9o Torneio Internacional de Xadrez SESC Caioba Amador Sub 1800
Open SwissStandard
37 players participated in this 7-round tournament, held from 04 Jul 2025 to 06 Jul 2025 in Matinhos PR, Brazil. Top 10 Elo average was 1734, and top seed was Mauro Cezar Pedro Da Costa Filho (🇧🇷 BRA, 1798).
Mauro Cezar Pedro Da Costa Filho (🇧🇷 BRA, 1798) won with 6.5/7, ahead of Ivan Justen Santana (6.0) and Rafael Cabreira Ramos (5.0). Da Costa Filho won solo starting round 4.
The biggest upset came in round 1: Gustavo Kamer (1402) beat Joao Carlos Orguim Da Silva (1784), a +382-point gap.
Location
🇧🇷Matinhos PR, Brazil
Dates
04 Jul 2025 → 06 Jul 2025
Time control
Standard: 60 minutes for game
System
Swiss · 7 rounds
Federations · 1 represented
🇧🇷Brazil×37
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsMauro Cezar Pedro Da Costa Filho led from R4; +0.5-point edge over the runner-up.
Co-leaders
13
5
2
1
1
1
1
R4–R7 · LEAD HELD
Mauro Cezar Pedro Da Costa Filho held the sole lead from R4 through R7 without losing it.
R6 · HEAD-TO-HEAD · WINNER VS 2ND
Mauro Cezar Pedro Da Costa Filho drew with Ivan Justen Santana (White).
WIN STREAKS · 3 top finishers
Mauro Cezar Pedro Da Costa Filho 5 wins (R1–R5)Ivan Justen Santana 3 wins (R3–R5)Vinicius Moraes Avellaneda Sousa 3 wins (R4–R6)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Mauro Cezar Pedro Da Costa Filho | * | ½ | 1 | — |
| 2Ivan Justen Santana | ½ | * | — | — |
| 3Vinicius Moraes Avellaneda Sousa | 0 | — | * | — |
| 4Rafael Cabreira Ramos | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Da Costa Filho, Mauro Cezar Pedro | 1798 | BRA | +11N | +14B | +13N | +5B | +9N | =2B | +4N | 6.5 | 27.0 | 30.5 | 27.50 | 2462 | +52.4 |
| 2 | Santana, Ivan Justen | 0 | BRA | +21B | =24N | +17B | +10N | +16B | =1N | +9N | 6.0 | 24.5 | 27.0 | 22.50 | 1692 | 0.0 |
| 3 | Ramos, Rafael Cabreira | 1651 | BRA | −6N | +35B | +14N | +12B | −15N | +30B | +13B | 5.0 | 21.0 | 22.0 | 14.00 | 1657 | +0.4 |
| 4 | Sousa, Vinicius Moraes Avellaneda | 1749 | BRA | +33B | +23N | −9N | +32B | +24B | +22N | −1B | 5.0 | 21.0 | 22.0 | 11.50 | 1867 | +28.8 |
| 5 | Reis, Oseias Marcelino Dos | 1778 | BRA | F | +18N | =10B | −1N | +21B | +16N | +15B | 4.5 | 24.0 | 24.0 | 15.50 | 1747 | -1.6 |
| 6 | C. Lobo D. O. G. A. F, Emmanuel | 0 | BRA | +3B | +28N | +19N | −9B | =13B | −15N | +24B | 4.5 | 22.0 | 24.0 | 14.75 | 1728 | 0.0 |
| 7 | Bonfim, Rodrigo Rosa | 1735 | BRA | +26B | −10N | +23B | −13N | =12B | +21N | +14B | 4.5 | 21.0 | 23.5 | 14.00 | 1527 | -41.2 |
| 8 | Ribeiro, Giovanna G Da Costa | 0 | BRA | +20N | −15B | =21B | +28N | +25B | −13N | +22B | 4.5 | 19.0 | 21.0 | 12.50 | 1668 | 0.0 |
| 9 | Fukuda, Sussumu Valter | 0 | BRA | F | +32N | +4B | +6N | −1B | +24N | −2B | 4.0 | 26.5 | 26.5 | 14.00 | 1727 | 0.0 |
| 10 | Kamer, Gustavo | 1402 | BRA | +29N | +7B | =5N | −2B | −22N | +28B | =19N | 4.0 | 23.5 | 25.5 | 12.50 | 1849 | +128.0 |
| 11 | Fraga, Sofia Carneiro | 1496 | BRA | −1B | −29B | +31N | +34N | +17B | =14N | =12B | 4.0 | 21.5 | 22.5 | 10.25 | 1650 | +20.4 |
| 12 | Soares, Jefferson Miranda | 0 | BRA | +31N | −13B | +37B | −3N | =7N | +35B | =11N | 4.0 | 20.0 | 20.0 | 7.25 | 1522 | 0.0 |
| 13 | Lima, Ana Beatriz Castro Mendes | 1625 | BRA | F | +12N | −1B | +7B | =6N | +8B | −3N | 3.5 | 29.0 | 29.0 | 15.25 | 1603 | -3.2 |
| 14 | Portes Marques, Leonardo Eugenio | 0 | BRA | +17B | −1N | −3B | +18N | +29N | =11B | −7N | 3.5 | 27.0 | 29.0 | 11.00 | 1675 | 0.0 |
