VIII Maraba Chess Open STD 2025
Open SwissStandard
61 players participated in this 7-round tournament, held from 19 Jun 2025 to 22 Jun 2025 in Maraba PA, Brazil. 5 titled players. Top 10 Elo average was 2168, and top seed was Everaldo Matsuura (🇧🇷 BRA, GM, 2364).
Juliana Sayumi Terao (🇧🇷 BRA, FM, 2229) won with 6.0/7, ahead of Everaldo Matsuura (6.0) and Luigy Lira De Siqueira (6.0). Terao took the lead from round 6, winning on tie-break.
The biggest upset came in round 2: Diogo Godoy (1765) beat Marcelo Cunha Guimaraes (2064), a +299-point gap.
Location
🇧🇷Maraba PA, Brazil
Dates
19 Jun 2025 → 22 Jun 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 7 rounds
Titled players · 5
GM×1
FM×3
CM×1
Federations · 1 represented
🇧🇷Brazil×51
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsTight race until R6; 3 players tied at 6.0/7, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 3 at the finish.
Co-leaders
23
14
7
2
1
1
3
R6 · LEADER CHANGE22 Jun
FM Juliana Sayumi Terao takes the sole lead (5.5/6).
R7 · TIEBREAK CLUSTER
3 players finish on 6.0/7. Terao takes the title on Buchholz Cut1 (30.5).
R6 · HEAD-TO-HEAD · WINNER VS 2ND
FM Juliana Sayumi Terao beat FM Luigy Lira De Siqueira (White).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1FMJuliana Sayumi Terao | * | 1 | — | ½ |
| 2FMLuigy Lira De Siqueira | 0 | * | 1 | — |
| 3GMEveraldo Matsuura | — | 0 | * | 1 |
| 4Allysson Pereira Chaves | ½ | — | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Terao, Juliana SayumiFM | 2229 | BRA | +16N | +10B | +14N | =4B | +6N | +3B | =5N | 6.0 | 30.5 | 34.5 | 29.00 | 2371 | +22.8 |
| 2 | Matsuura, EveraldoGM | 2364 | BRA | +44N | +49B | +5N | +6B | −3N | +4B | +7N | 6.0 | 29.5 | 31.5 | 25.50 | 2413 | +3.9 |
| 3 | De Siqueira, Luigy LiraFM | 2324 | BRA | +52B | +27N | +13B | +7N | +2B | −1N | +8B | 6.0 | 29.5 | 31.0 | 25.00 | 2418 | +15.4 |
| 4 | Chaves, Allysson Pereira | 2135 | BRA | +34B | +35N | +33B | =1N | +15B | −2N | +13N | 5.5 | 26.0 | 29.0 | 20.00 | 2258 | +22.8 |
| 5 | Mafra, Kaiser LuizCM | 2076 | BRA | +53B | +45N | −2B | +36N | +35B | +9N | =1B | 5.5 | 24.5 | 26.0 | 17.00 | 2196 | +22.4 |
| 6 | Costa, Diogenes Everton Nunes | 2165 | BRA | +24B | +29N | +9B | −2N | −1B | +45N | +33B | 5.0 | 27.0 | 29.0 | 17.00 | 2162 | +4.8 |
| 7 | Azevedo Junior, Jose Ferreira | 2102 | BRA | +25N | +26B | +32N | −3B | +49N | +14B | −2B | 5.0 | 27.0 | 29.0 | 17.00 | 2172 | +15.8 |
