I Campeonato Nacional de Ajedrez Mazatlan 2025
SwissStandard
43 players participated in this 6-round tournament, held from 13 Jun 2025 to 15 Jun 2025 in SIN, Mazatlan, Mexico. 17 titled players from 3 federations. Top 10 Elo average was 2370, and top seed was Jorge Cori (🇵🇪 PER, GM, 2601).
Jorge Cori (🇵🇪 PER, GM, 2601) won with 5.0/6, ahead of Julio Cesar Diaz Rosas (4.5) and Arturo A. Fernandez Hernandez (4.5). Cori broke clear in the final round.
The biggest upset came in round 1: Fidel Machado Cruz (1958) beat Juan Carlos Obregon Rivero (GM, 2477), a +519-point gap.
Location
🇲🇽SIN, Mazatlan, Mexico
Dates
13 Jun 2025 → 15 Jun 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 6 rounds
Titled players · 17
GM×4
IM×3
FM×4
CM×3
WFM×2
WCM×1
Federations · 3 represented
🇲🇽Mexico×41
🇨🇺Cuba×1
🇵🇪Peru×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsGM Jorge Cori led from R6; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R6.
Co-leaders
18
8
3
2
2
1
R6–R6 · LEAD HELD
GM Jorge Cori held the sole lead from R6 through R6 without losing it.
R5 · HEAD-TO-HEAD · WINNER VS 2ND
GM Jorge Cori drew with IM Julio Cesar Diaz Rosas (Black).
WIN STREAKS · 2 top finishers
GM Jorge Cori 4 wins (R1–R4)IM Julio Cesar Diaz Rosas 4 wins (R1–R4)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1GMJorge Cori | * | ½ | — | ½ |
| 2IMJulio Cesar Diaz Rosas | ½ | * | 0 | 1 |
| 3FMArturo A. Fernandez Hernandez | — | 1 | * | — |
| 4FMCarlos Francisco Varela Velazquez | ½ | 0 | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Cori, JorgeGM | 2601 | PER | +43N | +15B | +8N | +5B | =2N | =4B | 5.0 | 20.5 | 21.0 | 16.50 | 2546 | -2.0 |
| 2 | Diaz Rosas, Julio CesarIM | 2373 | MEX | +29N | +14B | +4N | +6B | =1B | −3N | 4.5 | 21.5 | 24.0 | 17.00 | 2453 | +7.9 |
| 3 | Fernandez Hernandez, Arturo A.FM | 2300 | MEX | +17N | +28B | =6N | =7B | =5N | +2B | 4.5 | 19.5 | 22.0 | 16.00 | 2479 | +30.0 |
| 4 | Varela Velazquez, Carlos FranciscoFM | 2085 | MEX | +26B | +18N | −2B | +24N | +10B | =1N | 4.5 | 19.0 | 21.5 | 14.50 | 2361 | +78.4 |
| 5 | Lopez Gonzalez, Abel FabianIM | 2391 | CUB | +12B | +23N | +9B | −1N | =3B | =6B | 4.0 | 21.5 | 24.5 | 15.25 | 2390 | +2.3 |
| 6 | Quesada Perez, Luis ErnestoGM | 2546 | MEX | +19B | +27N | =3B | −2N | +25B | =5N | 4.0 | 18.5 | 21.0 | 12.25 | 2375 | -10.1 |
| 7 | Gonzalez Zamora, Juan CarlosGM | 2458 | MEX | +22B | =25N | =11B | =3N | +27B | =9N | 4.0 | 18.0 | 20.5 | 13.00 | 2269 | -11.4 |
| 8 | Benitez Lozano, JavierFM | 2269 | MEX | +34B | +13N | −1B | =25N | =14B | +19N | 4.0 | 18.0 | 20.0 | 12.00 | 2237 | -3.0 |
