I IRT STD U2400 CX Maringa 2026
Open SwissStandard
41 players participated in this 7-round tournament, held from 14 Feb 2026 to 17 Feb 2026 in Maringa PR, Brazil. 1 titled players. Top 10 Elo average was 1862, and top seed was Wanderlei Lukachewski Junior (🇧🇷 BRA, 2036).
Kaiser Luiz Mafra (🇧🇷 BRA, CM, 2006) won with 6.0/7, ahead of Rafael Tuma Soares (6.0) and Wanderlei Lukachewski Junior (6.0). Mafra won on tie-break after catching the field in the final round.
The biggest upset came in round 6: Karina Maria Souza Balbino (1514) beat Pedro Augusto Dos Santos (1745), a +231-point gap.
Location
🇧🇷Maringa PR, Brazil
Dates
14 Feb 2026 → 17 Feb 2026
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 7 rounds
Titled players · 1
CM×1
Federations · 1 represented
🇧🇷Brazil×36
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsTight race until R4; 3 players tied at 6.0/7, decided on Buchholz.
Co-leaders
18
10
4
1
3
2
3
R4–R7 · LEAD HELD
Rafael Tuma Soares held the sole lead from R4 through R7 without losing it.
R7 · TIEBREAK CLUSTER
3 players finish on 6.0/7. Mafra takes the title on Buchholz Cut1 (29.5).
R5 · HEAD-TO-HEAD · WINNER VS 2ND
Rafael Tuma Soares drew with CM Kaiser Luiz Mafra (Black).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Rafael Tuma Soares | * | ½ | ½ | — |
| 2CMKaiser Luiz Mafra | ½ | * | — | ½ |
| 3Wanderlei Lukachewski Junior | ½ | — | * | — |
| 4Samuel Ramazzotte Monteiro | — | ½ | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Mafra, Kaiser LuizCM | 2006 | BRA | +20B | +5N | =4B | +12N | =2B | +7N | +8B | 6.0 | 29.5 | 33.0 | 27.50 | 2093 | +13.0 |
| 2 | Soares, Rafael Tuma | 1950 | BRA | +27N | +13B | +21N | +6B | =1N | +8B | =3B | 6.0 | 29.0 | 32.0 | 26.00 | 2131 | +58.4 |
| 3 | Lukachewski Junior, Wanderlei | 2036 | BRA | +11N | +9B | +12N | =8B | +6N | +13B | =2N | 6.0 | 28.5 | 32.5 | 27.25 | 2102 | +9.6 |
| 4 | Monteiro, Samuel Ramazzotte | 1813 | BRA | +30N | +16B | =1N | +21B | −8N | +10B | =5N | 5.0 | 27.5 | 30.5 | 20.50 | 1908 | +30.0 |
| 5 | Monteiro, Helen Ramazzotte | 1731 | BRA | +35N | −1B | =14N | +11B | +31N | +15B | =4B | 5.0 | 26.5 | 28.5 | 18.00 | 1886 | +20.6 |
| 6 | Ramazzotte, Maicon Zilli | 1822 | BRA | +37N | +25B | +22N | −2N | −3B | +14B | +12N | 5.0 | 26.5 | 27.5 | 15.50 | 1883 | +8.6 |
| 7 | Seron, Pedro Montenegro | 1678 | BRA | +32N | −12B | +33N | +14B | +9N | −1B | +13N | 5.0 | 25.5 | 28.0 | 18.00 | 1816 | +26.8 |
