Marquez, David
Current rating: 1403
| Grand Prix Buenos Aires 2015 (DTK standard) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 1 | Rodriguez B, Rodrigo (1500) | Lost 1-2 | -171453 |
| 2standard | 191 | Tavella, Martin (1498) | Lost 1-2 | -171436 |
| 3standard | 330 | Ramadan, Sergio (1620) | Lost 0-2 | -151421 |
| 4standard | 323 | Lopez Geronazzo, Lauta (1444) | Lost 0-2 | -181403 |
| top | average opponent: 1515record: 0-4 | new rating: 1403 | ||
| Grand Prix Barcelona 2006 (GPT limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 40 | Fonseca Roque, Eric (1500) | Draw 1-1 | +11465 |
| 2sealed | 156 | Boveda, Javier (1521) | Lost 0-2 | -171448 |
| 3sealed | 211 | Lucas, Jose (1414) | Draw 1-1 | -11447 |
| 4sealed | 252 | Gonzalez Garcia, Migue (1466) | Won 2-0 | +181465 |
| 5sealed | 201 | Borga, Wilson (1527) | Lost 0-2 | -161449 |
| 6sealed | 208 | Romero, Jaume (1481) | Won 2-0 | +181467 |
| 7sealed | 158 | Monferrer, Daniel (1501) | Won 2-1 | +191486 |
| 8sealed | 115 | Castillo, Emilio (1596) | Lost 0-2 | -161470 |
| 9sealed | 111 | Gargallo, Enrique (1499) | Draw 1-1 | 01470 |
| top | average opponent: 1501record: 3-3-3 | new rating: 1470 | ||
| Grand Prix Madrid 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 226 | Heyne, Eric (1500) | Lost 0-2 | -181482 |
| 2sealed | 411 | Ruiz, Laura (1486) | Lost 0-2 | -181464 |
| top | average opponent: 1493record: 0-2 | new rating: 1464 | ||