| 9 | Benavente Vazquez, Juan JoseCM | 2136 | MEX | +30N | +24B | −5N | =17B | +28N | =7B | 4.0 | 16.0 | 18.5 | 11.00 | 2202 | +11.2 |
| 10 | Obregon Rivero, Juan CarlosGM | 2477 | MEX | −18N | +26B | +33N | +20B | −4N | +17B | 4.0 | 16.0 | 18.0 | 10.50 | 2210 | -15.0 |
| 11 | Perez Avendano, Paul OmarFM | 2142 | MEX | =33N | +38B | =7N | =14B | =17N | +18B | 4.0 | 15.5 | 17.0 | 10.75 | 2121 | -0.8 |
| 12 | Garcia Ibarra, David Fernando | 1936 | MEX | −5N | =40B | +38N | =35B | +20N | +27B | 4.0 | 13.0 | 14.0 | 8.50 | 2140 | +62.0 |
| 13 | Arvizu Borchardt, David Ivan | 2044 | MEX | +41N | −8B | −24N | +39B | +21N | +35B | 4.0 | 13.0 | 14.0 | 7.50 | 2056 | +4.4 |
| 14 | Chavez Dominguez, Lenin Odin | 2052 | MEX | +31B | −2N | +22B | =11N | =8N | =15B | 3.5 | 19.0 | 21.5 | 11.25 | 2171 | +19.4 |
| 15 | Fernandez Pozas, Pablo Antonio | 2143 | MEX | +21B | −1N | =19B | =29N | +22B | =14N | 3.5 | 17.5 | 20.0 | 10.50 | 2121 | -4.4 |
| 16 | Flores Pacheco, Sebastian | 1891 | MEX | =20N | −33B | +30N | −28B | +38N | +24B | 3.5 | 12.5 | 14.0 | 8.00 | 1938 | +16.8 |
| 17 | Magana Morales, Roberto | 1933 | MEX | −3B | +42N | +23B | =9N | =11B | −10N | 3.0 | 19.5 | 20.5 | 8.00 | 2114 | +19.4 |
| 18 | Machado Cruz, Fidel | 1958 | MEX | +10B | −4B | =35N | =34N | +36B | −11N | 3.0 | 16.5 | 18.5 | 8.00 | 2111 | +22.0 |
| 19 | Briceno Campos, Angel Gabriel | 1932 | MEX | −6N | +37B | =15N | =21B | +34N | −8B | 3.0 | 16.5 | 18.5 | 7.25 | 2062 | +33.6 |
| 20 | Molina Mendoza, OmarCM | 2115 | MEX | =16B | +36N | =25B | −10N | −12B | +34B | 3.0 | 16.0 | 18.0 | 7.00 | 2060 | -10.0 |
| 21 | Urias Beltran, Jairo Jonas | 1903 | MEX | −15N | =43B | +32B | =19N | −13B | +36N | 3.0 | 15.0 | 15.5 | 6.25 | 2046 | +44.8 |
| 22 | Torres Rivas, Felipe de Jesus | 1986 | MEX | −7N | +39B | −14N | +40B | −15N | +37B | 3.0 | 14.5 | 15.5 | 4.50 | 1997 | +0.2 |
| 23 | Robledo Flores, Emanuel | 2019 | MEX | +40B | −5B | −17N | =26N | =24B | +33B | 3.0 | 14.0 | 15.0 | 5.50 | 1933 | -14.0 |
| 24 | Espana Gonzalez, Jayr | 1763 | MEX | +32B | −9N | +13B | −4B | =23N | −16N | 2.5 | 19.0 | 21.5 | 8.00 | 1992 | +59.2 |
| 25 | Felix Soto, Alfredo | 2107 | MEX | +39N | =7B | =20N | =8B | −6N | F | 2.5 | 17.5 | 19.0 | 7.00 | 2246 | +14.8 |
| 26 | Cruz Plazola, Demetrio | 1950 | MEX | −4N | −10N | +31B | =23B | =33N | =29B | 2.5 | 16.5 | 18.5 | 6.25 | 1946 | -7.2 |
| 27 | Turincio Garcia, SergioCM | 2121 | MEX | +37N | −6B | =29N | +33B | −7N | −12N | 2.5 | 16.5 | 18.5 | 5.25 | 2027 | -17.2 |