| 8 | Ramazzotte, Esther Zilli | 1885 | BRA | +28B | +10N | +24B | =3N | +4B | −2N | −1N | 4.5 | 30.5 | 33.5 | 18.50 | 1912 | +16.8 |
| 9 | Viana, Matheus Pimentel Dom Bosco | 1728 | BRA | +19B | −3N | +28B | +24N | −7B | =18N | +20B | 4.5 | 24.5 | 27.5 | 14.75 | 1733 | +3.6 |
| 10 | Vieira, Luana Saddi | 1722 | BRA | +29N | −8B | +37N | +22B | =15N | −4N | +19B | 4.5 | 23.5 | 24.5 | 13.00 | 1682 | -4.8 |
| 11 | Ogawa, Gustavo Kenji | 1591 | BRA | −3B | +19N | =26B | −5N | +34B | +36N | +18B | 4.5 | 23.0 | 24.5 | 12.00 | 1700 | +12.8 |
| 12 | Simoncini, Luana Felipe | 1821 | BRA | +17B | +7N | −3B | −1B | +27N | +24N | −6B | 4.0 | 29.0 | 32.0 | 15.00 | 1778 | -11.6 |
| 13 | Moreira, Guilherme Valerio | 1706 | BRA | +23B | −2N | +17B | +36N | +16B | −3N | −7B | 4.0 | 28.5 | 30.0 | 13.00 | 1625 | -19.6 |
| 14 | Pavao, Enzo Passos | 0 | BRA | =18B | +20N | =5B | −7N | +25B | −6N | +24B | 4.0 | 25.0 | 28.0 | 13.75 | 1707 | 0.0 |
| 15 | Ramazzotte, Alexandre Franco | 1786 | BRA | +41B | −24N | +18B | +25N | =10B | −5N | =16B | 4.0 | 23.0 | 23.0 | 10.75 | 1688 | -16.0 |
| 16 | Ogawa, Vinicius Hiroshi | 1609 | BRA | +26B | −4N | +34B | =18N | −13N | +31B | =15N | 4.0 | 22.5 | 24.5 | 11.75 | 1638 | +6.0 |
| 17 | Barriquello Calleros, Carlos A | 0 | BRA | −12N | +29B | −13N | +39B | −18B | +32N | +26B | 4.0 | 20.5 | 21.5 | 10.00 | 961 | 0.0 |
| 18 | Rocha, Eduardo Samuel | 1753 | BRA | =14N | +40B | −15N | =16B | +17N | =9B | −11N | 3.5 | 25.0 | 25.0 | 10.25 | 1486 | -55.2 |
| 19 | Fabre, Lucas Mendes | 0 | BRA | −9N | −11B | +30N | +33B | =21N | +22B | −10N | 3.5 | 23.5 | 26.0 | 10.75 | 1527 | 0.0 |
| 20 | Balbino, Karina Maria Souza | 1514 | BRA | −1N | −14B | +35N | =29B | +37N | +21B | −9N | 3.5 | 23.0 | 24.0 | 8.00 | 1671 | +19.2 |
| 21 | Dos Santos, Pedro Augusto | 1745 | BRA | +38B | +36N | −2B | −4N | =19B | −20N | +28B | 3.5 | 22.5 | 23.5 | 7.25 | 1481 | -52.0 |
| 22 | Cavalcante, Davi Miguel De Souza | 1592 | BRA | +34N | +31B | −6B | −10N | =36B | −19N | +33B | 3.5 | 20.5 | 22.0 | 8.25 | 1553 | -6.8 |
| 23 | Fernandes, Pablo Nishimura C | 0 | BRA | −13N | −27B | +38B | +28N | −24B | =34N | +35B | 3.5 | 17.0 | 18.0 | 7.00 | 1370 | 0.0 |
| 24 | Carvalho Filho, Jose Roberto Gama | 1655 | BRA | +33N | +15B | −8N | −9B | +23N | −12B | −14N | 3.0 | 24.5 | 27.0 | 10.00 | 1612 | -8.4 |
| 25 | Godoy, Pedro Augusto Salamanca | 1656 | BRA | +39B | −6N | +32B | −15B | −14N | =26N | =29B | 3.0 | 22.0 | 23.0 | 7.00 | 1004 | -24.4 |
