Koh, Guangyong
Current rating: 1563
Record: 9-6
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 87 | Snider, Jason (1467) | Won 2-0 | +171544 |
| 2legacy | 182 | Cooper, John (1516) | Lost 0-2 | -181526 |
| 3legacy | 402 | Aitken, William (1701) | Lost 0-2 | -151511 |
| 4legacy | 512 | Schmidt, Ben (1499) | Won 2-1 | +181529 |
| 5legacy | 407 | Wojcak, Wade (1509) | Won 2-0 | +171546 |
| 6legacy | 297 | Stecher, Zach (1541) | Won 2-0 | +181564 |
| 7legacy | 250 | Colegrove, Bobby (1509) | Won 2-1 | +171581 |
| 8legacy | 91 | Connolly, Robert (1545) | Lost 0-2 | -181563 |
| average opponent: 1536record: 5-3 | new rating: 1563 | |||
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 384 | Masalski, Michael (1500) | Lost 0-2 | -181482 |
| 2sealed | 778 | Miller, Michael (1380) | Lost 0-2 | -201462 |
| 3sealed | 828 | Huppman, Marc (1462) | Won 2-0 | +181480 |
| 4sealed | 764 | Smith, Andrew (1817) | Won 2-1 | +241504 |
| 5sealed | 581 | Lewis, Nicholas (1491) | Won 2-1 | +181522 |
| 6sealed | 456 | Cheung, Gabriel (1580) | Won 2-0 | +191541 |
| 7sealed | 189 | Ogreenc, Greg (1799) | Lost 0-2 | -141527 |
| average opponent: 1575record: 4-3 | new rating: 1527 | |||