McDonald, Marianne
Current rating: 1413
Record: 17-26-1
| Grand Prix London 2016 (KLD limited) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 735 | Franco, Marcos (1531) | Won 2-0 | +201432 |
| 2sealed | 174 | Derwort, Selmer (1558) | Lost 0-2 | -161416 |
| 3sealed | 907 | Boddy, Jordan (1560) | Won 2-0 | +211437 |
| 4sealed | 738 | Ho, John [ENG] (1646) | Won 2-1 | +211458 |
| 5sealed | 386 | Lin, Alessio (1575) | Lost 1-2 | -161442 |
| 6sealed | 428 | Nobari, Poya (1710) | Lost 0-2 | -131429 |
| 7sealed | 795 | Kardos, Krisztian (1507) | Lost 1-2 | -161413 |
| top | average opponent: 1584record: 3-4 | new rating: 1413 | ||
| Grand Prix Manchester 2016 (SOI standard) | starting rating: 1420 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 12 | Ho, Joshua (1500) | Won 2-1 | +201440 |
| 2standard | 305 | Hill, Jamie (1518) | Lost 1-2 | -171423 |
| 3standard | 635 | Maher, Daniel [IRL] (1502) | Won 2-0 | +201443 |
| 4standard | 524 | Baldwin, Guy (1466) | Lost 1-2 | -181425 |
| 5standard | 422 | Fysh, Paul (1456) | Lost 1-2 | -171408 |
| 6standard | 635 | Tonkin, Mathew (1457) | Lost 1-2 | -171391 |
| 7standard | 327 | Blagden, Noel (1464) | Lost 0-2 | -171374 |
| 8standard | 529 | Cousins, Richard (1393) | Won 2-0 | +181392 |
| 9standard | 424 | Osterberg, William (1464) | Won 2-0 | +201412 |
| top | average opponent: 1469record: 4-5 | new rating: 1412 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1379 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1296 | van der Sanden, Dick (1419) | Lost 0-2 | -171362 |
| 2sealed | 1379 | Langendries, Stijn (1482) | Won 2-0 | +201382 |
| 3sealed | 1405 | Tempelaars, Rocky (1501) | Won 2-1 | +201402 |
| 4sealed | 1156 | Grabnar, Tomaz (1592) | Lost 0-2 | -141388 |
| 5sealed | 1321 | Ng, Dominic (1498) | Won 2-1 | +201408 |
| 6sealed | 1166 | Garcia Freixa, Marc (1626) | Won 2-0 | +211429 |
| 7sealed | 1188 | Grove, Kevin (1959) | Lost 1-2 | -91420 |
| top | average opponent: 1582record: 4-3 | new rating: 1420 | ||
| Grand Prix Liverpool 2015 (FRF limited) | starting rating: 1406 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 90 | Mann, Tom (1500) | Won 2-0 | +191425 |
| 2sealed | 127 | Harman, Keiron (1513) | Lost 1-2 | -161409 |
| 3sealed | 368 | Miller, Darren (1497) | Lost 1-2 | -171392 |
| 4sealed | 676 | Williamson, David [ENG] (1484) | Lost 1-2 | -161376 |
| 5sealed | 696 | Zhao, Qifan (1606) | Won 2-0 | +221398 |
| 6sealed | 554 | Foster, Richard (1331) | Lost 1-2 | -191379 |
| top | average opponent: 1489record: 2-4 | new rating: 1379 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 49 | Steele, David (1500) | Won 2-0 | +191430 |
| 2block | 4 | Baxendale, Matthew (1518) | Lost 0-2 | -161414 |
| 3block | 497 | Dineva, Stella (1480) | Won 2-0 | +191433 |
| 4block | 22 | Foley, George (1518) | Won 2-0 | +201453 |
| 5block | 189 | Coates, Richard (1510) | Lost 1-2 | -171436 |
| 6block | 85 | Twizell, Max (1517) | Won 2-0 | +191455 |
| 7block | 227 | McCarthy, Matthew [ENG] (1545) | Lost 0-2 | -161439 |
| 8block | 20 | Cook, Matthew [ENG] (1518) | Lost 1-2 | -171422 |
| 9block | 215 | Lockett, James (1502) | Lost 0-2 | -161406 |
| top | average opponent: 1512record: 4-5 | new rating: 1406 | ||
| Grand Prix London 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 281 | Reid, Emma (1500) | Lost 0-2 | -181482 |
| 2sealed | 669 | Birkett, Philip (1465) | Lost 1-2 | -181464 |
| 3sealed | 756 | Carbajo Lopez, Daniel (1494) | Lost 0-2 | -181446 |
| 4sealed | 911 | O'Toole, Kevin (1444) | Lost 1-2 | -181428 |
| 5sealed | 829 | Rigby, Martin (1428) | Lost 0-2 | -181410 |
| 7sealed | 632 | Sharp, Martin (1427) | Draw 1-1 | +11411 |
| top | average opponent: 1460record: 0-5-1 | new rating: 1411 | ||