| 8 | Rocha, Vitor Firmo de Souza | 2152 | BRA | +23N | +20B | −12N | +28B | +33N | +13B | −3N | 5.0 | 26.0 | 29.0 | 18.50 | 2131 | +0.8 |
| 9 | Pontes,Israel Fillip da Silva | 2048 | BRA | +39N | +42B | −6N | +22B | +18N | −5B | =10N | 4.5 | 26.0 | 28.5 | 15.75 | 1922 | -14.8 |
| 10 | Albuquerque, Antonio Lazaro | 1872 | BRA | +59B | −1N | +34B | +37N | −13B | +36N | =9B | 4.5 | 23.5 | 23.5 | 11.25 | 1945 | +8.4 |
| 11 | Guimaraes, Marcelo Cunha | 2064 | BRA | +21B | −51N | +31N | =26B | +28N | =12B | =32N | 4.5 | 22.5 | 24.5 | 16.75 | 1911 | -21.2 |
| 12 | Macedo, Maximo ValerioFM | 1958 | BRA | +61B | +48N | +8B | −15N | =30B | =11N | =26N | 4.5 | 22.5 | 22.5 | 12.75 | 1955 | -1.0 |
| 13 | Luz, Edmundo Reis | 2069 | BRA | +47N | +22B | −3N | +20B | +10N | −8N | −4B | 4.0 | 29.0 | 31.0 | 14.50 | 2014 | -6.2 |
| 14 | Cunha,Adriano de Jesus Silva | 2029 | BRA | +18B | +30N | −1B | F | +16N | −7N | +17B | 4.0 | 26.5 | 28.5 | 15.50 | 2004 | -0.2 |
| 15 | Teixeira, Lindberg Rego | 1995 | BRA | F | =31B | +38N | +12B | −4N | =26B | +16N | 4.0 | 24.0 | 25.0 | 15.00 | 1936 | -5.6 |
| 16 | De Andrade, Isadora V Goncalves | 1666 | BRA | −1B | +40N | +54B | +27N | −14B | +29N | −15B | 4.0 | 24.0 | 25.0 | 11.00 | 1899 | +50.4 |
| 17 | Abreu, Nilton Silva | 1938 | BRA | F | −28B | +55N | +39B | +23N | +22B | −14N | 4.0 | 20.5 | 21.5 | 12.00 | 1821 | -10.8 |
| 18 | Santos, Hugo Silva | 0 | BRA | −14N | F | +45B | +29N | −9B | +35N | +28B | 4.0 | 20.5 | 20.5 | 12.00 | 1960 | 0.0 |
| 19 | Sa, Pollyclessio Mota | 0 | BRA | −33B | −36N | +46B | +24N | =27B | +42N | =29B | 4.0 | 19.5 | 21.5 | 12.00 | 1808 | 0.0 |
| 20 | Almeida, Talita Medrado | 1848 | BRA | +46B | −8N | +47B | −13N | −34B | +48N | +37B | 4.0 | 19.0 | 21.0 | 9.00 | 1637 | -21.0 |
| 21 | Reis, Davi Vieira | 0 | BRA | −11N | +50B | −26N | =52B | +38B | =37N | +36B | 4.0 | 19.0 | 20.5 | 10.25 | 1755 | 0.0 |
| 22 | Carrias, Zidane Nobrega | 1751 | BRA | +58B | −13N | +56B | −9N | +47B | −17N | +34B | 4.0 | 18.5 | 19.5 | 7.00 | 1759 | -2.0 |
| 23 | Silva, Mauricio Barbosa | 1597 | BRA | −8B | +59N | −49N | +57B | −17B | +40N | +35B | 4.0 | 18.0 | 18.0 | 7.00 | 1732 | +19.2 |
| 24 | Junior, Gily Vileneve A Piaui | 1608 | BRA | −6N | −43B | +50N | −19B | +57N | +54B | +39N | 4.0 | 17.5 | 18.5 | 7.00 | 1208 | -3.2 |
| 25 | Luz, Kaio Ferreira | 1558 | BRA | −7B | +46N | −27B | +56N | −29B | +58N | +45B | 4.0 | 17.0 | 18.0 | 6.00 | 1688 | +18.4 |
| 26 | Da Cruz, Kadmiel Asafhe Mourao | 1838 | BRA | F | −7N | +21B | =11N | +31B | =15N | =12B | 3.5 | 25.5 | 25.5 | 14.00 | 1968 | +32.8 |
