Zantema, Kobus
Current rating: 1574
Record: 40-36-2
| Grand Prix Amsterdam 2017 (AKH standard) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 202 | Klocker, Mario (1608) | Won 2-1 | +191576 |
| 2standard | 230 | Peitzmann, Tim (1517) | Lost 1-2 | -191557 |
| 3standard | 320 | Hendrickx, Tim (1563) | Won 2-0 | +181575 |
| 4standard | 215 | Blankevoort, Tijmen (1651) | Won 2-0 | +191594 |
| 5standard | 121 | Browne, Gideon (1579) | Lost 1-2 | -181576 |
| 6standard | 235 | Ayuub, Mohamud (1566) | Won 2-0 | +181594 |
| 7standard | 162 | Lukaszek, Mateusz (1577) | Lost 1-2 | -191575 |
| 8standard | 268 | Fontaine, Marc (1597) | Lost 1-2 | -171558 |
| 9standard | 271 | Redolfi, Federico (1441) | Won 2-1 | +161574 |
| top | average opponent: 1567record: 5-4 | new rating: 1574 | ||
| Grand Prix Brussels 2015 (BFZ standard) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 437 | Pizzoccheri, Stefano (1726) | Won 0-0 | +211575 |
| 3standard | 306 | Etcheverry, Francois (1475) | Lost 1-2 | -201555 |
| 4standard | 180 | Pancrazi, Roberto (1609) | Lost 0-2 | -171538 |
| 5standard | 641 | Leveque, Julien (1600) | Lost 1-2 | -171521 |
| 6standard | 653 | Reijke, Sjoerd (1507) | Won 2-0 | +181539 |
| 7standard | 534 | Pawlaczyk, Francois (1534) | Won 2-1 | +181557 |
| 8standard | 335 | Vidal, Victor (1497) | Lost 0-2 | -191538 |
| 9standard | 379 | Cevette, Michael (1609) | Won 2-1 | +191557 |
| top | average opponent: 1570record: 4-4 | new rating: 1557 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 420 | Ludemann, Yassin (1500) | Lost 1-2 | -181519 |
| 2sealed | 445 | Maciocha, Thomas (1342) | Won 2-0 | +151534 |
| 3sealed | 323 | Vanhaute, Stijn (1500) | Won 2-1 | +171551 |
| 4sealed | 414 | Schreurs, Jos (1764) | Lost 0-2 | -141537 |
| 5sealed | 464 | Rosdahl, Alexander (1491) | Won 2-1 | +171554 |
| 6sealed | 309 | Spanoudis, Xenofo (1518) | Lost 1-2 | -191535 |
| 7sealed | 298 | Jansen, Jaco (1550) | Won 2-1 | +191554 |
| top | average opponent: 1523record: 4-3 | new rating: 1554 | ||
| Grand Prix Paris 2015 (DTK standard) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 367 | Coutarel, Bastien (1534) | Lost 1-2 | -181522 |
| 2standard | 387 | Bettelhauser, Eike (1337) | Won 2-0 | +151537 |
| 3standard | 380 | Rocher, Benjamin (1500) | Won 2-0 | +171554 |
| 4standard | 292 | Rebagliati, Nicola (1814) | Lost 1-2 | -131541 |
| 5standard | 516 | Turko, Timothe (1502) | Lost 1-2 | -191522 |
| 6standard | 505 | Valenti, Romain (1473) | Lost 1-2 | -191503 |
| 7standard | 448 | Degioanni, Christophe (1483) | Draw 1-1 | 01503 |
| 8standard | 370 | Viel, Matthieu (1375) | Won 2-0 | +161519 |
| 9standard | 287 | Monteiro, Jorge (1561) | Won 2-0 | +181537 |
| top | average opponent: 1509record: 4-4-1 | new rating: 1537 | ||
| Grand Prix Utrecht 2014 (M15 standard) | starting rating: 1541 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 183 | Kenbeek, Wout (1620) | Lost 0-2 | -161525 |
| 3standard | 358 | Bohnstedt, Lutz (1539) | Won 2-1 | +181543 |
| 4standard | 326 | Steinkamp, Paul (1521) | Won 2-1 | +181561 |
| 5standard | 264 | Karlsson, Malthe (1512) | Lost 1-2 | -191542 |
