Boast, Mark
Current rating: 1427
| Grand Prix Lyon 2018 (modern) | starting rating: 1416 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 544 | Baroni, Stefano (1702) | Won 2-0 | +231439 |
| 2modern | 410 | Jacobs, Bob (1398) | Lost 1-2 | -191420 |
| 3modern | 480 | Abt, Robin (1552) | Lost 1-2 | -151405 |
| 4modern | 721 | Rielves, Alvaro (1617) | Won 2-0 | +221427 |
| 5modern | 553 | decock, alain (1485) | Won 2-0 | +191446 |
| 6modern | 336 | Glover, Laurie (1468) | Lost 0-2 | -181428 |
| 7modern | 488 | Maeda, Takayuki (1205) | Won 2-1 | +141442 |
| 8modern | 434 | Amrani, Omar (1611) | Lost 1-2 | -151427 |
| top | average opponent: 1505record: 4-4 | new rating: 1427 | ||
| Grand Prix Birmingham 2017 (modern) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 92 | Smith, Tom (1524) | Lost 0-2 | -171447 |
| 2modern | 584 | Bloch, Henrik (1470) | Won 0-0 | +191466 |
| 3modern | 487 | Scourfield, Ieuan (1486) | Won 2-1 | +181484 |
| 4modern | 346 | Brown, Christopher [ENG] (1500) | Won 2-1 | +181502 |
| 5modern | 255 | Arbona Martinez, Marc (1512) | Lost 0-2 | -181484 |
| 6modern | 426 | Frith, Oliver (1621) | Lost 0-2 | -151469 |
| 7modern | 584 | Ward, Jack (1433) | Lost 1-2 | -191450 |
| 8modern | 577 | Griner, Zachary (1566) | Lost 1-2 | -161434 |
| 9modern | 529 | Isaacs, Paul (1417) | Lost 1-2 | -181416 |
| top | average opponent: 1503record: 3-6 | new rating: 1416 | ||
| Grand Prix Manchester 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 220 | Soule, Erik (1500) | Lost 0-2 | -181482 |
| 2standard | 428 | Welberry, David (1483) | Won 2-0 | +181500 |
| 3standard | 637 | Soper, Russell (1500) | Draw 1-1 | 01500 |
| 4standard | 573 | Nayegon-Bishop, Tobias (1506) | Lost 0-2 | -181482 |
| 5standard | 654 | Mcmullan, Stephen (1482) | Lost 1-2 | -181464 |
| top | average opponent: 1494record: 1-3-1 | new rating: 1464 | ||