Mexican op
Zacatecas 1973
| Date | Players | Type | Elo Average | Games | Rounds |
| 1973 | 14 | Swiss | 10 | 9 |
| Name | ELO | Points | ||
|
IM Frey Beckman, Kenneth | 3.0 | ||
| Ariel Pena, E. | 1.5 | |||
| Acevedo, Armando | 1.0 | |||
| Escondrillas, Carlos | 1.0 | |||
| Iglesias, Alfredo | 1.0 | |||
| Villarreal, Felix | 1.0 | |||
|
IM De Winter Gallegos, Willy | 1.0 | ||
| Ramirez, Benito | 0.5 | |||
 |
Ocampo, Raul | 0.0 | ||
| Valero, Edgar | 0.0 | |||
| Ruenes, J. | 0.0 | |||
|
FM Campos Ruiz, Alberto | 0.0 | ||
| Campos Ruiz, Moises | 0.0 | |||
 |
IM Grefe, John A | 0.0 | ||
Mexican op Games
| White | Black | Result | Round | Date | Opening | View |
| Acevedo, A | Frey Beckman, K | 0-1  |
? | 1973 | D11 Queen's Gambit Declined Slav, 3.Nf3 |   |
| Ariel Pena, E | Campos Ruiz, A | 1-0 |
? | 1973 | C09 French, Tarrasch, open variation, main line |   |
| Ariel Pena, E | Ramirez, B | ½-½ |
? | 1973 | B28 Sicilian, O'Kelly variation | |
| Escondrillas, C | Ruenes, J | 1-0 |
? | 1973 | B20 Sicilian defence | |
| Frey Beckman, K | Campos Ruiz, M | 1-0 |
? | 1973 | E61 King's Indian defence, 3.Nc3 | |
| Grefe, J | Iglesias, A | 0-1 |
? | 1973 | B89 Sicilian, Sozin, 7.Be3 | |
| Iglesias, A | Acevedo, A | 0-1 |
? | 1973 | E51 Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5 | |
| Ramirez, B | Frey Beckman, K | 0-1 |
? | 1973 | A07 Reti, King's Indian attack (Barcza system) | |
| Valero, E | De Winter Gallegos, W | 0-1 |
? | 1973 | B33 Sicilian defence | |
| Villarreal, F | Ocampo, R | 1-0 |
? | 1973 | B22 Sicilian, Alapin's variation (2.c3) | |
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