Campeonato Juvenil de Euskadi 2026 - Zonal de Bizkaia
19 players participated in this 5-round tournament, held from 22 Dec 2025 to 03 Jan 2026 in Bilbao (Vizcaya), Spain. Top 10 Elo average was 1791, and top seed was Eder Bombin Martinez (🇪🇸 ESP, 2052).
Eder Bombin Martinez (🇪🇸 ESP, 2052) won with 5.0/5, ahead of Aitor De la Sierra Mendibil (4.0) and Leire Menoyo Garcia (3.0). Bombin Martinez won solo starting round 3.
The biggest upset came in round 4: Unax Sierra Gonzalez (1500) beat Igor Bernal Arnaldes (1824), a +324-point gap.
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How it unfolded
Top 6 · 5 roundsEder Bombin Martinez led from R3; +1.0-point edge over the runner-up.
Eder Bombin Martinez never relinquished the lead after R3; final gap +1.0 over the runner-up.
Eder Bombin Martinez beat Aitor De la Sierra Mendibil (White).
Eder Bombin Martinez 5 wins (R1–R5)Unax Sierra Gonzalez 3 wins (R2–R4)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Eder Bombin Martinez | * | 1 | — | 1 |
| 2Aitor De la Sierra Mendibil | 0 | * | — | — |
| 3Unax Sierra Gonzalez | — | — | * | 0 |
| 4Leire Menoyo Garcia | 0 | — | 1 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Bombin Martinez, Eder | 2052 | ESP | +9B | +8N | +2B | +3N | +5B | 5.0 | 12.5 | 14.5 | 14.50 | 2609 | +50.8 |
| 2 | De la Sierra Mendibil, Aitor | 1808 | ESP | +12N | +18B | −1N | +13B | +4N | 4.0 | 10.5 | 10.5 | 5.50 | 1886 | +16.8 |
| 3 | Menoyo Garcia, Leire | 1906 | ESP | F | +4N | +5B | −1B | +6N | 3.0 | 14.0 | 15.0 | 9.00 | 1997 | +35.6 |
| 4 | Iturgaiz Lopez, Unai | 1657 | ESP | +16N | −3B | +10B | +7N | −2B | 3.0 | 11.5 | 11.5 | 4.50 | 1737 | +14.0 |
| 5 | Zubizarreta Landera, Denis | 1975 | ESP | +14N | +15B | −3N | +11B | −1N | 3.0 | 10.5 | 11.5 | 3.50 | 1820 | -34.8 |
| 6 | Sierra Gonzalez, Unax | 1500 | ESP | −7N | +14B | +15N | +8B | −3B | 3.0 | 9.5 | 10.5 | 4.50 | 1810 | +69.6 |
| 7 | Grande Gonzalez, Julen | 1823 | ESP | +6B | +11N | F | −4B | +13N | 3.0 | 8.5 | 8.5 | 5.50 | 1782 | -3.6 |
| 8 | Bernal Arnaldes, Igor | 1824 | ESP | +10N | −1B | =12N | −6N | +14B | 2.5 | 11.0 | 12.0 | 3.25 | 1627 | -40.0 |
| 9 | Fernandez Menendez, Markel | 1596 | ESP | −1N | F | +17B | +19N | F | 2.0 | 6.5 | 6.5 | 0.00 | 1195 | -3.2 |
| 10 | Vegas Garcia, Markel | 1520 | ESP | −8B | F | −4N | +15B | =11N | 1.5 | 9.0 | 10.0 | 1.75 | 1605 | +19.2 |
| 11 | Guerrero Barrios, Unai | 1567 | ESP | +19N | −7B | F | −5N | =10B | 1.5 | 7.5 | 7.5 | 0.75 | 1492 | -18.4 |
| 12 | Basabe Puente, Luis | 1535 | ESP | −2B | +17N | =8B | F | F | 1.5 | 6.5 | 6.5 | 1.25 | 1609 | +6.0 |
| 13 | Bilbao-Goyoaga Gutierrez, Ander | 1547 | ESP | F | F | +19B | −2N | −7B | 1.0 | 10.0 | 10.0 | 0.00 | 1009 | -14.4 |
| 14 | Echeberria Juanes, Gorka | 1572 | ESP | −5B | −6N | +16B | F | −8N | 1.0 | 8.5 | 8.5 | 0.00 | 961 | -32.4 |
| 15 | De Escalza Ugarte, Gorka | 1701 | ESP | +17B | −5N | −6B | −10N | F | 1.0 | 7.5 | 7.5 | 0.00 | 875 | -65.2 |
| 16 | FIDE 553003020 | 0 | — | −4B | F | −14N | F | F | 0.0 | 6.0 | 6.0 | 0.00 | 815 | 0.0 |
| 17 | Belloso Saenz de Buruaga, Unai | 0 | ESP | −15N | −12B | −9N | F | F | 0.0 | 5.5 | 5.5 | 0.00 | 810 | 0.0 |
| 18 | FIDE 553019598 | 0 | — | F | −2N | F | F | F | 0.0 | 5.5 | 5.5 | 0.00 | 1012 | 0.0 |
| 19 | FIDE 535035331 | 0 | — | −11B | F | −13N | −9B | F | 0.0 | 4.5 | 4.5 | 0.00 | 781 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Sierra Gonzalez, UnaxESP+69.63.0 pts · #2
- 2Bombin Martinez, EderESP+50.85.0 pts · #1
- 3Menoyo Garcia, LeireESP+35.63.0 pts · #3
- 1De Escalza Ugarte, GorkaESP-65.21.0 pts · #12
- 2Bernal Arnaldes, IgorESP-40.02.5 pts · #7
- 3Zubizarreta Landera, DenisESP-34.83.0 pts · #4
- R4+324 Elo gap
- R3+201 Elo gap
- R4+181 Elo gap