Roberts, Martin
Current rating: 1497
Record: 35-38-3
| Grand Prix Birmingham 2019 (modern) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 64 | Burton, Oliver (1550) | Lost 0-2 | -161457 |
| 2modern | 248 | Charles, Richard (1450) | Won 2-1 | +171474 |
| 3modern | 355 | Murphy, Nick (1426) | Won 2-1 | +181492 |
| 4modern | 279 | Bergerot, Nicolas (1721) | Draw 1-1 | +41496 |
| 5modern | 201 | Griggs, Leon (1519) | Won 2-0 | +181514 |
| 6modern | 129 | Boulbaz, Ismael (1529) | Lost 1-2 | -181496 |
| 7modern | 200 | Mcardle, Tim (1523) | Won 2-0 | +191515 |
| 8modern | 138 | Munro, Callum (1538) | Lost 0-2 | -181497 |
| top | average opponent: 1532record: 4-3-1 | new rating: 1497 | ||
| Grand Prix Liverpool 2017 (XLN limited) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 225 | Weeks, Greg (1500) | Won 2-0 | +181473 |
| 2sealed | 7 | Encinas Diez, Alvaro (1554) | Won 2-0 | +201493 |
| 3sealed | 168 | Bolton, Fergus (1541) | Won 2-1 | +191512 |
| 4sealed | 91 | Boldrini, Giulio (1857) | Won 2-1 | +241536 |
| 5sealed | 24 | Stadler, Jan (1769) | Lost 0-2 | -141522 |
| 6sealed | 93 | Wenger, Marc (1638) | Lost 1-2 | -161506 |
| 7sealed | 240 | Solberg, Erik (1540) | Won 2-0 | +191525 |
| 8sealed | 65 | Sanchez, Francisco (1798) | Won 2-0 | +231548 |
| 9sealed | 36 | Kohn, Michel (1887) | Lost 1-2 | -121536 |
| 10draft | 169 | Sanders, Dominic (1723) | Lost 0-2 | -151521 |
| 11draft | 137 | Jenkins, Joseph (1504) | Lost 0-2 | -181503 |
| 12draft | 107 | Tomis, Jan (1538) | Lost 0-2 | -181485 |
| 13draft | 129 | Barnes, Craig (1725) | Won 2-1 | +231508 |
| 14draft | 113 | Pietikainen, Viljami (1547) | Lost 1-2 | -181490 |
| 15draft | 93 | [anonymous] | Lost 1-2 | -171473 |
| top | average opponent: 1644record: 7-8 | new rating: 1473 | ||
| Grand Prix Birmingham 2017 (modern) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 11 | Thomann, Matthias (1484) | Lost 1-2 | -191497 |
| 2modern | 536 | Scourfield, Ieuan (1467) | Lost 0-0 | -181479 |
| 3modern | 747 | Sylvester, Ryan (1393) | Lost 1-2 | -201459 |
| 4modern | 816 | Briscoe, Lance (1446) | Lost 0-2 | -181441 |
| 5modern | 807 | Bentinck, Will (1385) | Lost 0-2 | -191422 |
| 6modern | 764 | Bateman, Rickey (1410) | Won 2-0 | +181440 |
| 7modern | 689 | McNally, Graham (1351) | Won 2-1 | +161456 |
| 8modern | 615 | Mansveld, Julian (1385) | Won 2-1 | +171473 |
| 9modern | 533 | Cosbie-Ross, Nathaniel (1462) | Lost 0-2 | -181455 |
| top | average opponent: 1420record: 3-6 | new rating: 1455 | ||
| Grand Prix Manchester 2016 (SOI standard) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 59 | Friar, Matt (1500) | Won 2-0 | +181513 |
| 2standard | 159 | Vuillot, Samuel (1868) | Lost 1-2 | -121501 |
| 3standard | 615 | Mawhood, Matthew (1503) | Won 2-0 | +181519 |
| 4standard | 432 | Caley, Shaun (1467) | Lost 1-2 | -191500 |
| 5standard | 581 | Whyte, Ailsa (1461) | Won 2-0 | +181518 |
| 6standard | 398 | Irons, Nancy (1484) | Lost 1-2 | -191499 |
