Grinsell, John
Current rating: 1428
Record: 1-5
| Grand Prix Minneapolis 2005 (Kamigawa block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 131 | Brown, Larry (1500) | Lost 1-2 | -181482 |
| 2block | 140 | Jendro, Joe (1482) | Lost 1-2 | -181464 |
| 3block | 169 | Shchetinkin, Nickolay (1464) | Lost 0-2 | -181446 |
| 4block | 177 | Mickols, Eric (1446) | Lost 0-2 | -181428 |
| 5block | 158 | Irish, Ryan (1429) | Won 2-1 | +181446 |
| 6block | 131 | Anderson, Jacob (1446) | Lost 0-2 | -181428 |
| average opponent: 1461record: 1-5 | new rating: 1428 | |||