Altamirano, Oscar
Current rating: 1632
| Grand Prix Mexico City 2014 (BNG limited) | starting rating: 1593 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 250 | Aguayo Barroso, Alvar (1500) | Lost 0-2 | -201573 |
| 2sealed | 253 | Silos Rodriguez, Hector (1482) | Won 2-0 | +161589 |
| 3sealed | 243 | Alba Guzman, Eduardo (1500) | Won 2-0 | +171606 |
| 4sealed | 133 | Anzorena, Pablo (1498) | Draw 1-1 | -21604 |
| 5sealed | 126 | Razo Torres, Teodoro (1552) | Won 2-0 | +171621 |
| 6sealed | 78 | Massa Anaya, Hiram (1508) | Won 2-0 | +161637 |
| 7sealed | 48 | Semoloni, Raul (1494) | Won 2-1 | +151652 |
| 8sealed | 29 | Quintero, Adad (1553) | Lost 0-2 | -201632 |
| top | average opponent: 1511record: 5-2-1 | new rating: 1632 | ||
| Grand Prix Mexico City 2012 (DKA limited) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 80 | Caballero, Homero (1500) | Won 2-0 | +171552 |
| 2sealed | 152 | Urrutia del Villar, Mao (1518) | Draw 1-1 | -11551 |
| 3sealed | 94 | Rodriguez, Miguel Angel (1518) | Won 2-0 | +181569 |
| 4sealed | 77 | Perez Regalado, Cesar (1536) | Won 2-1 | +171586 |
| 5sealed | 35 | Flores, Edgar [MEX] (1537) | Draw 1-1 | -11585 |
| 6sealed | 80 | Torres, Carlos-Ezequiel (1524) | Won 2-0 | +171602 |
| 7sealed | 48 | Lopez Ordonez, Salatiel (1502) | Won 2-0 | +161618 |
| 8sealed | 27 | Parra Trujillo, Rafael (1600) | Won 2-0 | +181636 |
| 9draft | 56 | Mancilla Hernandez, Carlos (1649) | Lost 1-2 | -181618 |
| 10draft | 12 | Chacon, Salomon (1484) | Lost 0-0 | -201598 |
| 11draft | 26 | Santana, Hugo (1520) | Lost 0-2 | -201578 |
| 12draft | 3 | Herrera, Marco (1492) | Won 2-1 | +171595 |
| 13draft | 37 | Gosch Acosta, Francisco Fernando (1498) | Won 2-0 | +161611 |
| 14draft | 19 | Lugo, David (1590) | Lost 0-2 | -181593 |
| top | average opponent: 1533record: 8-4-2 | new rating: 1593 | ||
| Grand Prix Mexico City 2005 (Kamigawa block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 35 | De Valdemar Romero, Erwin Alejandro (1500) | Won 2-1 | +181518 |
| 2block | 27 | Searles, James (1461) | Lost 0-2 | -191499 |
| 3block | 92 | Sandoval Garcia, Vicente (1500) | Lost 0-2 | -181481 |
| 4block | 115 | Jimenez, Jose (1482) | Won 2-1 | +181499 |
| 5block | 92 | Hernandez Aviles, Fernando D (1500) | Draw 1-1 | 01499 |
| 6block | 86 | Viesca Gutierrez, Ricardo (1500) | Won 2-1 | +181517 |
| 7block | 63 | Ponce Franco, Jose Manuel (1499) | Won 2-0 | +181535 |
| top | average opponent: 1492record: 4-2-1 | new rating: 1535 | ||