| 26 | Gonides, Fernando Orlando Santana | 0 | BRA | −16N | +30B | =11N | −31B | +29N | =25B | −17N | 3.0 | 21.5 | 24.5 | 9.75 | 1394 | 0.0 |
| 27 | Ramazzotte, Rafaela Graziele Zill | 1470 | BRA | −2B | +23N | −36B | +32N | −12B | =33N | =34B | 3.0 | 21.0 | 22.5 | 8.75 | 1047 | -7.6 |
| 28 | Da Silva, Rafaela Sofia Ramos | 1419 | BRA | −8N | +35B | −9N | −23B | +39N | +30B | −21N | 3.0 | 21.0 | 22.0 | 6.00 | 964 | -14.0 |
| 29 | Ogawa, Allex Itar | 0 | BRA | −10B | −17N | +41B | =20N | −26B | +38N | =25N | 3.0 | 19.0 | 19.0 | 4.25 | 1506 | 0.0 |
| 30 | FIDE 44748205 | 0 | — | −4B | −26N | −19B | +40N | +35B | −28N | +39B | 3.0 | 17.5 | 17.5 | 3.00 | 817 | 0.0 |
| 31 | Shirabe, Gustavo Tsuyoshi Hasegaw | 1489 | BRA | F | −22N | +40B | +26N | −5B | −16N | +36B | 3.0 | 17.0 | 17.0 | 4.50 | 844 | -36.0 |
| 32 | Davanco, Amanda Gabrielli Silva | 0 | BRA | −7B | +41N | −25N | −27B | +38N | −17B | +40N | 3.0 | 16.0 | 16.0 | 1.00 | 802 | 0.0 |
| 33 | Yau, Song | 0 | BRA | −24B | +38N | −7B | −19N | +40N | =27B | −22N | 2.5 | 19.0 | 19.0 | 2.50 | 1277 | 0.0 |
| 34 | Nakahati, Laura Yumi | 0 | BRA | −22B | F | −16N | +37B | −11N | =23B | =27N | 2.0 | 19.5 | 19.5 | 4.25 | 1244 | 0.0 |
| 35 | FIDE 538040468 | 0 | — | −5B | −28N | −20B | +41N | −30N | +37B | −23N | 2.0 | 19.0 | 19.0 | 1.00 | 755 | 0.0 |
| 36 | Pereira, Murilo Alves | 0 | BRA | F | −21B | +27N | −13B | =22N | −11B | −31N | 1.5 | 21.5 | 21.5 | 4.75 | 1406 | 0.0 |
| 37 | FIDE 538040441 | 0 | — | −6B | +39N | −10B | −34N | −20B | −35N | F | 1.0 | 18.0 | 18.0 | 1.00 | 886 | 0.0 |
| 38 | FIDE 44748213 | 0 | — | −21N | −33B | −23N | F | −32B | −29B | +41N | 1.0 | 15.5 | 15.5 | 0.00 | 945 | 0.0 |
| 39 | Fernandes, Pietro Nishimura Caste | 0 | BRA | −25N | −37B | F | −17N | −28B | +41B | −30N | 1.0 | 14.0 | 14.0 | 0.00 | 738 | 0.0 |
| 40 | Shirabe, Felipe Toshiyuki Hasegaw | 0 | BRA | F | −18N | −31N | −30B | −33B | F | −32B | 0.0 | 15.0 | 15.0 | 0.00 | 821 | 0.0 |
| 41 | FIDE 538040450 | 0 | — | −15N | −32B | −29N | −35B | F | −39N | −38B | 0.0 | 14.0 | 14.0 | 0.00 | 986 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Soares, Rafael TumaBRA+58.46.0 pts · #1
- 2Monteiro, Samuel RamazzotteBRA+30.05.0 pts · #5
- 3Seron, Pedro MontenegroBRA+26.85.0 pts · #13
Top rating losers
- 1Rocha, Eduardo SamuelBRA-55.23.5 pts · #24
- 2Dos Santos, Pedro AugustoBRA-52.03.5 pts · #20
- 3Shirabe, Gustavo Tsuyoshi HasegawBRA-36.03.0 pts · #41
Biggest upsets
- R6+231 Elo gap
- R7+162 Elo gap
- R2+131 Elo gap