| 6standard | 349 | Reijke, Sjoerd (1518) | Won 2-1 | +171559 |
| 7standard | 170 | Pison, Remi (1533) | Lost 0-2 | -181541 |
| 8standard | 238 | van den Elzen, Stef (1523) | Lost 0-2 | -191522 |
| 9standard | 309 | Bihn, Sascha (1521) | Won 2-1 | +181540 |
| top | average opponent: 1536record: 4-4 | new rating: 1540 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 185 | Till, John (1439) | Won 2-0 | +161569 |
| 4block | 483 | Berger, Maximilien (1653) | Won 2-0 | +201589 |
| 5block | 591 | Watson, Chloe (1519) | Won 2-0 | +171606 |
| 6block | 8 | Shanks, Greg (1581) | Won 2-0 | +171623 |
| 7block | 111 | Lawton, James (1577) | Lost 1-2 | -191604 |
| 8block | 43 | Brook, Lee (1557) | Lost 1-2 | -191585 |
| 9block | 24 | Wild, Jimmy (1555) | Won 2-1 | +181603 |
| 10block | 68 | Wright, Stuart (1877) | Lost 0-2 | -131590 |
| 11block | 70 | Orsini Jones, Matteo (1954) | Lost 1-2 | -121578 |
| 12block | 74 | Simpson, Louis (1534) | Lost 0-2 | -191559 |
| 13block | 70 | Ebinger, Alexander (1563) | Lost 0-2 | -181541 |
| top | average opponent: 1619record: 5-6 | new rating: 1541 | ||
| Grand Prix Antwerp 2013 (modern) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 248 | Verhulst, Johan (1694) | Won 2-0 | +201576 |
| 2modern | 249 | Zani, Gianluca (1488) | Lost 1-2 | -191557 |
| 3modern | 510 | Noelanders, Miel (1439) | Lost 1-2 | -201537 |
| 4modern | 698 | Vooys, Kurt (1486) | Won 2-0 | +171554 |
| 5modern | 520 | Ditudidi, Opaps (1492) | Won 2-0 | +161570 |
| 6modern | 448 | Boucek, Jaroslav (1816) | Lost 0-2 | -131557 |
| 7modern | 428 | Measures, Michael (1420) | Lost 1-2 | -211536 |
| 8modern | 431 | Huttenmoser, Max (1478) | Won 2-0 | +171553 |
| top | average opponent: 1539record: 4-4 | new rating: 1553 | ||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 659 | Tsorbatzidis, Vasilis (1488) | Won 2-1 | +171551 |
| 2legacy | 792 | Hermans, Myrddin (1666) | Lost 0-2 | -161535 |
| 3legacy | 751 | Santucci, Daniele (1502) | Won 2-1 | +181553 |
| 4legacy | 859 | Sterenberg, Marius (1518) | Lost 0-2 | -191534 |
| 5legacy | 939 | Kurpjuhn, Patrick (1504) | Won 2-1 | +181552 |
| 6legacy | 782 | Liger, Jeremy (1612) | Won 2-1 | +191571 |
| 7legacy | 781 | Olsson, Marcus (1601) | Lost 0-2 | -181553 |
| 8legacy | 780 | Corbari, Silvio (1500) | Won 2-0 | +171570 |
| 9legacy | 715 | Snijdewind, Ruben (1759) | Lost 1-2 | -141556 |
| top | average opponent: 1572record: 5-4 | new rating: 1556 | ||
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 206 | Ginter, Markus (1654) | Lost 0-2 | -151485 |
| 2sealed | 372 | Post, Uwe (1428) | Draw 1-1 | -11484 |
| 3sealed | 318 | Kanter, Lars (1493) | Lost 1-2 | -181466 |
| 4sealed | 368 | Seifert, Phillip (1460) | Won 2-0 | +181484 |
| 5sealed | 307 | Vrijhof, Jan (1484) | Won 2-1 | +181502 |
| 6sealed | 237 | Tiesler, Tobias (1506) | Won 2-1 | +181520 |
| 7sealed | 175 | Raeke, Thomas (1469) | Lost 1-2 | -191501 |
| 8sealed | 141 | Gaspard, Alexandre (1375) | Won 2-1 | +161517 |
| 9sealed | 96 | Matveeva, Anna (1493) | Won 2-1 | +171534 |
| top | average opponent: 1485record: 5-3-1 | new rating: 1534 | ||