Koperberg, Twan
Current rating: 1643
Record: 64-46-2
Grand Prix Brussels 2008Grand Prix Paris 2008Grand Prix Hanover 2009Grand Prix Prague 2009Grand Prix Paris 2009Grand Prix Madrid 2010Grand Prix Brussels 2010Grand Prix Bochum 2010Grand Prix Paris 2011Grand Prix Amsterdam 2011Grand Prix Lille 2012Grand Prix Ghent 2012Grand Prix Antwerp 2013Grand Prix Utrecht 2015
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1598 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2143 | Pavlov, Yassen (1544) | Won 2-1 | +171615 |
| 2sealed | 2151 | Frerichs, Jurgen (1607) | Won 2-0 | +181633 |
| 3sealed | 2120 | Sormani, Reto (1722) | Lost 1-2 | -161617 |
| 4sealed | 2217 | Simon, Assaf (1431) | Won 2-1 | +141631 |
| 5sealed | 2112 | Valcke, Michiel (1499) | Draw 1-1 | -21629 |
| 6sealed | 2130 | Roberti, Tijmen (1530) | Won 2-0 | +161645 |
| 7sealed | 2075 | Tiller-Collins, Liam (1550) | Won 2-0 | +171662 |
| 8sealed | 2046 | Fegert, Klaus (1641) | Lost 0-2 | -191643 |
| top | average opponent: 1566record: 5-2-1 | new rating: 1643 | ||
| Grand Prix Antwerp 2013 (modern) | starting rating: 1595 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 97 | Muller, Sven (1465) | Lost 0-2 | -211574 |
| 2modern | 502 | Costa, Filipe (1579) | Lost 0-2 | -181556 |
| 3modern | 721 | Schofield, Robert (1371) | Won 2-1 | +151571 |
| 4modern | 633 | Bernhardsen, Christoffer (1504) | Lost 1-2 | -191552 |
| 5modern | 675 | Kenbeek, Wout (1624) | Won 2-0 | +191571 |
| 6modern | 517 | Weller, Lars (1431) | Won 2-0 | +161587 |
| 7modern | 431 | Danielsen, Brian (1526) | Won 2-0 | +171604 |
| 8modern | 334 | Allen, Tim (1427) | Won 2-0 | +141618 |
| 9modern | 212 | Isendam, Rainier (1509) | Lost 0-2 | -201598 |
| top | average opponent: 1493record: 5-4 | new rating: 1598 | ||
| Grand Prix Ghent 2012 (legacy) | starting rating: 1607 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 618 | van Wonterghem, Frederic (1518) | Won 2-0 | +161623 |
| 3legacy | 614 | Kesseler, Marco (1648) | Lost 1-2 | -171606 |
| 4legacy | 806 | Partridge, John (1520) | Won 2-1 | +161622 |
| 5legacy | 694 | Zhang, Siyuan (1503) | Won 2-1 | +161638 |
| 6legacy | 631 | Teppa, Michaele (1516) | Lost 1-2 | -201618 |
| 7legacy | 713 | Geurts, Steven (1552) | Lost 1-2 | -191599 |
| 8legacy | 747 | Ahlberg, Daniel (1428) | Won 2-0 | +151614 |
| 9legacy | 696 | Solis, Joaquin (1567) | Lost 1-2 | -191595 |
| top | average opponent: 1531record: 4-4 | new rating: 1595 | ||
| Grand Prix Lille 2012 (DKA standard) | starting rating: 1654 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 656 | Lete, Didier (1500) | Lost 1-2 | -211633 |
| 2standard | 723 | Buisson, Anthony (1461) | Won 2-0 | +151648 |
| 3standard | 644 | Marais, Damien (1499) | Lost 1-2 | -201628 |
| 5standard | 741 | Grasset, Jean-Baptiste (1485) | Lost 0-2 | -211607 |
| top | average opponent: 1486record: 1-3 | new rating: 1607 | ||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1656 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 205 | Carnicer, Javier (1517) | Lost 1-2 | -211635 |
| 2legacy | 283 | Ramnarain, Sandjai (1484) | Lost 1-2 | -211614 |
| 3legacy | 342 | Klomp, Michael (1463) | Won 2-0 | +161630 |
| 4legacy | 385 | Grega, Posinek (1465) | Won 2-1 | +151645 |
