Marks, John
Current rating: 1711 (#5864)
Record: 16-10-1 (GP) / 30-22-3 (professional)
| Grand Prix Philadelphia 2002 (ONS rochester) | starting rating: 1729 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 94 | Gauthier, Martin-Eric (1522) | Won 2-1 | +151744 |
| 3sealed | 87 | Riley, Erin (1501) | Draw 1-1 | -51739 |
| 4sealed | 88 | Bischoft, Al (1536) | Won 2-1 | +151754 |
| 5sealed | 48 | Bezrukov, Semion (1518) | Won 2-1 | +141768 |
| 6sealed | 23 | Wise, Gary (1928) | Lost 0-2 | -161752 |
| 7sealed | 52 | Kirk, Kevin (1555) | Lost 0-2 | -211731 |
| 8sealed | 77 | Fischer, Adam (1607) | Lost 0-2 | -201711 |
| top | average opponent: 1595record: 3-3-1 | new rating: 1711 | ||
| Grand Prix Detroit 2001 (PLS limited) | starting rating: 1760 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 5 | Carpenter, Ryan (1571) | Lost 1-2 | -221738 |
| 4sealed | 104 | Rodemann, Dan (1501) | Won 2-1 | +141752 |
| 5sealed | 75 | Wee, Olwen (1485) | Lost 0-2 | -231729 |
| top | average opponent: 1519record: 1-2 | new rating: 1729 | ||
| Grand Prix New Orleans 2001 (INV limited) | starting rating: 1793 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 64 | Clark, Aaron (1488) | Won 2-0 | +131806 |
| 4sealed | 9 | Hegstad, Brian (1497) | Lost 0-2 | -231783 |
| 5sealed | 98 | Sandridge, Nicholas (1519) | Lost 0-2 | -231760 |
| top | average opponent: 1502record: 1-2 | new rating: 1760 | ||
| Pro Tour New York 2000 Masters (extended) | starting rating: 1813 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 14 | Dougherty, Robert (1754) | Lost 0-0 | -201793 |
| top | record: 0-1 | new rating: 1793 | ||
| Pro Tour New York 2000 (Masques block) | starting rating: 1828 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 115 | Jorstedt, Mattias (1577) | Won 2-1 | +131841 |
| 2block | 59 | Turian, Michael (1751) | Won 2-0 | +171858 |
| 3block | 6 | Dobson, Tony (1719) | Lost 0-2 | -211837 |
| 4block | 59 | Slemr, Jakub (1816) | Won 2-1 | +181855 |
| 5block | 12 | Devenport, David (1689) | Lost 1-2 | -211834 |
| 6block | 57 | Pustilnik, Michael (1647) | Lost 1-2 | -211813 |
| top | average opponent: 1700record: 3-3 | new rating: 1813 | ||
| Grand Prix Philadelphia 2000 (extended) | starting rating: 1712 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 70 | Stark, Ben S (1569) | Won 0-0 | +161728 |
| 4extended | 21 | Ellis, Randy (1521) | Won 0-0 | +141742 |
| 5extended | 18 | Leiher, Peter (1823) | Lost 0-0 | -171725 |
| 6extended | 57 | Van Ostenbridge, Ron (1538) | Won 0-0 | +151740 |
| 7extended | 19 | Coppage, Thomas (1500) | Won 0-0 | +141754 |
| 8extended | 14 | Finkel, Jon (1879) | Won 0-0 | +201774 |
| 9extended | 10 | Jensen, William (1882) | Lost 0-0 | -161758 |
| 10extended | 17 | Stokinger, Andrew (1545) | Won 0-0 | +141772 |
| 11extended | 11 | McLean, Drew (1548) | Won 0-0 | +141786 |
| 12extended | 5 | Bernat, Michael (1625) | Won 0-0 | +151801 |
| 13extended | 5 | Joyce, Brian (1634) | Won 0-0 | +151816 |
| 14extended | 3 | Dougherty, Robert (1780) | Won 0-0 | +171833 |
| Qextended | Swan, Brad (1702) | Won 0-0 | +161849 | |
| Sextended | Fitch, Britt (1677) | Lost 0-0 | -211828 | |
| top | average opponent: 1659record: 11-3 | new rating: 1828 | ||
| Pro Tour Chicago 1999 (extended) | starting rating: 1641 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 122 | Canu, Franck (1630) | Lost 1-2 | -181623 |
| 2extended | 130 | LePine, Mark (1823) | Won 2-1 | +211644 |
| 3extended | 72 | Toikka, Seppo (1659) | Won 2-1 | +191663 |
