North American School Chess Championship Tijuana-Mexico 2025. U09 Abs
Open SwissStandard
8 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 392, and top seed was David Alfredo Sahagun Diaz (🇲🇽 MEX, 1608).
Duc Khai Le (🇨🇦 CAN, 1525) won with 7.0/9, ahead of David Alfredo Sahagun Diaz (6.0). Le broke clear in the final round.
Location
🇲🇽B C, Tijuana, Mexico
Dates
31 Oct 2025 → 04 Nov 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 9 rounds
Federations · 2 represented
🇲🇽Mexico×2
🇨🇦Canada×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 9 roundsDuc Khai Le led from R4; +1.0-point edge over the runner-up.
Co-leaders
1
1
3
1
1
2
2
2
1
R4 · LEADER CHANGE01 Nov
Duc Khai Le takes the sole lead (3.0/4).
R9 · HEAD-TO-HEAD · WINNER VS 2ND
Duc Khai Le beat David Alfredo Sahagun Diaz (White).
WIN STREAKS · 2 top finishers
Duc Khai Le 7 wins (R2–R9)David Alfredo Sahagun Diaz 6 wins (R1–R8)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Duc Khai Le | * | 1 | 1 | 1 |
| 2David Alfredo Sahagun Diaz | 0 | * | 1 | 1 |
| 3FIDE 29635497 | 0 | 0 | * | 1 |
| 4FIDE 550012371 | 0 | 0 | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Le, Duc Khai | 1525 | CAN | F | +8B | +5N | +7B | +3N | F | +6B | +4N | +2B | 7.0 | 19.0 | 19.0 | 19.00 | 2443 | +26.4 |
| 2 | Sahagun Diaz, David Alfredo | 1608 | MEX | +6B | +4N | F | F | +8N | +5B | +7N | +3B | −1N | 6.0 | 20.0 | 20.0 | 13.00 | 725 | -26.4 |
| 3 | FIDE 29635497 | 0 | — | F | +5B | +7N | F | −1B | +6N | +4B | −2N | F | 4.0 | 22.0 | 22.0 | 9.00 | 784 | 0.0 |
| 4 | FIDE 550012371 | 0 | — | F | −2B | F | +8B | −5N | +7B | −3N | −1B | +6N | 3.0 | 23.0 | 23.0 | 3.50 | 784 | 0.0 |
| 5 | Bravo Alvarez, Karel | 0 | MEX | =7B | −3N | −1B | −6N | +4B | −2N | F | +8N | F | 2.5 | 23.5 | 23.5 | 3.75 | 784 | 0.0 |
| 6 | FIDE 550012380 | 0 | — | −2N | F | F | +5B | +7N | −3B | −1N | F | −4B | 2.0 | 24.0 | 24.0 | 4.00 | 784 | 0.0 |
| 7 | FIDE 29645794 | 0 | — | =5N | F | −3B | −1N | −6B | −4N | −2B | F | +8B | 1.5 | 24.5 | 24.5 | 1.25 | 784 | 0.0 |
| 8 | FIDE 550012355 | 0 | — | F | −1N | F | −4N | −2B | F | F | −5B | −7N | 0.0 | 26.0 | 26.0 | 0.00 | 784 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Le, Duc KhaiCAN+26.47.0 pts · #1
- 2FIDE 296354970.04.0 pts · #3
- 3Bravo Alvarez, KarelMEX0.02.5 pts · #6
Top rating losers
- 1Sahagun Diaz, David AlfredoMEX-26.46.0 pts · #7
- 2FIDE 296354970.04.0 pts · #3
- 3Bravo Alvarez, KarelMEX0.02.5 pts · #6