North American School Chess Championship Tijuana-Mexico 2025. U13 Abs
13 players participated in this 9-round tournament, held from 31 Oct 2025 to 04 Nov 2025 in B C, Tijuana, Mexico. 2 federations represented. Top 10 Elo average was 1712, and top seed was Pablo Elliott De Alba Boudreau (🇲🇽 MEX, 1828).
Gilberto Najera Herrera (🇲🇽 MEX, 1626) won with 7.0/9, ahead of Mateo Ruiz Gastelum (6.5) and Pablo Elliott De Alba Boudreau (6.5). Najera Herrera won solo starting round 8.
The biggest upset came in round 1: Santiago Ortiz Padilla (1513) beat Armando Zayd Gonzalez Cadena (1808), a +295-point gap.
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How it unfolded
Top 6 · 9 roundsGilberto Najera Herrera led from R4; +0.5-point edge over the runner-up.
Gilberto Najera Herrera held the sole lead from R4 through R9 without losing it.
Gilberto Najera Herrera drew with Mateo Ruiz Gastelum (Black).
Gilberto Najera Herrera 4 wins (R2–R5)Pablo Elliott De Alba Boudreau 3 wins (R7–R9)
Key matchups · top 4
Head-to-head between the four finishersGrille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Najera Herrera, Gilberto | 1626 | MEX | =3B | +9N | +5B | +4N | +6B | =2N | −7N | +8B | +11B | 7.0 | 38.5 | 40.5 | 30.00 | 1925 | +125.2 |
| 2 | Ruiz Gastelum, Mateo | 1806 | MEX | +10B | +5N | =4B | =6N | =3B | =1B | +11N | =7N | +9B | 6.5 | 37.0 | 39.0 | 25.25 | 1865 | +30.0 |
| 3 | De Alba Boudreau, Pablo Elliott | 1828 | MEX | =1N | +8B | −6N | +11B | =2N | =5B | +10N | +12B | +7B | 6.5 | 34.5 | 36.5 | 23.00 | 1793 | -8.4 |
| 4 | Martinez Nestor, Ian Marco | 1752 | MEX | +12B | +13N | =2N | −1B | −11N | =8N | =9B | +5B | +6N | 5.5 | 33.5 | 34.0 | 18.25 | 1684 | -18.0 |
| 5 | Ortiz Padilla, Santiago | 1513 | MEX | +7B | −2B | −1N | +13N | +9B | =3N | +6B | −4N | F | 4.5 | 37.5 | 37.5 | 15.25 | 1749 | +82.0 |
| 6 | Galaviz Medina, Ades Antares | 1745 | MEX | F | +12N | +3B | =2B | −1N | +11B | −5N | +10B | −4B | 4.5 | 36.0 | 36.0 | 15.75 | 1694 | -17.2 |
| 7 | Gonzalez Cadena, Armando Zayd | 1808 | MEX | −5N | −10B | =8N | F | +13B | +12N | +1B | =2B | −3N | 4.0 | 33.0 | 33.0 | 14.75 | 1529 | -72.0 |
| 8 | Perez Rodriguez, Edred Marek | 0 | MEX | =9B | −3N | =7B | +10N | =12N | =4B | F | −1N | +13B | 4.0 | 30.5 | 30.5 | 9.75 | 1662 | +40.4 |
| 9 | Szeto, Jordan | 1691 | CAN | =8N | −1B | +10N | −12B | −5N | F | =4N | +13B | −2N | 3.0 | 32.0 | 32.0 | 7.25 | 1512 | -48.0 |
| 10 | Rascon Peralta, Bolivar Ernesto | 1618 | MEX | −2N | +7N | −9B | −8B | F | +13N | −3B | −6N | F | 2.0 | 31.0 | 31.0 | 4.50 | 1535 | -19.2 |
| 11 | Espinosa Guzman, Alfonso Naim | 1730 | MEX | F | F | +13B | −3N | +4B | −6N | −2B | F | −1N | 2.0 | 30.5 | 30.5 | 6.00 | 1509 | -54.4 |
| 12 | Garcia Guzman, Luis Roberto | 0 | MEX | −4N | −6B | F | +9N | =8B | −7B | =13N | −3N | F | 2.0 | 30.0 | 30.0 | 5.25 | 1522 | 0.0 |
| 13 | FIDE 550009559 | 0 | — | F | −4B | −11N | −5B | −7N | −10B | =12B | −9N | −8N | 0.5 | 27.0 | 27.0 | 1.00 | 883 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Najera Herrera, GilbertoMEX+125.27.0 pts · #2
- 2Ortiz Padilla, SantiagoMEX+82.04.5 pts · #5
- 3Perez Rodriguez, Edred MarekMEX+40.44.0 pts · #7
- 1Gonzalez Cadena, Armando ZaydMEX-72.04.0 pts · #9
- 2Espinosa Guzman, Alfonso NaimMEX-54.42.0 pts · #10
- 3Szeto, JordanCAN-48.03.0 pts · #8
- R1+295 Elo gap
- R7+232 Elo gap
- R2+190 Elo gap