Ahn, Ei Yong
Current rating: 1512
Record: 27-30
| Grand Prix Strasbourg 2019 (RNA limited) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 358 | Castro Saa, Sergio (1552) | Lost 0-2 | -171494 |
| 3sealed | 594 | La Batide-Alanore, Thibault (1499) | Won 2-0 | +181512 |
| 4sealed | 368 | Farcas-Lohan, Jougene (1692) | Lost 1-2 | -151497 |
| 5sealed | 432 | Dolmatov, Dmitry (1481) | Won 2-0 | +181515 |
| 6sealed | 391 | Vos, Tristan (1473) | Won 2-1 | +171532 |
| 7sealed | 159 | Doisneau, Pierre-Antoine (1440) | Lost 1-2 | -201512 |
| top | average opponent: 1523record: 3-3 | new rating: 1512 | ||
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 484 | Mandel, Maximilian (1518) | Lost 0-2 | -181491 |
| 3sealed | 806 | Sayour, Fabio (1538) | Won 2-0 | +191510 |
| 4sealed | 761 | Aarela, Tommi (1592) | Won 2-1 | +191529 |
| 5sealed | 190 | Silva Gomez, Eduardo Zeus (1489) | Lost 0-2 | -191510 |
| 6sealed | 483 | Bohse Kabbeltved, Nicolai (1488) | Won 2-1 | +181528 |
| 7sealed | 473 | Widawski, William (1574) | Lost 0-2 | -171511 |
| top | average opponent: 1533record: 3-3 | new rating: 1511 | ||
| Grand Prix Lille 2018 (GRN standard) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 285 | Lahonen, Leo (1941) | Won 2-0 | +261511 |
| 4standard | 16 | Hautot, Mathieu (1906) | Lost 1-2 | -111500 |
| 5standard | 157 | Moreau, Martial (1565) | Lost 1-2 | -171483 |
| 6standard | 350 | Bergerot, Nicolas (1835) | Won 2-1 | +241507 |
| 7standard | 297 | Konzelmann, Lukas (1493) | Lost 1-2 | -181489 |
| 8standard | 270 | Kunsch, Joe (1594) | Won 2-1 | +201509 |
| top | average opponent: 1722record: 3-3 | new rating: 1509 | ||
| Grand Prix Prague 2018 (modern) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 47 | Holzinger, Thomas (1845) | Lost 1-2 | -121485 |
| 3modern | 578 | Henning, Robin (1368) | Won 2-0 | +161501 |
| 4modern | 391 | Skovgaard, Kaare (1502) | Won 2-1 | +181519 |
| 5modern | 192 | Darras, Alexandre (1617) | Lost 0-2 | -161503 |
| 6modern | 574 | Abramov, Andrey (1483) | Lost 1-2 | -181485 |
| 7modern | 595 | Groth, Johannes (1473) | Won 2-1 | +171502 |
| 8modern | 381 | Bramreiter, Dominik (1536) | Lost 0-2 | -171485 |
| top | average opponent: 1546record: 3-4 | new rating: 1485 | ||
| Grand Prix Lyon 2018 (modern) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 395 | Micheloud, Nelson (1500) | Lost 0-2 | -171437 |
| 2modern | 755 | Rielves, Alvaro (1624) | Lost 1-2 | -141423 |
| 3modern | 897 | Benacchio, Julien (1464) | Won 2-1 | +181441 |
| 4modern | 795 | Bowring, Atticus (1443) | Won 2-1 | +181459 |
| 5modern | 475 | Jorgensen, Steffen Storm (1464) | Won 2-1 | +181477 |
| 6modern | 440 | Burgin, Reto (1449) | Won 2-0 | +181495 |
| 7modern | 183 | Viik, Allan (1572) | Lost 0-2 | -171478 |
| 8modern | 474 | Domenico, Del Barba (1527) | Won 2-1 | +191497 |
| top | average opponent: 1505record: 5-3 | new rating: 1497 | ||
| Grand Prix London 2018 (RIX limited) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Schneider, Jan (1500) | Lost 0-2 | -191508 |
| 2sealed | 626 | Roginski, Tom (1598) | Lost 0-2 | -161492 |
| 3sealed | 897 | Zeil, Jean-Julien (1646) | Lost 1-2 | -151477 |
| 4sealed | 929 | Cannon, John (1357) | Won 2-0 | +151492 |
| 5sealed | 816 | Wright, Oliver (1471) | Lost 0-2 | -181474 |
| 6sealed | 744 | Nuthall, Mark (1622) | Lost 1-2 | -151459 |
| 7sealed | 640 | Knebel, Sebastian (1268) | Lost 1-2 | -221437 |
| 8sealed | 549 | Huizinga, Sander (1384) | Won 2-1 | +171454 |
| top | average opponent: 1481record: 2-6 | new rating: 1454 | ||
| Grand Prix Utrecht 2017 (AER standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 137 | Crusafio, Vincenzo (1622) | Won 2-0 | +201547 |
| 4standard | 141 | Lewandowski, Bartlomiej (1867) | Won 2-0 | +231570 |
| 5standard | 54 | Sommen, Pierre (2055) | Lost 1-2 | -101560 |
| 6standard | 92 | Ohliger, Mateo (1600) | Lost 0-2 | -171543 |
| 7standard | 235 | Nizon, Jerome (1616) | Won 2-1 | +201563 |
| 8standard | 102 | Tonkin, Debbie (1545) | Lost 1-2 | -191544 |
| 9standard | 183 | Wurzer, Marcel (1574) | Lost 0-2 | -171527 |
| top | average opponent: 1697record: 3-4 | new rating: 1527 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 245 | Starnini, Matteo (1573) | Lost 1-2 | -171483 |
| 2sealed | 567 | Minton, Richard (1470) | Won 2-0 | +181501 |
| 3sealed | 586 | Reber, Philipp (1459) | Won 2-1 | +171518 |
| 4sealed | 451 | Lebesbye, Torgeir (1552) | Won 2-1 | +191537 |
| 5sealed | 328 | Leupold, Kim (1543) | Won 2-1 | +181555 |
| 6sealed | 228 | De Swarte, Daniel (1547) | Lost 1-2 | -181537 |
| 7sealed | 260 | Christensen, Jon Magnus (1551) | Won 2-1 | +181555 |
| 8sealed | 173 | Sondag, Guido (1781) | Lost 1-2 | -141541 |
| 9sealed | 283 | van der Meer, Thijs (1747) | Lost 0-2 | -141527 |
| top | average opponent: 1580record: 5-4 | new rating: 1527 | ||