Marca, Gerwin
Current rating: 1490
Record: 5-6
| Grand Prix Providence 2015 (DTK standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 110 | Decker-Pond, Michael (1500) | Lost 1-2 | -181465 |
| 2standard | 323 | Olden, Zach (1482) | Won 2-0 | +181483 |
| 3standard | 279 | Roser, Will (1499) | Won 2-0 | +191502 |
| 4standard | 250 | Anderson, Todd (1936) | Lost 1-2 | -111491 |
| 5standard | 280 | Murphy, Michael (1431) | Won 2-0 | +171508 |
| 6standard | 255 | Carroll, Charles (1502) | Lost 1-2 | -181490 |
| average opponent: 1558record: 3-3 | new rating: 1490 | |||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 205 | Jort, Elias (1523) | Lost 1-2 | -181482 |
| 2sealed | 471 | Yatsenko, Alex (1499) | Lost 0-2 | -171465 |
| 3sealed | 751 | Small, Miriam (1463) | Won 2-1 | +181483 |
| 4sealed | 595 | Michener, James (1483) | Won 2-0 | +181501 |
| 5sealed | 443 | Stackhouse, Victoria (1496) | Lost 1-2 | -181483 |
| average opponent: 1493record: 2-3 | new rating: 1483 | |||