I Campeonato Nacional e Internacional de Ajedrez Monterrey 2025 - Sub 09
Open SwissStandard
14 players participated in this 6-round tournament, held from 16 Oct 2025 to 19 Oct 2025 in N L, Monterrey, Mexico. Top 10 Elo average was 464, and top seed was David Alfredo Sahagun Diaz (🇲🇽 MEX, 1608).
David Alfredo Sahagun Diaz (🇲🇽 MEX, 1608) won with 5.5/6, ahead of Carlos Quintanilla Corona (5.0) and Carlos Derek Matuz Espinoza (4.0). Sahagun Diaz clinched sole first place in the final round.
Location
🇲🇽N L, Monterrey, Mexico
Dates
16 Oct 2025 → 19 Oct 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 6 rounds
Federations · 1 represented
🇲🇽Mexico×7
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsDavid Alfredo Sahagun Diaz led from R6; +0.5-point edge over the runner-up.
Co-leaders
10
4
2
1
1
1
R6 · LEADER CHANGE19 Oct
David Alfredo Sahagun Diaz takes the sole lead (5.5/6).
R6 · HEAD-TO-HEAD · WINNER VS 2ND
David Alfredo Sahagun Diaz beat Carlos Quintanilla Corona (White).
WIN STREAKS · 2 top finishers
David Alfredo Sahagun Diaz 3 wins (R4–R6)Carlos Quintanilla Corona 5 wins (R1–R5)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1David Alfredo Sahagun Diaz | * | 1 | 1 | — |
| 2Carlos Quintanilla Corona | 0 | * | 1 | — |
| 3Carlos Derek Matuz Espinoza | 0 | 0 | * | — |
| 4FIDE 29630835 | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Sahagun Diaz, David Alfredo | 1608 | MEX | +11N | +7B | =4N | +3B | +5N | +2B | 5.5 | 19.5 | 21.0 | 19.25 | 1689 | +4.8 |
| 2 | Quintanilla Corona, Carlos | 0 | MEX | +?B | +3B | +9N | +5B | +4N | −1N | 5.0 | 19.5 | 19.5 | 14.00 | 1565 | 0.0 |
| 3 | Matuz Espinoza, Carlos Derek | 0 | MEX | +?B | −2N | +6B | −1N | +?B | +?N | 4.0 | 14.0 | 14.0 | 3.50 | 843 | 0.0 |
| 4 | Chapa Charles, Alexis Daniel | 1471 | MEX | +13B | +6N | =1B | +10N | −2B | −8N | 3.5 | 20.0 | 21.0 | 9.75 | 1643 | +10.8 |
| 5 | Salazar Amaro, Pedro Miguel | 1556 | MEX | +12B | +14N | +8B | −2N | −1B | =9N | 3.5 | 18.0 | 18.5 | 6.50 | 843 | -15.6 |
| 6 | FIDE 29687780 | 0 | — | +?N | −4B | −3N | +11B | +14B | =7N | 3.5 | 13.0 | 13.0 | 3.75 | 632 | 0.0 |
| 7 | Gastelum Valencia, Mario | 0 | MEX | +?B | −1N | +?B | −?N | +10B | =6B | 3.5 | 11.5 | 11.5 | 4.25 | 843 | 0.0 |
| 8 | FIDE 29630835 | 0 | — | F | +?B | −5N | +?B | =?N | +4B | 3.5 | 7.0 | 7.0 | 3.50 | 1496 | 0.0 |
| 9 | FIDE 29694060 | 0 | — | +?B | F | −2B | +14N | =?N | =5B | 3.0 | 9.0 | 9.0 | 2.25 | 1560 | 0.0 |
| 10 | FIDE 29635756 | 0 | — | −?N | +12B | +?N | −4B | −7N | =?B | 2.5 | 8.0 | 8.0 | 1.00 | 632 | 0.0 |
| 11 | FIDE 29657571 | 0 | — | −1B | +?N | −?B | −6N | =12B | −?N | 1.5 | 10.0 | 10.0 | 0.50 | 843 | 0.0 |
| 12 | FIDE 550000853 | 0 | — | −5N | −10N | −?B | =13B | =11N | −?N | 1.0 | 8.5 | 8.5 | 1.25 | 760 | 0.0 |
| 13 | Aguirre Medina, Alejandro | 0 | MEX | −4N | −?N | −?B | =12N | =?B | −?N | 1.0 | 4.5 | 4.5 | 0.50 | 632 | 0.0 |
| 14 | FIDE 29687705 | 0 | — | F | −5B | =?N | −9B | −6N | −?N | 0.5 | 10.0 | 10.0 | 0.00 | 760 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Chapa Charles, Alexis DanielMEX+10.83.5 pts · #4
- 2Sahagun Diaz, David AlfredoMEX+4.85.5 pts · #2
- 3FIDE 296308350.03.5 pts · #3
Top rating losers
- 1Salazar Amaro, Pedro MiguelMEX-15.63.5 pts · #9
- 2FIDE 296308350.03.5 pts · #3
- 3FIDE 296357560.02.5 pts · #6