4to. Magistral VI Realzando el Ajedrez
10 players participated in this 9-round tournament, held from 15 Nov 2025 to 17 Nov 2025 in GTO, Leon, Mexico. 3 titled players. Top 10 Elo average was 2039, and top seed was Guillermo Dominguez Aguilar (🇲🇽 MEX, IM, 2246).
Sid Diego Silva Sobreyra (🇲🇽 MEX, 2088) won with 7.5/9, ahead of Alfredo Asaf Rivera Perez (7.0) and David Rey Lozano Garay (6.0). Silva Sobreyra won solo starting round 8.
The biggest upset came in round 2: David Rey Lozano Garay (2038) beat Guillermo Dominguez Aguilar (IM, 2246), a +208-point gap.
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How it unfolded
Top 10 · 9 roundsSid Diego Silva Sobreyra led from R2 onwards, the runner-up race stayed tight.
Sid Diego Silva Sobreyra held the sole lead from R2 through R9 without losing it.
Sid Diego Silva Sobreyra drew with Alfredo Asaf Rivera Perez (White).
Sid Diego Silva Sobreyra 3 wins (R6–R8)Alfredo Asaf Rivera Perez 4 wins (R4–R7)
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇲🇽Silva Sobreyra, Sid Diego | 2088 | * | ½ | ½ | 1 | ½ | 1 | 1 | 1 | 1 | 1 | 7.5 | 28.50 | 37.5 | +96.4 | 2310 |
| 2 | 🇲🇽Rivera Perez, Alfredo Asaf | 2091 | ½ | * | 1 | 0 | 1 | 1 | 1 | 1 | ½ | 1 | 7.0 | 27.25 | 38.0 | +76.4 | 2257 |
| 4 | 🇲🇽Lozano Garay, David Rey | 2038 | ½ | 0 | * | 1 | ½ | 0 | 1 | 1 | 1 | 1 | 6.0 | 21.75 | 39.0 | +62.8 | 2168 |
| 3 | 🇲🇽IMDominguez Aguilar, Guillermo | 2246 | 0 | 1 | 0 | * | ½ | 1 | 1 | ½ | 1 | 1 | 6.0 | 21.50 | 39.0 | -9.5 | 2149 |
| 5 | 🇲🇽Lino Lopez, Israel | 2084 | ½ | 0 | ½ | ½ | * | ½ | 1 | ½ | ½ | 1 | 5.0 | 18.75 | 40.0 | -0.2 | 2081 |
| 6 | 🇲🇽CMRuiz Bolanos, Eithan | 2074 | 0 | 0 | 1 | 0 | ½ | * | 0 | ½ | 1 | 1 | 4.0 | 12.50 | 41.0 | -35.6 | 1996 |
| 7 | 🇲🇽Abarca Guzman, Efren | 2030 | 0 | 0 | 0 | 0 | 0 | 1 | * | 1 | 1 | 1 | 4.0 | 9.50 | 41.0 | -6.4 | 2001 |
| 8 | 🇲🇽WFMDuarte Cramer, Lily Jeanette | 1870 | 0 | 0 | 0 | ½ | ½ | ½ | 0 | * | ½ | 1 | 3.0 | 9.00 | 42.0 | +9.2 | 1933 |
| 9 | 🇲🇽Garcia Espinoza, Jose Jesus | 2061 | 0 | ½ | 0 | 0 | ½ | 0 | 0 | ½ | * | ½ | 2.0 | 7.75 | 43.0 | -54.4 | 1820 |
| 10 | 🇲🇽Ramirez Rodriguez, Heber | 1807 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ½ | * | 0.5 | 1.00 | 44.5 | -24.6 | 1620 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Silva Sobreyra, Sid DiegoMEX+96.47.5 pts · #1
- 2Rivera Perez, Alfredo AsafMEX+76.47.0 pts · #2
- 3Lozano Garay, David ReyMEX+62.86.0 pts · #4
- 1Garcia Espinoza, Jose JesusMEX-54.42.0 pts · #9
- 2Ruiz Bolanos, EithanCMMEX-35.64.0 pts · #6
- 3Ramirez Rodriguez, HeberMEX-24.60.5 pts · #10
- R2+208 Elo gap
- R7+158 Elo gap