National Championship Aruba 2025
10 players participated in this 9-round tournament, held from 07 Nov 2025 to 16 Nov 2025 in Oranjestad, Aruba. 3 titled players. Top 10 Elo average was 1765, and top seed was Ilya Stetsenko (🇦🇼 ARU, CM, 1946).
Jose Pesqueira (🇦🇼 ARU, CM, 1827) won with 7.0/9, ahead of Ilya Stetsenko (6.5) and Patrick J. de Roo (5.0). Pesqueira broke clear in the final round.
The biggest upset came in round 5: Patrick J. de Roo (1507) beat Hubert Randolf Tromp (1747), a +240-point gap.
- 🥇
- 🥈
- 🥉
How it unfolded
Top 10 · 9 roundsCM Jose Pesqueira led from R6 onwards, the runner-up race stayed tight. Title race converged from 2 co-leaders at R4 to 1 by R6.
CM Jose Pesqueira held the sole lead from R6 through R9 without losing it.
CM Jose Pesqueira drew with CM Ilya Stetsenko (Black).
CM Jose Pesqueira won 3 in a row (R2–R4).
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇦🇼CMPesqueira, Jose | 1827 | * | ½ | ½ | 1 | 1 | ½ | 1 | 1 | 1 | ½ | 7.0 | 26.00 | 34.0 | +34.2 | 1978 |
| 2 | 🇦🇼CMStetsenko, Ilya | 1946 | ½ | * | ½ | ½ | ½ | ½ | 1 | 1 | 1 | 1 | 6.5 | 22.00 | 34.5 | -4.4 | 1915 |
| 3 | 🇦🇼de Roo, Patrick J. | 1507 | ½ | ½ | * | ½ | 0 | 0 | ½ | 1 | 1 | 1 | 5.0 | 16.50 | 36.0 | +140.4 | 1832 |
| 5 | 🇦🇼Chaudron, Frederik Theodoor | 1775 | 0 | ½ | ½ | * | 0 | 1 | ½ | 1 | 1 | — | 4.5 | 16.75 | 36.5 | +8.4 | 1808 |
| 4 | 🇦🇼Dirks, Ayden | 1764 | 0 | ½ | 1 | 1 | * | ½ | 0 | 0 | ½ | 1 | 4.5 | 16.25 | 36.5 | +0.8 | 1765 |
| 6 | 🇦🇼Franken, Angelo | 1806 | ½ | ½ | 1 | 0 | ½ | * | 0 | 1 | ½ | — | 4.0 | 18.00 | 37.0 | -8.6 | 1762 |
| 7 | 🇦🇼CMCroes, Octavio | 1845 | 0 | 0 | ½ | ½ | 1 | 1 | * | 1 | 0 | — | 4.0 | 16.25 | 37.0 | -17.6 | 1757 |
| 8 | 🇦🇼Vergara Rivera, Juan Sebastiaan | 1724 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | * | 1 | 1 | 3.0 | 7.00 | 38.0 | -38.4 | 1644 |
| 9 | 🇦🇼Viafara, Hernan | 1705 | 0 | 0 | 0 | 0 | ½ | ½ | 1 | 0 | * | — | 2.0 | 8.25 | 39.0 | -25.0 | 1581 |
| 10 | 🇦🇼Tromp, Hubert Randolf | 1747 | ½ | 0 | 0 | — | 0 | — | — | 0 | — | * | 0.5 | 3.50 | 40.5 | -38.8 | 1387 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1de Roo, Patrick J.ARU+140.45.0 pts · #3
- 2Pesqueira, JoseCMARU+34.27.0 pts · #1
- 3Chaudron, Frederik TheodoorARU+8.44.5 pts · #5
- 1Tromp, Hubert RandolfARU-38.80.5 pts · #10
- 2Vergara Rivera, Juan SebastiaanARU-38.43.0 pts · #8
- 3Viafara, HernanARU-25.02.0 pts · #9
- R5+240 Elo gap
- R8+217 Elo gap
- R6+198 Elo gap