| 15 | Sierpinski, Eleandro | 1689 | BRA | F | +8N | =16B | −24N | +3B | +6B | −5N | 3.5 | 24.5 | 24.5 | 15.75 | 1564 | -20.0 |
| 16 | Dias, Sergio | 0 | BRA | +27N | +25B | =15N | +29B | −2N | −5B | F | 3.5 | 21.0 | 21.0 | 8.75 | 1702 | 0.0 |
| 17 | Carvalho Filho, Jose Roberto Gama | 1743 | BRA | −14N | +31B | −2N | +36B | −11N | +34B | =18N | 3.5 | 20.0 | 20.5 | 5.25 | 1315 | -43.6 |
| 18 | Sfair, Luan Silva | 1521 | BRA | +30N | −5B | −29N | −14B | +27N | +31B | =17B | 3.5 | 18.0 | 20.0 | 8.25 | 1621 | +17.2 |
| 19 | Venter, Paulo Regis | 1708 | BRA | F | +37N | −6B | −21N | +26B | +25N | =10B | 3.5 | 16.5 | 16.5 | 7.00 | 1590 | -11.2 |
| 20 | Bockor, Luana Ieger | 1639 | BRA | −8B | +33N | =26B | −25N | −28B | +27N | +37B | 3.5 | 15.0 | 15.0 | 4.75 | 1556 | -18.0 |
| 21 | Cunha, Paola De Oliveira | 1578 | BRA | −2N | +30B | =8N | +19B | −5N | −7B | =28N | 3.0 | 25.0 | 27.0 | 8.75 | 1643 | +12.0 |
| 22 | Rosa, Jefferson Luiz | 1636 | BRA | F | +36N | −24B | +26N | +10B | −4B | −8N | 3.0 | 19.0 | 19.0 | 7.00 | 1471 | -12.8 |
| 23 | Palozi, Leonardo Antunes | 1500 | BRA | +34N | −4B | −7N | −30B | −31N | +33B | +35N | 3.0 | 15.5 | 16.5 | 3.00 | 942 | -16.0 |
| 24 | Ramos, Fernanda Cabreira | 1637 | BRA | F | =2B | +22N | +15B | −4N | −9B | −6N | 2.5 | 26.0 | 26.0 | 9.50 | 1816 | +28.8 |
| 25 | Ribeiro,Ricardo de Biasi | 1531 | BRA | F | −16N | =28B | +20B | −8N | −19B | +32N | 2.5 | 19.0 | 19.0 | 6.50 | 1748 | +46.0 |
| 26 | Ribeiro, Maicon Brain Pereira | 0 | BRA | −7N | +27B | =20N | −22B | −19N | F | +33B | 2.5 | 18.0 | 18.0 | 5.25 | 1500 | 0.0 |
| 27 | Guimaraes, Felipe Pavanato | 1512 | BRA | −16B | −26N | =36B | +33N | −18B | −20B | +34N | 2.5 | 15.0 | 15.5 | 2.25 | 780 | -34.4 |
| 28 | Bergamo, Victor Hugo Moura | 1700 | BRA | F | −6B | =25N | −8B | +20N | −10N | =21B | 2.0 | 22.0 | 22.0 | 6.25 | 1538 | -16.2 |
| 29 | Da Silva, Joao Carlos Orguim | 1784 | BRA | −10B | +11N | +18B | −16N | −14B | F | F | 2.0 | 20.5 | 22.5 | 7.50 | 1598 | -11.4 |
| 30 | Lopes, Rodrigo Dos Santos | 0 | BRA | −18B | −21N | F | +23N | +32B | −3N | F | 2.0 | 18.5 | 18.5 | 5.00 | 1491 | 0.0 |
| 31 | Hendriw, Herick | 0 | BRA | −12B | −17N | −11B | +37N | +23B | −18N | F | 2.0 | 18.5 | 18.5 | 3.00 | 1473 | 0.0 |
| 32 | Santana, Expedito | 1559 | BRA | +35N | −9B | +34B | −4N | −30N | F | −25B | 2.0 | 16.5 | 17.5 | 2.00 | 840 | -16.2 |
| 33 | De Souza, Jose Luiz Alves | 0 | BRA | −4N | −20B | +35N | −27B | −34B | −23N | −26N | 1.0 | 17.5 | 18.5 | 1.00 | 804 | 0.0 |
| 34 | Yau, Song | 0 | BRA | −23B | F | −32N | −11B | +33N | −17N | −27B | 1.0 | 16.0 | 16.0 | 1.00 | 766 | 0.0 |
| 35 | Vailati, Julia | 0 | BRA | −32B | −3N | −33B | F | +36N | −12N | −23B | 1.0 | 15.5 | 15.5 | 0.50 | 772 | 0.0 |
| 36 | Oleskovicz, Caio Vinicius | 0 | BRA | F | −22B | =27N | −17N | −35B | F | F | 0.5 | 12.0 | 12.0 | 1.25 | 1363 | 0.0 |
| 37 | Martinho, Everson Da Costa | 1466 | BRA | F | −19B | −12N | −31B | F | F | −20N | 0.0 | 15.5 | 15.5 | 0.00 | 874 | -18.8 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Kamer, GustavoBRA+128.04.0 pts · #6
- 2Da Costa Filho, Mauro Cezar PedroBRA+52.46.5 pts · #3
- 3Ribeiro,Ricardo de BiasiBRA+46.02.5 pts · #12
Top rating losers
- 1Carvalho Filho, Jose Roberto GamaBRA-43.63.5 pts · #29
- 2Bonfim, Rodrigo RosaBRA-41.24.5 pts · #18
- 3Guimaraes, Felipe PavanatoBRA-34.42.5 pts · #31
Biggest upsets
- R1+382 Elo gap
- R2+333 Elo gap
- R6+298 Elo gap