| 27 | Batista, Francisco De Araujo | 1892 | BRA | F | −3B | +25N | −16B | =19N | +52B | +30N | 3.5 | 24.5 | 26.0 | 11.00 | 1857 | -4.8 |
| 28 | De Sousa, Jadson Alves | 1908 | BRA | =37B | +17N | +51B | −8N | −11B | +31N | −18N | 3.5 | 24.0 | 26.0 | 11.00 | 1999 | +12.2 |
| 29 | Nunes, Joao Paulo Santos | 1873 | BRA | +43N | −6B | +53N | −18B | +25N | −16B | =19N | 3.5 | 23.5 | 25.0 | 10.00 | 1733 | -26.4 |
| 30 | Lima, Saymon Barreira | 1727 | BRA | +41N | −14B | +57N | +32B | =12N | F | −27B | 3.5 | 21.5 | 22.5 | 9.75 | 1868 | +25.2 |
| 31 | Brandalise, Ricardo | 1714 | BRA | +60B | =15N | −11B | +38N | −26N | −28B | +47B | 3.5 | 20.5 | 20.5 | 7.00 | 1713 | -4.8 |
| 32 | Dos Santos, Lucas Vinicius Monte | 1932 | BRA | F | +54N | −7B | −30N | +44B | +34N | =11B | 3.5 | 19.5 | 19.5 | 8.75 | 1837 | -21.2 |
| 33 | De Oliveira, Edilson Rufino | 1946 | BRA | +19N | +57B | −4N | +42B | −8B | F | −6N | 3.0 | 25.5 | 26.5 | 7.50 | 1856 | -9.4 |
| 34 | Santos, Lucas Aires | 1594 | BRA | −4N | +55B | −10N | +41B | +20N | −32B | −22N | 3.0 | 24.5 | 25.5 | 8.00 | 1639 | +6.0 |
| 35 | Ramos, Janclei Mendes | 1859 | BRA | +55N | −4B | +39N | +43B | −5N | −18B | −23N | 3.0 | 24.5 | 25.5 | 6.50 | 1136 | -48.4 |
| 36 | Costa, Rangel Cavalcante | 1786 | BRA | −38N | +19B | +61N | −5B | +54N | −10B | −21N | 3.0 | 22.0 | 22.0 | 5.00 | 1175 | -21.2 |
| 37 | Kunz, Joao Alfredo Sokolowski | 0 | BRA | =28N | =38B | +52N | −10B | =42N | =21B | −20N | 3.0 | 21.5 | 23.0 | 8.00 | 1738 | 0.0 |
| 38 | Barros, Nicolas Augusto Laborda | 0 | BRA | +36B | =37N | −15B | −31B | −21N | =53N | +60B | 3.0 | 19.0 | 19.0 | 5.25 | 1672 | 0.0 |
| 39 | De Lucena,Davi Aragao | 0 | BRA | −9B | +58N | −35B | −17N | +46B | +60N | −24B | 3.0 | 18.5 | 18.5 | 3.00 | 1063 | 0.0 |
| 40 | De Almeida, Lucas Araujo | 0 | BRA | F | −16B | −43N | +50B | +53N | −23B | +54N | 3.0 | 17.5 | 18.5 | 4.50 | 1477 | 0.0 |
| 41 | Silva, Ronelson Campelo | 0 | BRA | −30B | −56N | +59B | −34N | +55B | −47N | +46B | 3.0 | 12.5 | 12.5 | 3.00 | 809 | 0.0 |
| 42 | De Oliveira, Gualter Amelio | 1744 | BRA | F | −9N | +48B | −33N | =37B | −19B | +43N | 2.5 | 19.0 | 19.0 | 6.00 | 1197 | -7.6 |
| 43 | Aguiar, Eduardo Barros | 0 | BRA | −29B | +24N | +40B | −35N | −45B | =44N | −42B | 2.5 | 18.5 | 20.5 | 8.25 | 1571 | 0.0 |
| 44 | Ornelas, Ester Queiroz | 1697 | BRA | −2B | F | +60N | −49B | −32N | =43B | +52N | 2.5 | 15.5 | 15.5 | 2.75 | 1711 | -1.6 |
