Chapin, Sam
Current rating: 1548
Record: 42-39-1
| Grand Prix New Jersey 2020 (THB limited) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 16 | DiPietro, Dean (1538) | Won 2-1 | +181553 |
| 2sealed | 92 | Pernankil, Avenash (1969) | Lost 0-2 | -111542 |
| 3sealed | 440 | Farrugia, Marco (1731) | Lost 1-2 | -151527 |
| 4sealed | 525 | Gardiner, James (1593) | Lost 1-2 | -161511 |
| 5sealed | 546 | Shepard, Derek (1499) | Lost 1-2 | -191492 |
| 6sealed | 468 | Spiegel, Daniel (1450) | Won 2-0 | +181510 |
| 7sealed | 352 | Marquez, Randall (1440) | Won 2-1 | +161526 |
| 8sealed | 258 | Pileggi, Riccardo (1704) | Won 2-1 | +221548 |
| top | average opponent: 1616record: 4-4 | new rating: 1548 | ||
| Grand Prix Toronto 2019 (modern) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 103 | Wells-Garrett, Nick (1500) | Lost 0-2 | -191516 |
| 2modern | 516 | Dojcsak, Mike (1563) | Won 2-1 | +191535 |
| 3modern | 526 | Sharpe, Austin (1502) | Won 2-1 | +171552 |
| 4modern | 146 | Tate, Coulter (1574) | Lost 0-2 | -171535 |
| 5modern | 344 | Goertz, Charles (1505) | Won 2-1 | +171552 |
| 6modern | 219 | Ravanello, Trevor (1655) | Won 2-1 | +201572 |
| 7modern | 148 | Puzio, Stephen (1541) | Lost 1-2 | -191553 |
| 8modern | 198 | Ledesma, Earl (1523) | Lost 0-2 | -181535 |
| top | average opponent: 1545record: 4-4 | new rating: 1535 | ||
| Grand Prix Pittsburgh 2018 (DOM standard) | starting rating: 1580 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 5 | Schrecengost, Mark (1521) | Won 2-1 | +171597 |
| 2standard | 3 | McNeil, William (1574) | Lost 0-2 | -181579 |
| 3standard | 375 | Neuenschwander, Erich (1491) | Lost 0-2 | -201559 |
| 4standard | 413 | Baverso, Vincent (1428) | Lost 0-2 | -201539 |
| 5standard | 380 | Darby, Joseph (1378) | Won 2-0 | +151554 |
| 6standard | 304 | Madison, Anna (1618) | Lost 1-2 | -171537 |
| 7standard | 312 | Mrozek, Brian (1464) | Won 2-1 | +171554 |
| 8standard | 256 | Atkinson, Maurice (1499) | Lost 1-2 | -191535 |
| top | average opponent: 1497record: 3-5 | new rating: 1535 | ||
| Grand Prix Minneapolis 2017 (HOU standard) | starting rating: 1575 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 295 | Schriever, Daniel (1469) | Lost 0-2 | -201555 |
| 2standard | 387 | Rodgers, Clinton (1490) | Won 2-0 | +161571 |
| 3standard | 318 | LaPlant, Parker (1444) | Won 2-0 | +161587 |
| 4standard | 127 | Shimek, Alex (1546) | Lost 0-2 | -191568 |
| 5standard | 382 | Wiedewitsch, Ryan (1450) | Won 2-0 | +161584 |
| 6standard | 184 | Kochaver, Steve (1491) | Won 2-1 | +171601 |
| 7standard | 154 | Pisano, Rob (1732) | Lost 1-2 | -161585 |
| 8standard | 215 | Meier, Jeremy (1476) | Won 2-1 | +161601 |
| 9standard | 199 | Prentice, Aaron (1542) | Won 2-1 | +171618 |
| 10standard | 549 | Salley, Jace (1605) | Lost 0-2 | -181600 |
| 11standard | 574 | Dean, Jordan (1607) | Lost 0-2 | -181582 |
| 12standard | 596 | Williams, Gabriel (1553) | Won 2-1 | +171599 |
| 13standard | 586 | Ulmer, Chris (1538) | Lost 0-2 | -191580 |
| top | average opponent: 1534record: 7-6 | new rating: 1580 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1614 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 25 | Raymer, Bryan (1480) | Lost 0-2 | -211593 |
| 2standard | 456 | Philo, Lennon (1482) | Won 2-0 | +161609 |
| 3standard | 445 | Schmuckler, Brett (1723) | Lost 1-2 | -151594 |
