Roos, Maarten
Current rating: 1484
Record: 40-41-3
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 891 | Clark, William C (1500) | Won 2-0 | +191495 |
| 2legacy | 713 | Patarca, Humberto (1553) | Lost 1-2 | -171478 |
| 3legacy | 867 | Brandenburg, Michael (1501) | Lost 0-2 | -181460 |
| 4legacy | 909 | Woutersen, Erik (1482) | Won 2-0 | +191479 |
| 5legacy | 879 | Tornros, Mats (1707) | Won 2-0 | +221501 |
| 6legacy | 853 | Huttenhain, Jesko (1570) | Lost 0-2 | -171484 |
| 7legacy | 869 | Ferguson, Robert (1520) | Won 2-1 | +191503 |
| 8legacy | 762 | Hendriks, Thomas (1470) | Lost 0-2 | -191484 |
| top | average opponent: 1538record: 4-4 | new rating: 1484 | ||
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1597 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 592 | Wevers, Jasper D (1500) | Lost 0-2 | -201577 |
| 2sealed | 660 | Vos, Marnix (1482) | Lost 0-2 | -201557 |
| 3sealed | 662 | Duchesne, Koen (1463) | Lost 0-2 | -201537 |
| 4sealed | 679 | Ewijk, Gerard (1385) | Lost 0-2 | -201517 |
| 6sealed | 603 | Wong, Man Hin (1449) | Won 2-0 | +161533 |
| 7sealed | 565 | Sas, Ivar (1461) | Lost 0-2 | -191514 |
| 8sealed | 528 | Kruit, Bertram (1467) | Lost 1-2 | -191495 |
| 9sealed | 502 | Durr-frederiksen, Kenneth (1446) | Lost 1-2 | -191476 |
| top | average opponent: 1457record: 1-7 | new rating: 1476 | ||
| Grand Prix Vienna 2004 (COK limited) | starting rating: 1607 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 90 | Kapor, Milos (1518) | Won 2-0 | +171624 |
| 3sealed | 132 | Durham, Michael (1687) | Won 2-1 | +191643 |
| 4sealed | 31 | Sedler, Helge (1438) | Won 2-1 | +141657 |
| 5sealed | 7 | Leitzinger, Gerald (1534) | Lost 0-2 | -201637 |
| 6sealed | 42 | Schechtl, Leonard (1575) | Lost 0-2 | -191618 |
| 7sealed | 123 | Lapcevic, Bosko (1540) | Lost 0-2 | -201598 |
| 8sealed | 149 | Krastev, Vladimir (1519) | Lost 1-2 | -191579 |
| 9sealed | 156 | Vondracek, Zdenek (1562) | Won 2-0 | +181597 |
| top | average opponent: 1547record: 4-4 | new rating: 1597 | ||
| Grand Prix Seville 2003 (LGN limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 14 | Sanchez Toro, Francisco Javier (1560) | Won 2-0 | +191540 |
| 2sealed | 155 | Castro, Simao (1559) | Won 2-0 | +181558 |
| 3sealed | 82 | Morata Sierra, Javier (1572) | Won 2-0 | +191577 |
| 4sealed | 59 | Jimenez Ponce, Pablo (1523) | Won 2-0 | +171594 |
| 5sealed | 27 | Blazquez, David (1583) | Lost 0-2 | -191575 |
| 6sealed | 81 | Baberowski, Dirk (2024) | Lost 1-2 | -101565 |
| 7sealed | 116 | Hernandez, Richard (1566) | Won 2-1 | +181583 |
| 8sealed | 49 | Larkin, John (1925) | Won 2-1 | +241607 |
| top | average opponent: 1664record: 6-2 | new rating: 1607 | ||
| Grand Prix Copenhagen 2002 (ONS rochester) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 121 | Pedan, Sergey (1480) | Won 2-0 | +181502 |
| 2sealed | 24 | Reinderman, Dimitri (1489) | Lost 1-2 | -181484 |
| 3sealed | 106 | Dubber, Wilhelm (1527) | Lost 1-2 | -181466 |
| 4sealed | 177 | Schutte, Soren (1483) | Won 2-0 | +191485 |
| 5sealed | 160 | Dang, Martin (1408) | Lost 1-2 | -201465 |
| 6sealed | 149 | Puumalainen, Miika (1502) | Won 2-0 | +191484 |
| 7sealed | 119 | Sagebiel, Kalle (1515) | Won 2-0 | +191503 |
| 8sealed | 82 | Gruss, Andreas (1547) | Won 2-1 | +181521 |
| top | average opponent: 1494record: 5-3 | new rating: 1521 | ||
| Grand Prix Antwerp 2002 (TOR limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 122 | Oostveen, Arno (1500) | Lost 0-2 | -181462 |