| 45 | Ornelas, Joao Pedro Queiroz | 1802 | BRA | F | −5B | −18N | +61B | +43N | −6B | −25N | 2.0 | 21.0 | 21.0 | 2.50 | 1133 | -42.8 |
| 46 | FIDE 44788150 | 0 | — | −20N | −25B | −19N | +55B | −39N | +50B | −41N | 2.0 | 20.0 | 21.0 | 3.00 | 903 | 0.0 |
| 47 | Goncalves, Maria Talissa Neves | 1506 | BRA | −13B | F | −20N | +60B | −22N | +41B | −31N | 2.0 | 18.5 | 18.5 | 3.00 | 1005 | -25.2 |
| 48 | Ornelas, Samuel Queiroz | 0 | BRA | F | −12B | −42N | +53B | −52N | −20B | +58N | 2.0 | 18.0 | 19.0 | 2.50 | 1516 | 0.0 |
| 49 | Pinto Filho, Joao Moreira | 1907 | BRA | F | −2N | +23B | +44N | −7B | F | F | 2.0 | 17.5 | 17.5 | 6.50 | 1926 | +0.8 |
| 50 | FIDE 538044544 | 0 | — | −51B | −21N | −24B | −40N | +59B | −46N | +55B | 2.0 | 16.0 | 16.0 | 1.00 | 887 | 0.0 |
| 51 | Godoy, Diogo | 1765 | BRA | +50N | +11B | −28N | F | F | F | F | 2.0 | 14.0 | 14.0 | 6.50 | 1986 | +21.6 |
| 52 | Lopes, Marcos Alcantara | 1680 | BRA | −3N | F | −37B | =21N | +48B | −27N | −44B | 1.5 | 21.0 | 21.0 | 4.00 | 1090 | -31.6 |
| 53 | Medrado, Vitor Fael Barros | 1542 | BRA | −5N | F | −29B | −48N | −40B | =38B | +61N | 1.5 | 17.0 | 17.0 | 1.50 | 1108 | -8.0 |
| 54 | FIDE 538044579 | 0 | — | F | −32B | −16N | +59N | −36B | −24N | −40B | 1.0 | 17.5 | 17.5 | 0.00 | 948 | 0.0 |
| 55 | FIDE 538015528 | 0 | — | −35B | −34N | −17B | −46N | −41N | +59B | −50N | 1.0 | 17.0 | 17.0 | 0.00 | 997 | 0.0 |
| 56 | FIDE 538044510 | 0 | — | F | +41B | −22N | −25B | F | F | F | 1.0 | 15.0 | 15.0 | 3.00 | 855 | 0.0 |
| 57 | FIDE 538044536 | 0 | — | F | −33N | −30B | −23N | −24B | F | +59N | 1.0 | 14.5 | 14.5 | 0.00 | 920 | 0.0 |
| 58 | FIDE 538044552 | 0 | — | −22N | −39B | F | F | +61N | −25B | −48B | 1.0 | 13.0 | 13.0 | 0.00 | 855 | 0.0 |
| 59 | FIDE 538015986 | 0 | — | −10N | −23B | −41N | −54B | −50N | −55N | −57B | 0.0 | 15.5 | 16.5 | 0.00 | 935 | 0.0 |
| 60 | FIDE 538044587 | 0 | — | −31N | F | −44B | −47N | F | −39B | −38N | 0.0 | 15.0 | 15.0 | 0.00 | 839 | 0.0 |
| 61 | FIDE 538015960 | 0 | — | −12N | F | −36B | −45N | −58B | F | −53B | 0.0 | 13.0 | 13.0 | 0.00 | 974 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1De Andrade, Isadora V GoncalvesBRA+50.44.0 pts · #24
- 2Da Cruz, Kadmiel Asafhe MouraoBRA+32.83.5 pts · #19
- 3Lima, Saymon BarreiraBRA+25.23.5 pts · #30
Top rating losers
- 1Ramos, Janclei MendesBRA-48.43.0 pts · #57
- 2Ornelas, Joao Pedro QueirozBRA-42.82.0 pts · #59
- 3Lopes, Marcos AlcantaraBRA-31.61.5 pts · #55
Biggest upsets
- R2+299 Elo gap
- R7+262 Elo gap
- R5+254 Elo gap