Simons, Marvyn
Current rating: 1609
Record: 24-19
| Grand Prix London 2015 (ORI standard) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 599 | Segal, Wesley (1466) | Won 2-0 | +171536 |
| 2standard | 740 | Ehrler, Matthias (1288) | Won 2-0 | +141550 |
| 3standard | 643 | Taylor, Phil (1536) | Won 2-0 | +181568 |
| 4standard | 636 | Godwin, Sam (1463) | Won 2-1 | +161584 |
| 5standard | 608 | Catton, Rob (1587) | Lost 1-2 | -181566 |
| 6standard | 705 | Rees, Alastair (1622) | Won 2-0 | +191585 |
| 7standard | 429 | Matlay, James (1576) | Lost 0-2 | -181567 |
| 8standard | 517 | Chaffey, Joel W (1529) | Won 2-0 | +171584 |
| 9standard | 323 | Krakowczyk, Arthur (1572) | Won 2-0 | +181602 |
| 10standard | 112 | Manning, Niall (1575) | Won 2-0 | +171619 |
| 11standard | 25 | Duggan, Matthew [ENG] (1699) | Lost 0-2 | -161603 |
| 12standard | 71 | Gilson, Daniel (1596) | Lost 0-2 | -181585 |
| 13standard | 84 | Milis, Michael (1782) | Won 2-1 | +211606 |
| 14standard | 81 | Kenyeres, Akos (1765) | Lost 1-2 | -151591 |
| 15standard | 75 | Misevic, Nikola (1582) | Won 2-1 | +181609 |
| top | average opponent: 1576record: 10-5 | new rating: 1609 | ||
| Grand Prix Utrecht 2014 (M15 standard) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 18 | Wilmotte, Sebastien (1616) | Lost 1-2 | -151443 |
| 2standard | 423 | Pignon, Jean-Marie (1402) | Won 2-1 | +171460 |
| 3standard | 417 | Colding-Jorgensen, Martin (1455) | Won 2-1 | +181478 |
| 4standard | 255 | Messerschmidt, Jan (1536) | Won 2-1 | +191497 |
| 5standard | 233 | Bott, Sebastian (1574) | Won 2-0 | +191516 |
| 6standard | 70 | Misnik, Mateusz (1571) | Lost 1-2 | -171499 |
| 7standard | 230 | Von Loh, Ivan (1552) | Won 2-0 | +191518 |
| 8standard | 109 | Lauwers, Jelle (1558) | Lost 0-2 | -171501 |
| 9standard | 237 | Vaes, Maarten (1521) | Won 2-1 | +181519 |
| top | average opponent: 1532record: 6-3 | new rating: 1519 | ||
| Grand Prix Lille 2012 (DKA standard) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 529 | Lutz, Jimmy (1518) | Lost 0-2 | -181496 |
| 3standard | 697 | Jarrai, Selim (1503) | Lost 0-2 | -181478 |
| 4standard | 811 | Bondon, Pierre (1445) | Lost 1-2 | -181460 |
| 5standard | 828 | Loonis, Wennael (1462) | Won 2-1 | +181478 |
| 6standard | 773 | Beuscart, Jean Marie (1421) | Won 2-1 | +171495 |
| 7standard | 749 | Rosenfjeld, Soren (1481) | Lost 1-2 | -181477 |
| 8standard | 717 | Haller, Vincent (1430) | Lost 0-2 | -191458 |
| top | average opponent: 1466record: 2-5 | new rating: 1458 | ||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 264 | Launois, Loic (1521) | Won 2-0 | +181542 |
| 2legacy | 127 | Figlarz, Johan (1514) | Won 2-0 | +171559 |
| 3legacy | 43 | Rubies Mouliaa, Joan (1464) | Lost 1-2 | -201539 |
| 4legacy | 148 | Canavesi, Daniele (1888) | Lost 1-2 | -111528 |
| 5legacy | 246 | Kraft, Lukas (1787) | Lost 1-2 | -141514 |
| top | average opponent: 1635record: 2-3 | new rating: 1514 | ||
| Grand Prix Paris 2011 (MBS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1079 | Sykko, Marko (1500) | Won 2-1 | +181518 |
| 2sealed | 1148 | Tanahashi, Masayasu (1841) | Won 2-0 | +241542 |
| 3sealed | 1070 | Lefevre, Thierry (1557) | Won 2-0 | +181560 |
| 4sealed | 1024 | Fortier, Laurent (1631) | Lost 0-2 | -171543 |
| 5sealed | 1142 | Jalaksa, Filip (1571) | Lost 0-2 | -171526 |
| 6sealed | 1191 | Perrier, Romain (1476) | Won 2-0 | +171543 |
| 7sealed | 1146 | Coline, Mickael (1481) | Lost 0-2 | -191524 |
| top | average opponent: 1580record: 4-3 | new rating: 1524 | ||