| 5legacy | 275 | Seegers, Sebastiaan (1501) | Won 2-1 | +151660 |
| 6legacy | 178 | Craven, Christopher (1470) | Won 2-1 | +151675 |
| 7legacy | 129 | Smellink, Dirk (1535) | Lost 1-2 | -211654 |
| top | average opponent: 1491record: 4-3 | new rating: 1654 | ||
| Grand Prix Paris 2011 (MBS limited) | starting rating: 1671 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 626 | Colmagro, Fabrice (1446) | Lost 0-2 | -221649 |
| 2sealed | 683 | Bailly, Olivier (1501) | Won 2-1 | +151664 |
| 3sealed | 722 | Lamberto, Damien (1492) | Won 2-0 | +151679 |
| 4sealed | 699 | Andreasson, Bjorn (1541) | Lost 1-2 | -211658 |
| 5sealed | 735 | Latyshev, Peter V (1497) | Won 2-1 | +151673 |
| 6sealed | 698 | Panara, Bruno (1688) | Lost 1-2 | -171656 |
| top | average opponent: 1528record: 3-3 | new rating: 1656 | ||
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1721 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 676 | Pedersen, Christoffer (1518) | Won 2-0 | +141735 |
| 3sealed | 545 | Jansen, Ralf (1550) | Lost 1-2 | -211714 |
| 4sealed | 653 | Matull, Milan (1521) | Lost 1-2 | -221692 |
| 5sealed | 786 | Vansteelandt, Maarten (1484) | Lost 1-2 | -211671 |
| top | average opponent: 1518record: 1-3 | new rating: 1671 | ||
| Grand Prix Brussels 2010 (WWK standard) | starting rating: 1738 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 166 | Sajgalik, Eduardo (1665) | Won 2-1 | +171755 |
| 3standard | 42 | Dolmatov, Dmitry (1603) | Won 2-0 | +151770 |
| 4standard | 44 | Rosner, Rene (1499) | Won 2-1 | +131783 |
| 5standard | 9 | Massicard, Yann (1781) | Lost 1-2 | -181765 |
| 6standard | 97 | Chailloux, Andre (1545) | Lost 1-2 | -221743 |
| 7standard | 147 | Stanic, Bojan (1488) | Lost 0-2 | -221721 |
| top | average opponent: 1597record: 3-3 | new rating: 1721 | ||
| Grand Prix Madrid 2010 (legacy) | starting rating: 1736 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 954 | Wichlacz, Zbigniew (1657) | Won 2-1 | +171753 |
| 3legacy | 805 | Ohlhof, Frank (1730) | Won 2-1 | +171770 |
| 4legacy | 741 | Baauw, Dennis (1555) | Won 2-1 | +151785 |
| 5legacy | 758 | Labat Beltran, Andres (1542) | Lost 0-2 | -231762 |
| 6legacy | 833 | Varela, Daniel (1552) | Won 2-0 | +141776 |
| 7legacy | 759 | Sanchez, Eugeni (1864) | Lost 1-2 | -161760 |
| 8legacy | 815 | Scalchi, Massimo (1503) | Won 2-1 | +131773 |
| 9legacy | 786 | Garcia Paez, Daniel (1557) | Won 2-1 | +151788 |
| 10legacy | 73 | Pascual, Ivan (1534) | Lost 1-2 | -231765 |
| 11legacy | 110 | Rosinski, Dennis (1552) | Won 2-0 | +141779 |
| 12legacy | 85 | Carbonero Sanz, Anibal (1547) | Lost 0-2 | -221757 |
| 13legacy | 93 | Black, Samuel (1716) | Lost 0-2 | -191738 |
| top | average opponent: 1609record: 7-5 | new rating: 1738 | ||
| Grand Prix Paris 2009 (ZEN limited) | starting rating: 1612 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 262 | Pataluch, Grzegorz (1500) | Won 2-1 | +161628 |
| 2sealed | 104 | Verovski, Serge (1560) | Won 2-0 | +171645 |
| 3sealed | 65 | Hartmann, Caroline (1536) | Won 2-0 | +161661 |
| 4sealed | 45 | van Reijmersdal, Niels (1503) | Won 2-0 | +151676 |
| 5sealed | 49 | Cazenave, Julien (1624) | Won 2-0 | +171693 |
| 6sealed | 9 | Brice Bcps Team, Af (1538) | Lost 1-2 | -201673 |
| 7sealed | 31 | Georg, Pierre-antoine (1574) | Won 2-0 | +161689 |
