Johnston, Samuel
Current rating: 1452
Record: 3-6
| Grand Prix Barcelona 2018 (modern) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 56 | Mallet, Kevin (1500) | Won 2-0 | +181498 |
| 2modern | 3 | Barbagelata, Diego (1668) | Won 2-1 | +211519 |
| 3modern | 279 | Fischer, Hans Christian (1529) | Lost 0-2 | -181501 |
| 4modern | 472 | Linhares, Pedro (1466) | Lost 1-2 | -181483 |
| 5modern | 433 | Ramiro Cano, Adrian (1842) | Won 2-0 | +241507 |
| 6modern | 449 | Solivellas Galmes, Xisco (1446) | Lost 0-2 | -191488 |
| 7modern | 390 | Sucquet, Alexander (1563) | Lost 1-2 | -171471 |
| 8modern | 421 | Garcia, Gonzalo (1377) | Lost 0-2 | -191452 |
| average opponent: 1549record: 3-5 | new rating: 1452 | |||
| Grand Prix Liverpool 2017 (XLN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 250 | Middleton, Steven (1381) | Lost 0-2 | -201480 |
| record: 0-1 | new rating: 1480 | |||