Madgin, David
Current rating: 1501
Record: 20-20
| Grand Prix London 2018 (RIX limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 97 | Hughes, Chris (1500) | Lost 0-2 | -191520 |
| 2sealed | 516 | Varghese, Ruben (1482) | Lost 0-2 | -191501 |
| top | average opponent: 1491record: 0-2 | new rating: 1501 | ||
| Grand Prix London 2015 (ORI standard) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 714 | Clark, Antony (1500) | Won 2-0 | +171546 |
| 2standard | 656 | Toffolo, Nathan (1522) | Won 2-0 | +181564 |
| 3standard | 685 | Keey, James (1400) | Lost 1-2 | -211543 |
| 4standard | 757 | Rowe, Richard (1462) | Won 2-0 | +161559 |
| 5standard | 758 | Attridge, Peter (1538) | Lost 0-2 | -181541 |
| 6standard | 831 | Hewitson, Kevin (1472) | Won 2-0 | +171558 |
| 7standard | 513 | Olsson, August (1535) | Won 2-1 | +171575 |
| 8standard | 535 | Bodily, Samuel (1575) | Lost 1-2 | -181557 |
| 9standard | 371 | Verri, Alessandro (1536) | Lost 0-2 | -181539 |
| top | average opponent: 1504record: 5-4 | new rating: 1539 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1025 | Charalampakis, Kostas (1500) | Won 2-0 | +181552 |
| 2sealed | 1241 | Lutter, Maximilian (1518) | Lost 1-2 | -191533 |
| 3sealed | 1258 | Rietveld, Vincent (1459) | Won 2-1 | +171550 |
| 4sealed | 1302 | Davies, Tom (1387) | Lost 1-2 | -211529 |
| top | average opponent: 1466record: 2-2 | new rating: 1529 | ||
| Grand Prix Liverpool 2015 (FRF limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 390 | Tucker, Mark (1463) | Won 2-1 | +181482 |
| 2sealed | 681 | Wright, Brett A (1518) | Won 2-0 | +191501 |
| 3sealed | 204 | Dean, Jack (1520) | Lost 0-2 | -181483 |
| 4sealed | 260 | Brown, Aaron (1556) | Lost 0-2 | -171466 |
| 5sealed | 441 | Berg, Adam (1500) | Won 2-1 | +191485 |
| 6sealed | 342 | Forbes, Michael (1527) | Won 2-0 | +191504 |
| 7sealed | 153 | Minchin, Simon (1550) | Won 2-1 | +191523 |
| 8sealed | 211 | Bohm, Philip (1455) | Won 2-1 | +161539 |
| 9sealed | 138 | Barclay, Bradley (1754) | Won 2-1 | +221561 |
| 10draft | 36 | Oppliger, Daniel (1620) | Lost 1-2 | -171544 |
| 11draft | 41 | Hughes, Nathan (1606) | Won 2-1 | +191563 |
| 12draft | 41 | Hay, Christopher (1761) | Lost 1-2 | -141549 |
| 13draft | 54 | Love, James (1632) | Lost 1-2 | -161533 |
| 14draft | 44 | Jones, Toby (1571) | Lost 1-2 | -181515 |
| 15draft | 75 | Sulzer, Jeremy (1570) | Won 2-1 | +191534 |
| top | average opponent: 1573record: 9-6 | new rating: 1534 | ||
| Grand Prix London 2013 (GTC limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 604 | Plummer, Richard (1527) | Lost 1-2 | -171484 |
| 2sealed | 660 | Say, Ian (1479) | Lost 0-2 | -181466 |
| 3sealed | 760 | Eade, Jon (1463) | Won 2-0 | +181484 |
| 4sealed | 751 | Taylor, James (1396) | Lost 1-2 | -201464 |
| top | average opponent: 1466record: 1-3 | new rating: 1464 | ||
| Grand Prix Manchester 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 482 | Yin, Lai Chi (1446) | Lost 0-2 | -191481 |
| 2sealed | 532 | Cox, Tobias L (1487) | Won 2-1 | +181499 |
| 3sealed | 541 | Cordier, Kris (1527) | Won 2-1 | +191518 |
| 4sealed | 494 | Turford, Neil A (1517) | Won 2-1 | +181536 |
| 5sealed | 529 | McLellan, Scott (1510) | Lost 0-2 | -191517 |
| 6sealed | 558 | Rovny, Robert (1642) | Lost 0-2 | -161501 |
| top | average opponent: 1521record: 3-3 | new rating: 1501 | ||