morales Escobar, Alexander Jose | 0 | BOL | −17B | +53N | =27B | −24N | −28B | −42N | 1.5 | 17.0 | 19.0 | 3.75 | 1533 | 0.0 |
| 56 | FIDE 3364887 | 0 | — | F | −9B | −20N | +39B | −33N | =58B | 1.5 | 16.0 | 16.0 | 3.75 | 881 | 0.0 |
| 57 | FIDE 81480148 | 0 | — | −16B | −35N | +65B | −17N | −59N | =64B | 1.5 | 12.5 | 12.5 | 0.25 | 976 | 0.0 |
| 58 | FIDE 538073226 | 0 | — | −40B | −45N | +54N | F | −22B | =56N | 1.5 | 12.0 | 13.0 | 2.75 | 857 | 0.0 |
| 59 | Cardoso, Adalzisa Noemia Helmann | 0 | BRA | −2B | −38N | −42N | F | +57B | −28N | 1.0 | 16.0 | 16.0 | 1.50 | 1172 | 0.0 |
| 60 | FIDE 81476159 | 0 | — | −6B | −46N | +53B | −19N | −48B | −49N | 1.0 | 15.0 | 17.0 | 2.00 | 994 | 0.0 |
| 61 | FIDE 538047187 | 0 | — | +22B | −21N | −51B | F | −39N | −44N | 1.0 | 15.0 | 16.5 | 4.00 | 871 | 0.0 |
| 62 | FIDE 538073188 | 0 | — | −37N | −41B | F | −35N | +66B | −?N | 1.0 | 8.5 | 8.5 | 0.00 | 875 | 0.0 |
| 63 | FIDE 538073277 | 0 | — | −12N | =42B | −50N | F | F | F | 0.5 | 8.5 | 8.5 | 1.25 | 893 | 0.0 |
| 64 | FIDE 538073170 | 0 | — | −?N | −43B | −52N | −?B | −54N | =57N | 0.5 | 7.5 | 7.5 | 0.75 | 942 | 0.0 |
| 65 | FIDE 538073269 | 0 | — | −14B | F | −57N | −53N | F | −54B | 0.0 | 9.5 | 9.5 | 0.00 | 952 | 0.0 |
| 66 | FIDE 538073200 | 0 | — | F | −30B | −37N | −52B | −62N | −?N | 0.0 | 9.0 | 9.0 | 0.00 | 853 | 0.0 |
| 67 | FIDE 538073218 | 0 | — | −15B | −22N | F | F | F | F | 0.0 | 8.0 | 8.0 | 0.00 | 886 | 0.0 |
| 68 | FIDE 538073234 | 0 | — | −18B | −48N | F | F | F | F | 0.0 | 8.0 | 8.0 | 0.00 | 905 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Gomez Berrocal, Leandro RafaelPER+89.65.0 pts · #5
- 2De Souza, Mateus NascimentoBRA+58.05.5 pts · #1
- 3Torrico Castro, Raikonen DairoBOL+33.24.5 pts · #10
Top rating losers
- 1Araujo, Yvan Lukas BertoldoBRA-40.84.0 pts · #34
- 2Arantes, Michael SilvaBRA-36.43.0 pts · #58
- 3Kohagura Arrunategui, Jose Andres HidekiPER-26.43.5 pts · #19
Biggest upsets
- R4+270 Elo gap
- R2+254 Elo gap
- R4+209 Elo gap