Marsch, Derek
Current rating: 1674
Record: 26-16
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1741 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 201 | Hemstedt, Daniel (1541) | Lost 0-2 | -221719 |
| 3modern | 282 | Stroup, Justin (1500) | Lost 0-2 | -221697 |
| 4modern | 446 | Gentillet, Jerome (1922) | Lost 1-2 | -141683 |
| 5modern | 572 | Diegel, Tom (1464) | Won 2-0 | +151698 |
| 6modern | 437 | Herren, Jason (1373) | Lost 0-2 | -241674 |
| top | average opponent: 1560record: 1-4 | new rating: 1674 | ||
| Grand Prix Indianapolis 2017 (HOU limited) | starting rating: 1740 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 290 | Carter, Dalton (1704) | Lost 1-2 | -191721 |
| 2sealed | 416 | Plicque, Joshua (1482) | Won 2-1 | +141735 |
| 3sealed | 341 | Hamrick, Samuel (1499) | Won 2-1 | +141749 |
| 4sealed | 235 | Loeffler, Darren (1510) | Won 2-1 | +131762 |
| 5sealed | 111 | Brown, Dylan [USA] (1670) | Won 2-0 | +171779 |
| 6sealed | 95 | Anderson, Ben (1924) | Won 2-1 | +201799 |
| 7sealed | 86 | Schaefer, Charles (1573) | Lost 0-2 | -221777 |
| 8sealed | 95 | Huelsman, Stephen (1696) | Lost 1-2 | -191758 |
| 9sealed | 209 | Nguyen, Thien (1827) | Lost 0-2 | -171741 |
| top | average opponent: 1654record: 5-4 | new rating: 1741 | ||
| Grand Prix Denver 2017 (HOU standard) | starting rating: 1674 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 362 | Mahan, Melissa (1406) | Won 2-0 | +131687 |
| 2standard | 132 | Mitchell, Branson (1556) | Lost 1-2 | -201667 |
| 3standard | 337 | Hibbs, Brett (1513) | Lost 1-2 | -211646 |
| 4standard | 473 | Geary, Robert (1318) | Won 2-0 | +121658 |
| 5standard | 282 | Leaton, Stephen (1476) | Won 2-0 | +151673 |
| 6standard | 332 | Radcliffe, John (1509) | Won 2-1 | +151688 |
| 7standard | 194 | Ng, Brent (1537) | Won 2-1 | +151703 |
| 8standard | 149 | Goodell, Milo (1535) | Lost 1-2 | -211682 |
| 9standard | 171 | Morris, Gareth (1711) | Won 2-0 | +191701 |
| 10standard | 96 | Barnes, Jacob (1612) | Won 2-0 | +161717 |
| 11standard | 107 | Peters, Kyle (1923) | Won 2-1 | +221739 |
| 12standard | 49 | Wise, Steve (1765) | Lost 1-2 | -181721 |
| 13standard | 111 | Voss, Zach (1853) | Lost 0-2 | -151706 |
| 14standard | 116 | Peters, Stephen (1825) | Won 2-0 | +201726 |
| 15standard | 102 | Crowder, Justin (1505) | Won 2-0 | +141740 |
| top | average opponent: 1603record: 10-5 | new rating: 1740 | ||
| Grand Prix Omaha 2017 (AKH standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 136 | Gasior, Isaac (1537) | Won 2-0 | +191519 |
| 4standard | 33 | Peters, Erik (1708) | Lost 0-1 | -151504 |
| 5standard | 68 | Thompson, Richard (1388) | Won 2-0 | +161520 |
| 6standard | 50 | Sikkink Johnson, Matt (1804) | Lost 1-2 | -131507 |
| 7standard | 169 | Wyss, Rusty (1539) | Won 2-0 | +191526 |
| 8standard | 104 | Feaster, Andrew (1548) | Won 2-1 | +181544 |
| 9standard | 32 | Rekow, Michael (1790) | Won 2-1 | +221566 |
| 10standard | 34 | Koepke, Devin (1851) | Won 2-0 | +231589 |
| 11standard | 15 | Huang, Ray (1764) | Won 2-0 | +221611 |
| 12standard | 8 | Peters, Kyle (1926) | Won 2-0 | +231634 |
| 13standard | 8 | Tierney, Patrick (1995) | Won 2-0 | +241658 |
| 14standard | 2 | Dean, Paul (2073) | Lost 1-2 | -101648 |
| 15standard | 13 | Baumeister, Corey (2130) | Won 2-1 | +261674 |
| top | average opponent: 1773record: 10-3 | new rating: 1674 | ||