| 28 | Hernandez Diaz, Paula SofiaWFM | 2012 | MEX | +42B | −3N | =34B | +16N | −9B | F | 2.5 | 16.5 | 17.5 | 5.50 | 1979 | -5.2 |
| 29 | Leon Espinoza, Edgar | 1968 | MEX | −2B | +31N | =27B | =15B | −35N | =26N | 2.5 | 15.5 | 17.5 | 6.75 | 2023 | +10.8 |
| 30 | Magana Morales, David | 1903 | MEX | −9B | =32N | −16B | −31N | +42N | +38B | 2.5 | 14.0 | 15.0 | 3.75 | 1765 | -18.6 |
| 31 | Valverde Gonzalez, Dante Aldebara | 1766 | MEX | −14N | −29B | −26N | +30B | =39N | +41N | 2.5 | 12.5 | 13.5 | 4.25 | 1819 | +14.4 |
| 32 | Magana Cazares, Jesus Cuau | 2119 | MEX | −24N | =30B | −21N | −38B | +40N | +39B | 2.5 | 11.0 | 12.0 | 3.75 | 1759 | -51.6 |
| 33 | Hernandez Santos, Hugo Israel | 1831 | MEX | =11B | +16N | −10B | −27N | =26B | −23N | 2.0 | 17.0 | 19.5 | 6.75 | 1934 | +12.0 |
| 34 | Espana Gonzalez, Jaime | 1935 | MEX | −8N | +41B | =28N | =18B | −19B | −20N | 2.0 | 15.5 | 16.5 | 3.75 | 1845 | -26.4 |
| 35 | Blanco Sing, IsraelIM | 2127 | MEX | F | F | =18B | =12N | +29B | −13N | 2.0 | 13.5 | 13.5 | 6.00 | 1977 | -7.9 |
| 36 | Guillen Cristobal, Sandra NWFM | 2016 | MEX | =38N | −20B | =40N | +37B | −18N | −21B | 2.0 | 12.5 | 13.5 | 3.25 | 1734 | -42.2 |
| 37 | Aroche Ramos, Cesar Armando | 1789 | MEX | −27B | −19N | +42B | −36N | +41B | −22N | 2.0 | 11.5 | 12.5 | 2.00 | 1671 | -28.8 |
| 38 | Sanchez Lopez, KerenWCM | 1660 | MEX | =36B | −11N | −12B | +32N | −16B | −30N | 1.5 | 16.5 | 18.5 | 3.50 | 1785 | +13.0 |
| 39 | Mendoza Osorio, Ernesto | 1880 | MEX | −25B | −22N | +41B | −13N | =31B | −32N | 1.5 | 14.5 | 15.5 | 2.25 | 1728 | -44.8 |
| 40 | Mendoza Recio, Josselyne | 1731 | MEX | −23N | =12N | =36B | −22N | −32B | −42N | 1.0 | 14.5 | 15.5 | 3.00 | 1775 | +3.2 |
| 41 | Aroche Ramos, Danae Guadalupe | 1501 | MEX | −13B | −34N | −39N | +42B | −37N | −31B | 1.0 | 12.0 | 13.0 | 1.00 | 1047 | -23.6 |
| 42 | Barajas Estrada, Antonio | 0 | MEX | −28N | −17B | −37N | −41N | −30B | +40B | 1.0 | 11.0 | 12.0 | 1.00 | 1538 | 0.0 |
| 43 | Lozoya Burgueno, Arturo | 2021 | MEX | −1B | =21N | F | F | F | F | 0.5 | 8.0 | 8.0 | 1.50 | 1969 | -4.8 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Varela Velazquez, Carlos FranciscoFMMEX+78.44.5 pts · #4
- 2Garcia Ibarra, David FernandoMEX+62.04.0 pts · #11
- 3Espana Gonzalez, JayrMEX+59.22.5 pts · #26
Top rating losers
- 1Magana Cazares, Jesus CuauMEX-51.62.5 pts · #24
- 2Mendoza Osorio, ErnestoMEX-44.81.5 pts · #36
- 3Guillen Cristobal, Sandra NWFMMEX-42.22.0 pts · #34
Biggest upsets
- R1+519 Elo gap
- R4+459 Elo gap
- R5+392 Elo gap