| 8sealed | 15 | Baudois, Guillaume (1552) | Won 2-0 | +151704 |
| 9sealed | 18 | Bjornerud, Sveinung (1677) | Lost 1-2 | -181686 |
| 10sealed | 47 | Pichon, Elie (1648) | Won 2-1 | +171703 |
| 11draft | 6 | Bellamy, Gregory (1615) | Won 2-0 | +171720 |
| 12draft | 112 | Vial, Loic (1632) | Lost 0-2 | -201700 |
| 13draft | 49 | Hild, Greg (1716) | Won 2-1 | +181718 |
| 14draft | 38 | Lespinas, Didier (1709) | Lost 1-2 | -181700 |
| 15draft | 98 | Costa, Frederico (1787) | Won 2-1 | +201720 |
| 16draft | 43 | Zani, Gianluca (1645) | Won 2-0 | +161736 |
| top | average opponent: 1614record: 12-4 | new rating: 1736 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1621 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 549 | Staude, Marek (1536) | Lost 1-2 | -201601 |
| 4sealed | 702 | Silfver, Ahti (1546) | Draw 1-1 | -11600 |
| 5sealed | 675 | Huke, Lothar (1525) | Won 2-1 | +171617 |
| 6sealed | 610 | Gallus, Andrej (1637) | Lost 0-2 | -181599 |
| 7sealed | 668 | Hertig, Lionell (1490) | Won 2-1 | +161615 |
| 8sealed | 620 | Reder, Hrvoje (1540) | Won 2-0 | +171632 |
| 9sealed | 579 | Weidemann, Felix (1559) | Lost 0-2 | -201612 |
| top | average opponent: 1548record: 3-3-1 | new rating: 1612 | ||
| Grand Prix Hanover 2009 (extended) | starting rating: 1587 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 85 | Ulatowski, Przemyslaw (1553) | Won 2-0 | +171604 |
| 2extended | 1 | Melichar, Martin (1649) | Won 2-0 | +191623 |
| 3extended | 56 | Grund, Daniel (1577) | Lost 0-2 | -191604 |
| 4extended | 136 | Nolting, Florian (1518) | Won 0-0 | +171621 |
| 5extended | 57 | Huke, Lothar (1535) | Won 2-0 | +161637 |
| 6extended | 46 | Cammilluzzi, Marco (1686) | Won 2-1 | +191656 |
| 7extended | 13 | Thomsen, Sascha (1763) | Lost 1-2 | -161640 |
| 8extended | 59 | Piatkowski, Dominik (1571) | Lost 0-2 | -191621 |
| top | average opponent: 1607record: 5-3 | new rating: 1621 | ||
| Grand Prix Paris 2008 (ALA limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 210 | Antoine, Remi (1500) | Won 2-0 | +181557 |
| 2sealed | 165 | Ameeuw, Sebastien (1478) | Won 2-1 | +161573 |
| 3sealed | 20 | Soulet, Hugo (1535) | Lost 0-2 | -181555 |
| 4sealed | 174 | Assie, Amelie (1539) | Won 2-1 | +171572 |
| 5sealed | 62 | Lewandowski, Mathias (1576) | Won 2-1 | +181590 |
| 6sealed | 84 | Mercier, Lionel (1551) | Lost 0-2 | -181572 |
| 7sealed | 127 | Vizzari, Paolo (1524) | Won 2-0 | +171589 |
| 8sealed | 81 | Morrison, Andrew (1444) | Lost 0-2 | -211568 |
| 9sealed | 98 | Nolte, Dennis (1606) | Won 2-1 | +191587 |
| top | average opponent: 1528record: 6-3 | new rating: 1587 | ||
| Grand Prix Brussels 2008 (SHM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 95 | Billiau, Michel (1471) | Won 2-0 | +171517 |
| 2sealed | 151 | Serbruyns, Joachim (1499) | Lost 1-2 | -181499 |
| 3sealed | 174 | Guyard, Rodolphe (1555) | Won 2-1 | +191518 |
| 4sealed | 164 | Strzalka, Alexandre (1518) | Won 2-1 | +181536 |
| 5sealed | 76 | Leroy, Quentin (1642) | Won 2-1 | +201556 |
| 6sealed | 55 | Seibold, Christian (1669) | Lost 1-2 | -161540 |
| 7sealed | 130 | Guez, Oren (1541) | Won 0-0 | +181558 |
| 8sealed | 91 | Holle, Niels (1519) | Lost 1-2 | -191539 |
| top | average opponent: 1552record: 5-3 | new rating: 1539 | ||