III Campeonato Tocantinense de Xadrez 2026 U20
7 players participated in this 5-round tournament, held from 28 Mar 2026 to 29 Mar 2026 in Palmas TO, Brazil. Top 10 Elo average was 938, and top seed was Samuel Oliveira Borges Silveira (🇧🇷 BRA, 1770).
Willian Alves Martins (🇧🇷 BRA, 1730) won with 4.0/5, ahead of Benjamin Leite Bibikow (3.5) and Elisa Queiroz Costa (2.5). Martins won solo starting round 2.
The biggest upset came in round 4: Elisa Queiroz Costa (1481) beat Yanni Queiroz Costa (1586), a +105-point gap.
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How it unfolded
Top 6 · 5 roundsWillian Alves Martins led from R2; +0.5-point edge over the runner-up.
Willian Alves Martins held the sole lead from R2 through R5 without losing it.
Willian Alves Martins lost to Benjamin Leite Bibikow (Black).
Willian Alves Martins won 3 in a row (R1–R3).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Willian Alves Martins | * | 0 | 1 | 1 |
| 2Benjamin Leite Bibikow | 1 | * | ½ | 0 |
| 3Elisa Queiroz Costa | 0 | ½ | * | 1 |
| 4Yanni Queiroz Costa | 0 | 1 | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Martins, Willian Alves | 1730 | BRA | +5B | +4N | +6B | −2N | +3B | 4.0 | 9.5 | 11.0 | 7.50 | 2413 | +42.4 |
| 2 | Bibikow, Benjamin Leite | 0 | BRA | −4B | +5N | =3N | +1B | +7B | 3.5 | 10.0 | 10.0 | 6.75 | 1599 | 0.0 |
| 3 | Costa, Elisa Queiroz | 1481 | BRA | +7B | −6N | =2B | +4N | −1N | 2.5 | 11.0 | 11.0 | 3.75 | 1571 | +11.6 |
| 4 | Costa, Yanni Queiroz | 1586 | BRA | +2N | −1B | +7N | −3B | F | 2.0 | 10.0 | 10.0 | 3.50 | 806 | -38.0 |
| 5 | Pereira Alves, Julia Whanmylla | 0 | BRA | −1N | −2B | F | +7N | =6B | 1.5 | 9.0 | 9.0 | 0.75 | 1557 | 0.0 |
| 6 | Silveira, Samuel Oliveira Borges | 1770 | BRA | F | +3B | −1N | F | =5N | 1.5 | 8.0 | 8.0 | 3.25 | 1606 | -16.0 |
| 7 | Paiva, Alvaro Jose Rocha | 0 | BRA | −3N | F | −4B | −5B | −2N | 0.0 | 9.5 | 9.5 | 0.00 | 734 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Martins, Willian AlvesBRA+42.44.0 pts · #1
- 2Costa, Elisa QueirozBRA+11.62.5 pts · #4
- 3Paiva, Alvaro Jose RochaBRA0.00.0 pts · #6
- 1Costa, Yanni QueirozBRA-38.02.0 pts · #7
- 2Silveira, Samuel Oliveira BorgesBRA-16.01.5 pts · #3
- 3Paiva, Alvaro Jose RochaBRA0.00.0 pts · #6
- R4+105 Elo gap