| 2sealed | 256 | Rensonnet, Pierre (1484) | Lost 1-2 | -171445 |
| 3sealed | 241 | Montagne, Francois (1464) | Won 2-1 | +181463 |
| 4sealed | 246 | Gauthier, Sebastien (1533) | Won 2-1 | +191482 |
| 5sealed | 168 | Heistermann, Dirk (1499) | Won 2-1 | +191501 |
| 6sealed | 92 | Pouwels, Jeroen (1538) | Won 2-0 | +181519 |
| 7sealed | 92 | Steinbock, Kai (1536) | Lost 0-2 | -171502 |
| 8sealed | 92 | Steurs, Stephane (1518) | Lost 1-2 | -181484 |
| top | average opponent: 1509record: 4-4 | new rating: 1484 | ||
| Grand Prix Heidelberg 2002 (TOR limited) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 81 | Schmidt, Thomas (1500) | Lost 1-2 | -191500 |
| 2sealed | 288 | Matheis, Dennis (1482) | Draw 1-1 | 01500 |
| 3sealed | 333 | Borys, Grzegorz (1489) | Lost 0-2 | -181482 |
| 4sealed | 362 | Schnur, Constantin (1465) | Lost 1-2 | -191463 |
| 5sealed | 322 | Heyvang, Cyrielle (1428) | Won 2-0 | +181481 |
| 6sealed | 261 | Rodriguez Boy, Francisco Jos (1463) | Won 2-1 | +171498 |
| 7sealed | 190 | Pick, Tobias (1481) | Draw 1-1 | 01498 |
| 8sealed | 162 | Ribbeck, Benjamin (1484) | Lost 1-2 | -181480 |
| top | average opponent: 1474record: 2-4-2 | new rating: 1480 | ||
| Grand Prix London 2001 (Invasion block) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 150 | Clayton, Andrew P. (1500) | Won 2-0 | +181536 |
| 2block | 42 | Curtis, Andrew (1518) | Won 2-0 | +181554 |
| 3block | 5 | Doise, Jan (1667) | Won 2-1 | +201574 |
| 4block | 41 | Warmenhoven, Ruud (1565) | Lost 1-2 | -181556 |
| 5block | 85 | Hows, Tim (1520) | Lost 1-2 | -191537 |
| 6block | 129 | Vaglin, Mattias (1521) | Lost 0-2 | -181519 |
| top | average opponent: 1548record: 3-3 | new rating: 1519 | ||
| Grand Prix Cologne 2001 (PLS limited) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 49 | Ophalvens, Serge (1503) | Lost 0-2 | -191503 |
| 2sealed | 162 | Hoffmann, Jorg (1482) | Lost 1-2 | -181485 |
| 3sealed | 218 | Trevisang, Torsten (1464) | Won 2-0 | +171502 |
| 4sealed | 206 | Schaefer, Marius (1484) | Lost 1-2 | -181484 |
| 5sealed | 211 | Funk, Nico (1465) | Won 2-0 | +181502 |
| 6sealed | 182 | Loublier, Michael (1436) | Won 2-1 | +171519 |
| 7sealed | 145 | Westra, Remco (1490) | Lost 0-2 | -191500 |
| 8sealed | 130 | Oestergaard, Joan (1518) | Won 2-1 | +181518 |
| top | average opponent: 1480record: 4-4 | new rating: 1518 | ||
| Grand Prix Amsterdam 2001 (INV limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 201 | Kooistra, Frederik (1500) | Lost 0-2 | -171466 |
| 2sealed | 248 | Vos, J.j. (1482) | Won 2-0 | +181484 |
| 3sealed | 194 | Kerjean, Emmanuel (1500) | Won 2-0 | +181502 |
| 4sealed | 150 | Foket, Kurt (1514) | Lost 0-2 | -171485 |
| 5sealed | 155 | Demals, Aurelien (1498) | Won 2-1 | +181503 |
| 6sealed | 112 | Meyer, Rudy (1520) | Won 2-1 | +181521 |
| 7sealed | 75 | van den Hanenberg, Frank (1503) | Lost 1-2 | -181503 |
| 8sealed | 122 | Aguado, Saul (1542) | Won 2-1 | +191522 |
| top | average opponent: 1507record: 5-3 | new rating: 1522 | ||
| Grand Prix Manchester 2000 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Kennerley, Simon (1500) | Draw 1-1 | 01500 |
| 2sealed | 63 | Bleasdale, John (1500) | Lost 1-2 | -181482 |
| 3sealed | 92 | Lais, Harald (1518) | Lost 0-2 | -171465 |
| 4sealed | 112 | Fiedler, Henning (1495) | Lost 0-2 | -181447 |
| 6sealed | 91 | Robertson, Val (1464) | Won 2-1 | +191466 |
| 7sealed | 79 | Ansell, Carl (1463) | Won 2-1 | +171483 |
| top | average opponent: 1490record: 2-3-1 | new rating: 1483 | ||