| 7standard | 410 | Porteous, Douglas (1433) | Won 2-0 | +171516 |
| 8standard | 304 | Kosma, Joe (1508) | Lost 1-2 | -181498 |
| 9standard | 380 | Fifield, Chris (1503) | Won 2-1 | +181516 |
| top | average opponent: 1525record: 5-4 | new rating: 1516 | ||
| Grand Prix London 2015 (ORI standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 217 | Faivre, Boris (1442) | Won 2-1 | +171482 |
| 2standard | 11 | Smith, Daniel G (1560) | Lost 1-2 | -161466 |
| 3standard | 267 | Wilson, Joshua [ENG] (1502) | Won 2-1 | +181484 |
| 4standard | 236 | Coates, Richard (1510) | Won 2-1 | +191503 |
| 5standard | 84 | Jara Perez, Juan Carlos (1630) | Lost 0-2 | -161487 |
| 6standard | 172 | Stevens, Nicola (1515) | Won 2-1 | +191506 |
| 7standard | 218 | Nuthall, Mark (1537) | Won 2-1 | +181524 |
| 8standard | 142 | Baudys, Ondrej (1808) | Lost 0-2 | -131511 |
| 9standard | 140 | Hall, Andy (1611) | Lost 1-2 | -161495 |
| top | average opponent: 1568record: 5-4 | new rating: 1495 | ||
| Grand Prix Liverpool 2015 (FRF limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 77 | Dalmady, Richard (1500) | Lost 1-2 | -181445 |
| 2sealed | 580 | Shah, Michael (1487) | Draw 1-1 | +11446 |
| 3sealed | 725 | Shapiro, James (1548) | Lost 1-2 | -161430 |
| 4sealed | 775 | Langdon, Stephen (1463) | Won 2-0 | +191449 |
| 5sealed | 646 | Paschali, Chris (1433) | Lost 0-2 | -191430 |
| 6sealed | 573 | Yao, Zhiqiang (1446) | Draw 1-1 | +11431 |
| 7sealed | 454 | Yeh, James (1410) | Won 2-1 | +171448 |
| 8sealed | 344 | Rogowska Borys, Dorota (1367) | Won 2-0 | +171465 |
| top | average opponent: 1457record: 3-3-2 | new rating: 1465 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 298 | Mitchell, Stuart (1427) | Won 2-1 | +171495 |
| 2block | 319 | Maxwell, Michael (1599) | Won 2-1 | +201515 |
| 3block | 240 | Pope, David (1477) | Lost 0-2 | -181497 |
| 4block | 281 | Norton, Matthew [ENG] (1467) | Won 2-1 | +171514 |
| 5block | 419 | Richardson, Alasdair (1571) | Lost 0-2 | -171497 |
| 6block | 366 | Douglas, Ewan (1520) | Lost 0-2 | -171480 |
| 7block | 353 | Maw, Alexander (1498) | Won 2-1 | +181498 |
| 8block | 208 | White, Dominic (1513) | Lost 1-2 | -181480 |
| 9block | 228 | Pettit, Josh (1510) | Lost 0-2 | -171463 |
| top | average opponent: 1509record: 4-5 | new rating: 1463 | ||
| Grand Prix London 2011 (MBS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 95 | Flounders, Ben (1454) | Lost 0-2 | -191481 |
| 2sealed | 94 | Brooks, Matt [ENG] (1481) | Won 2-0 | +181499 |
| 3sealed | 93 | Holen, Sverre (1475) | Lost 0-2 | -181481 |
| 4sealed | 137 | Tan, Ronnie (1452) | Won 2-1 | +171498 |
| 5sealed | 97 | Pashley, Stephen (1427) | Won 2-0 | +171515 |
| 6sealed | 80 | Deligiorgis, Constanti (1466) | Won 2-1 | +171532 |
| 7sealed | 39 | Beaver, Paul (1487) | Lost 0-2 | -191513 |
| 8sealed | 64 | Chlupac, Zdenek (1545) | Lost 0-2 | -171496 |
| 9sealed | 52 | Waczynski, Witold (1527) | Lost 0-2 | -181478 |
| top | average opponent: 1479record: 4-5 | new rating: 1478 | ||