| 4standard | 526 | Wilson, Edward (1541) | Lost 1-2 | -191575 |
| top | average opponent: 1556record: 1-3 | new rating: 1575 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1525 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 365 | Hall, Kyle (1447) | Won 2-1 | +171542 |
| 2modern | 495 | Bennett, Ryan (1511) | Won 2-0 | +171559 |
| 3modern | 181 | Grasso, Michael (1410) | Won 2-1 | +151574 |
| 4modern | 385 | Crump, Eric (1662) | Won 2-1 | +201594 |
| 5modern | 70 | Bruce, Adam (1546) | Lost 1-2 | -191575 |
| 6modern | 38 | Mullen, Collins (1526) | Won 2-1 | +171592 |
| 7modern | 167 | Hakenewerth, Andrew (1595) | Lost 1-2 | -181574 |
| 8modern | 302 | Dobeck, Josh (1550) | Won 2-0 | +181592 |
| 9modern | 216 | Shortino, Justin (1568) | Won 2-0 | +171609 |
| 10modern | 49 | Evans, Alex (1617) | Lost 0-2 | -171592 |
| 11modern | 233 | Coon, Robert (1611) | Won 2-0 | +181610 |
| 12modern | 130 | Collins, Kenyon (1644) | Lost 0-2 | -171593 |
| 13modern | 185 | Lim, Alexander 288 (1562) | Won 2-1 | +171610 |
| 14modern | 97 | Winn, Tyler (1776) | Lost 1-2 | -151595 |
| 15modern | 135 | Opperman, Michael (1644) | Won 2-1 | +191614 |
| top | average opponent: 1578record: 10-5 | new rating: 1614 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1531 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 260 | Bogdon, Brian (1478) | Lost 1-2 | -191512 |
| 2standard | 447 | Bailey, Alex (1451) | Won 2-0 | +161528 |
| 3standard | 434 | Tremblay, John (1515) | Won 2-1 | +181546 |
| 4standard | 294 | Alcock, Brian (1432) | Lost 0-2 | -201526 |
| 5standard | 586 | Renaud, Sebastien (1500) | Won 2-0 | +181544 |
| 6standard | 289 | McGregor, Cameron (1517) | Lost 1-2 | -191525 |
| top | average opponent: 1482record: 3-3 | new rating: 1525 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 936 | Kraft, Adrian (1500) | Draw 1-1 | +11455 |
| 2legacy | 1040 | Stone, Evan (1482) | Won 2-1 | +191474 |
| 3legacy | 984 | Osso, Stephen (1455) | Lost 0-2 | -191455 |
| 4legacy | 1122 | Rendina, Nicholas (1500) | Won 2-1 | +191474 |
| 5legacy | 842 | O'Hara, Daniel (1583) | Won 2-0 | +201494 |
| 6legacy | 742 | Wilson, Douglas (1497) | Won 2-1 | +181512 |
| 7legacy | 666 | Wikstrom, Mikael (1498) | Won 2-0 | +181530 |
| 8legacy | 623 | Smythe, Tony (1536) | Won 2-1 | +181548 |
| 9legacy | 593 | Soi, Vivek (1573) | Lost 1-2 | -171531 |
| top | average opponent: 1514record: 6-2-1 | new rating: 1531 | ||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 146 | Bakalar, Val (1705) | Won 2-0 | +221467 |
| 3legacy | 76 | Lebron, Anthony (1669) | Lost 1-2 | -141453 |
| 4legacy | 547 | Mehta, Robin (1519) | Won 2-0 | +191472 |
| 5legacy | 333 | Allen, Stephen (1522) | Lost 0-2 | -171455 |
| 6legacy | 405 | Polca, Shawn (1379) | Won 2-1 | +171472 |
| 7legacy | 387 | Ketel, Ben (1519) | Lost 0-2 | -181454 |
| top | average opponent: 1552record: 3-3 | new rating: 1454 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 115 | Ohinata, Jun (1500) | Lost 1-2 | -181482 |
| 2standard | 524 | Mitchell, Billy (1467) | Lost 1-2 | -181464 |
| 3standard | 636 | Weaver, James (1526) | Lost 0-2 | -171447 |
| 4standard | 745 | Opauski, Branden (1414) | Lost 1-2 | -191428 |
| 5standard | 688 | Nelms, Kemp (1335) | Won 2-0 | +171445 |
| top | average opponent: 1448record: 1-4 | new rating: 1445 | ||