Ma, Geoffrey
Current rating: 1531
Record: 7-6
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 236 | Aihara, Hiroki (1476) | Won 2-1 | +181518 |
| 2sealed | 312 | Kazama, Yusaku (1626) | Won 2-0 | +201538 |
| 3sealed | 396 | Katou, Susumu (1648) | Won 2-0 | +201558 |
| 4sealed | 61 | Makino, Takahito (1463) | Won 2-1 | +161574 |
| 5sealed | 92 | Suzuki, Ryo 0608 (1574) | Lost 0-2 | -181556 |
| 6sealed | 172 | Takahashi, Osamu (1595) | Won 2-1 | +191575 |
| 7sealed | 147 | Harada, Dampei (1725) | Lost 0-2 | -161559 |
| 8sealed | 243 | Mizoguchi, Satoru (1610) | Won 2-1 | +191578 |
| 9sealed | 95 | Kozaki, Yosuke (1653) | Lost 1-2 | -161562 |
| 10draft | 167 | Harada, Masato (1600) | Lost 1-2 | -181544 |
| 11draft | 90 | Takaya, Syouichi (1665) | Lost 0-2 | -161528 |
| 12draft | 43 | Nakamoto, Naoki (1488) | Won 2-1 | +181546 |
| 13draft | 171 | Usui, Haruki (1713) | Lost 1-2 | -151531 |
| average opponent: 1603record: 7-6 | new rating: 1531 | |||