| 4extended | 58 | Elarar, Jay (1519) | Lost 0-2 | -211642 |
| 5extended | 95 | Schmitz, Daniel (1501) | Won 2-1 | +151657 |
| 6extended | 46 | Campusano, Eric (1525) | Won 2-1 | +161673 |
| 7extended | 29 | Pustilnik, Michael (1745) | ID | 01673 |
| 8extended | 35 | Menard, Antoine (1761) | Draw 1-1 | +21675 |
| 9extended | 38 | Krakower, Gary (1766) | Won 2-0 | +191694 |
| 10extended | 30 | Bingen, Sturla (1670) | Won 2-1 | +181712 |
| 11extended | 20 | Romero, Ellis (1654) | Won 2-0 | +171729 |
| 12extended | 13 | Lefranc, Florent (1609) | Lost 1-2 | -201709 |
| 13extended | 20 | Herms, Roc (1818) | Won 2-1 | +201729 |
| 14extended | 15 | Fuller, Ryan (1809) | Lost 0-2 | -171712 |
| top | average opponent: 1678record: 8-4-2 | new rating: 1712 | ||
| 1999 World Championship (mixed) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 7 | Ho, Chih-Cheng (1500) | Won 0-0 | +181517 |
| 2standard | 43 | Kuhn, Janosch (1706) | Won 0-0 | +221539 |
| 3standard | 7 | Ishida, Itaru (1547) | Won 0-0 | +181557 |
| 4standard | 7 | Arreola, Saul (1554) | Won 0-0 | +181575 |
| 5standard | 4 | Linde, Matt (1582) | Lost 1-2 | -181557 |
| 6standard | 10 | Lauer, Erik (1802) | Won 0-0 | +221579 |
| 7rochester | 3 | Price, David (1667) | Won 0-0 | +201599 |
| 8rochester | 2 | Geertsen, Svend (1943) | Lost 0-0 | -121587 |
| 9rochester | 8 | Rose, Kyle (1736) | Lost 0-0 | -151572 |
| 10rochester | 24 | Buehler, Randy (1813) | Won 0-0 | +221594 |
| 11rochester | 84 | Menard, Antoine (1601) | Draw 0-0 | 01594 |
| 12rochester | 80 | Curto Vives, Xavi (1570) | Won 0-0 | +181612 |
| 13extended | 6 | Geertsen, Svend (1939) | Lost 0-0 | -131599 |
| 14extended | 14 | Fujita, Kenichi (1624) | Won 0-0 | +191618 |
| 15extended | 9 | Eskeland, Sigurd (1768) | Won 0-0 | +201638 |
| 16extended | 7 | Menard, Antoine (1640) | Draw 0-0 | 01638 |
| 17extended | 8 | Krumick, Shannon (1598) | Won 0-0 | +181656 |
| 18extended | 5 | Herzog, Nicolai (1833) | Lost 0-0 | -151641 |
| top | average opponent: 1690record: 11-5-2 | new rating: 1641 | ||
| Pro Tour New York 1999 (Urza's block) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 20 | Parke, Jamie (1574) | Lost 1-2 | -161494 |
| 2block | 102 | Guevin, Peter (1483) | Won 2-0 | +171511 |
| 3block | 79 | Papp, Gabor (1608) | Lost 1-2 | -161495 |
| 4block | 87 | Duffy, Shane (1488) | Won 2-0 | +181513 |
| 5block | 54 | Pikula, Chris (1741) | Lost 1-2 | -141499 |
| top | average opponent: 1579record: 2-3 | new rating: 1499 | ||
| Pro Tour Los Angeles 1999 (USG rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1rochester | 63 | Cassina, Tiziano (1500) | Won 0-0 | +181518 |
| 2rochester | 137 | Smrek, Juraj (1617) | Lost 0-2 | -161502 |
| 3rochester | 64 | Haigh, Julian (1504) | Won 2-0 | +181520 |
| 4rochester | 85 | Rose, Kyle (1736) | Won 2-0 | +221542 |
| 5rochester | 13 | Hacker, Brian (1727) | Lost 0-2 | -151527 |
| 6rochester | 60 | Kaiser, Jens (1542) | Won 0-0 | +181545 |
| 7rochester | 14 | Tsai, Tony (1571) | ID | 01545 |
| 8rochester | 21 | Gurney, Michael (1541) | Lost 0-0 | -181527 |
| 9rochester | 15 | Varrone, Massimo (1519) | Won 2-1 | +181545 |
| 10rochester | 36 | Luhrs, Christian (1539) | Lost 0-2 | -181527 |
| 12rochester | 14 | Hubble, Bryan (1532) | Lost 0-2 | -181509 |
| 13rochester | 38 | Maher, Bob (1558) | Won 2-1 | +191528 |
| 14rochester | 32 | Hiltunen, Arto (1552) | Lost 0-2 | -181510 |
| top | average opponent: 1572record: 6-6-1 | new rating: 1510 | ||