Catterall-Davis, Merlin
Current rating: 1606
Record: 30-25
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 117 | Himlie, Cameron (1500) | Won 2-0 | +181545 |
| 2sealed | 189 | Wong, Harry (1518) | Lost 0-2 | -191526 |
| 3sealed | 304 | Popick, Joel (1680) | Won 2-1 | +211547 |
| 4sealed | 199 | Hayes, Sean (1493) | Won 2-0 | +171564 |
| 5sealed | 134 | Jefferson, Kyle (1642) | Won 2-0 | +191583 |
| 6sealed | 131 | Mach, Frankie (1550) | Won 2-1 | +181601 |
| 7sealed | 101 | Flachsbart, Jesse (1581) | Won 2-0 | +171618 |
| 8sealed | 27 | Wheeler, Tyrell (1628) | Won 2-0 | +181636 |
| 9sealed | 8 | Ward, Matthew (1649) | Won 2-1 | +191655 |
| 10sealed | 12 | Ruskey, Albert (1734) | Lost 0-2 | -171638 |
| 11draft | 48 | Neal, Stephen (1731) | Won 2-0 | +201658 |
| 12draft | 72 | Edelson, Steve (1696) | Lost 1-2 | -171641 |
| 13draft | 8 | Shears, Brett (1764) | Lost 1-2 | -161625 |
| 14draft | 12 | Flones, Jason E (1584) | Lost 0-2 | -191606 |
| top | average opponent: 1625record: 9-5 | new rating: 1606 | ||
| Grand Prix Oakland 2010 (extended) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 30 | Sison, Nomer Conrad (1608) | Lost 1-2 | -171554 |
| 3extended | 254 | Facca, Leo (1405) | Lost 0-2 | -211533 |
| 4extended | 291 | Arce, Aaron (1434) | Won 2-0 | +171550 |
| 5extended | 277 | Morgan, Todd W (1469) | Lost 0-2 | -201530 |
| 6extended | 265 | Calderon, Alejandro (1482) | Lost 0-2 | -191511 |
| 7extended | 222 | Yoo, Ki-hyun (1479) | Won 2-0 | +181529 |
| 8extended | 162 | Hack, Jimmy (1480) | Won 2-0 | +171546 |
| 9extended | 116 | Gillam, Tim (1504) | Lost 0-2 | -191527 |
| top | average opponent: 1483record: 3-5 | new rating: 1527 | ||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 56 | Sidher, Ricky (1640) | Won 2-1 | +201587 |
| 3standard | 168 | Treviranus, John (1522) | Won 2-0 | +171604 |
| 4standard | 40 | Parke, Jamie (1999) | Lost 1-2 | -121592 |
| 5standard | 119 | Faraj, Namir (1540) | Won 2-1 | +171609 |
| 6standard | 108 | St. Arnauld, Dwayne (1551) | Lost 0-2 | -191590 |
| 7standard | 119 | Young, Nick w (1537) | Lost 1-2 | -191571 |
| top | average opponent: 1631record: 3-3 | new rating: 1571 | ||
| Grand Prix Los Angeles 2009 (extended) | starting rating: 1609 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 22 | Umamoto, Derek (1575) | Won 2-1 | +171626 |
| 5extended | 38 | Ruiz, Joey (1485) | Won 2-1 | +151641 |
| 6extended | 23 | Yang, Louis (1575) | Won 2-1 | +171658 |
| 7extended | 4 | Sperling, Matthew (1684) | Won 2-0 | +191677 |
| 8extended | 4 | Stanley, Justin N (1594) | Lost 1-2 | -201657 |
| 9extended | 13 | Contos, Jace D (1743) | Won 2-1 | +201677 |
| 10extended | 4 | Hague, Matt (1579) | Lost 1-2 | -201657 |
| 11extended | 12 | Unger, Max (1570) | Lost 0-2 | -201637 |
| 12extended | 30 | Gray, Andrew (1553) | Lost 1-2 | -191618 |
| 13extended | 43 | Wyant, Aaron (1630) | Lost 1-2 | -181600 |
| 14extended | 53 | Shapiro, Jeremy (1790) | Lost 1-2 | -151585 |
| 15extended | 51 | Siow, Lucas (1585) | Lost 0-2 | -181567 |
| top | average opponent: 1614record: 5-7 | new rating: 1567 | ||
| Grand Prix San Francisco 2007 (Time Spiral block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 31 | Dembenski, Eugene (1500) | Won 2-1 | +181518 |
| 2block | 7 | Campusano, Eric (1510) | Won 2-1 | +181536 |
| 3block | 125 | Rahamim, Avri (1462) | Won 2-1 | +171553 |
| 4block | 76 | Dalton, Trevor L (1504) | Won 2-1 | +171570 |
| 5block | 7 | Sims, David (1519) | Won 2-1 | +171587 |
| 6block | 15 | Stocks, Jonathan (1651) | Lost 0-2 | -171570 |
| 7block | 46 | Summersberger, Helmut (1915) | Won 2-1 | +241594 |
| 8block | 18 | Ruel, Olivier (2162) | Lost 0-2 | -91585 |
| 9block | 54 | Eck, Kyle (1571) | Won 0-0 | +181603 |
| 10block | 24 | Sadin, Steven (1806) | Lost 0-0 | -141589 |
| 11block | 30 | Pelcak, John (1845) | Lost 0-0 | -141575 |
| 12block | 29 | Zaworski, Peter S (1533) | Won 0-0 | +171592 |
| 13block | 24 | Clay, Chris (1583) | Won 0-0 | +181610 |
| 14block | 17 | Kambourakis, Joseph (1601) | Lost 0-0 | -181592 |
| 15block | 26 | Huang, Jeff (1505) | Won 0-0 | +171609 |
| top | average opponent: 1644record: 10-5 | new rating: 1609 | ||