Jonguitud Islas, Ruben
Current rating: 1314
Record: 6-18
| Grand Prix Mexico City 2016 (OGW limited) | starting rating: 1363 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Camacho Bernal, Carlos Alberto (1464) | Lost 0-2 | -161347 |
| 2sealed | 205 | Quiroz, Abraham (1488) | Lost 1-2 | -161331 |
| 3sealed | 342 | Galvez Bautista, Cesar (1392) | Lost 0-2 | -171314 |
| top | average opponent: 1448record: 0-3 | new rating: 1314 | ||
| Grand Prix Mexico City 2015 (FRF limited) | starting rating: 1369 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Alba Romero, Emmanuel (1480) | Won 2-1 | +201389 |
| 2sealed | 28 | Leyva Alvarado, Alejan (1518) | Won 2-0 | +201409 |
| 3sealed | 61 | Morales Vera, Luis Armado (1490) | Lost 1-2 | -161393 |
| 4sealed | 150 | Ramirez, Angel (1502) | Lost 1-2 | -161377 |
| 5sealed | 187 | Perez Bermudez, Alejandro (1603) | Lost 0-2 | -141363 |
| top | average opponent: 1519record: 2-3 | new rating: 1363 | ||
| Grand Prix Mexico City 2014 (BNG limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 213 | Guiza Garcia, Fernando (1530) | Lost 0-2 | -161412 |
| 2sealed | 189 | Urrutia, Carlos (1542) | Lost 0-2 | -161396 |
| 3sealed | 312 | Aguilar, Berenice (1464) | Won 2-0 | +191415 |
| 4sealed | 210 | Casasa, Miguel (1573) | Lost 1-2 | -151400 |
| 5sealed | 296 | Escutia, Eduardo (1465) | Won 2-1 | +191419 |
| 6sealed | 258 | Ramirez Reyna, Mario Alberto (1481) | Lost 1-2 | -161403 |
| 7sealed | 229 | Israel, Alfredo (1465) | Lost 1-2 | -171386 |
| 8sealed | 210 | Lara, Abraham (1448) | Lost 0-2 | -171369 |
| top | average opponent: 1496record: 2-6 | new rating: 1369 | ||
| Grand Prix Mexico City 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 207 | Flores Landeros, Omar (1500) | Lost 0-2 | -181482 |
| 2sealed | 298 | Ochoa Martinez, Oscar (1482) | Won 2-1 | +181500 |
| 3sealed | 190 | Gonzalez, Francisco (1499) | Lost 0-2 | -181482 |
| 4sealed | 230 | Alarcon Guevara, Ricardo Oman (1482) | Lost 0-2 | -181464 |
| 5sealed | 300 | mendoza, alfredo (1464) | Lost 0-2 | -181446 |
| 6sealed | 273 | Gutierrez, Felix (1446) | Lost 0-2 | -181428 |
| 7sealed | 258 | Popoca Mora, Iran (1428) | Won 2-0 | +181446 |
| 8sealed | 220 | Landeta, Ricardo (1446) | Lost 1-2 | -181428 |
| top | average opponent: 1468record: 2-6 | new rating: 1428 | ||