Henderson, Mark
Current rating: 1511
Record: 13-14
| Grand Prix Minneapolis 2019 (modern) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 67 | Snyder, Joshua (1574) | Won 2-1 | +191541 |
| 2modern | 20 | Loiland, Stephanie (1547) | Won 2-0 | +181559 |
| 3modern | 135 | Zachow, Andrew (1694) | Lost 0-2 | -161543 |
| 4modern | 160 | Weihe, Sean (1735) | Lost 1-2 | -141529 |
| 5modern | 262 | Penticoff, Aidan (1526) | Lost 1-2 | -181511 |
| top | average opponent: 1615record: 2-3 | new rating: 1511 | ||
| Grand Prix Minneapolis 2018 (M19 limited) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 269 | Ludwigson, Matthew (1465) | Won 2-0 | +171507 |
| 2sealed | 11 | Ryan, Colin (1506) | Won 2-0 | +181525 |
| 3sealed | 5 | Luong, Marcus (1832) | Lost 0-2 | -121513 |
| 4sealed | 286 | Takahashi, Yuta (2067) | Won 2-0 | +271540 |
| 5sealed | 232 | Lam, David (1460) | Lost 0-2 | -201520 |
| 6sealed | 230 | Emerson, Darrin (1513) | Won 2-0 | +181538 |
| 7sealed | 145 | Dove, Michael (1626) | Lost 1-2 | -161522 |
| top | average opponent: 1638record: 4-3 | new rating: 1522 | ||
| Grand Prix Minneapolis 2017 (HOU standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 201 | Medley, Jacob (1663) | Won 2-0 | +221486 |
| 2standard | 257 | Felling, Darren (1570) | Lost 0-2 | -171469 |
| 3standard | 414 | Heggen, Joshua (1463) | Won 2-0 | +181487 |
| 4standard | 183 | Thompson, George (1504) | Lost 1-2 | -181469 |
| 5standard | 318 | Bohling, Austin (1503) | Won 2-0 | +191488 |
| 6standard | 162 | Frankiewicz, James (1520) | Won 2-0 | +191507 |
| 7standard | 183 | Sundbo, Erik (1543) | Lost 1-2 | -181489 |
| 8standard | 261 | Schleusener, William (1474) | Won 2-0 | +181507 |
| 9standard | 163 | Topham, Tristan (1541) | Lost 0-2 | -171490 |
| top | average opponent: 1531record: 5-4 | new rating: 1490 | ||
| Grand Prix Minneapolis 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 113 | Corbo, Quade (1505) | Lost 0-2 | -181482 |
| 2standard | 597 | Hadjian, Arman (1485) | Won 2-0 | +181500 |
| 3standard | 564 | Haider, Michael (1500) | Lost 0-2 | -181482 |
| 4standard | 643 | Nicoletti, Jonathan (1488) | Lost 1-2 | -181464 |
| 5standard | 624 | DiSalvo, Adam (1464) | Won 2-0 | +181482 |
| 6standard | 506 | Yee-Fong, Paul (1479) | Lost 0-2 | -181464 |
| top | average opponent: 1487record: 2-4 | new rating: 1464 | ||