Ishikawa, Ethan
Current rating: 1477
| Grand Prix London 2019 (WAR sealed) | starting rating: 1451 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 38 | Court, Gordon (1576) | Lost 1-2 | -161435 |
| B1sealed | 1054 | Correia, Roberto (1398) | Lost 1-2 | -181417 |
| B2sealed | 1122 | Russell, James [ENG] (1450) | Won 2-0 | +181435 |
| B3sealed | 980 | Konzelmann, Lukas (1601) | Won 2-0 | +211456 |
| B4sealed | 959 | Pisanello, Matteo (1523) | Won 2-0 | +201476 |
| B5sealed | 960 | Geuens, Peter (1402) | Won 2-1 | +161492 |
| B6sealed | 917 | Duch, Sigurd (1552) | Draw 1-1 | +11493 |
| C1sealed | 114 | Faehler, Bjoern (1592) | Lost 0-2 | -161477 |
| top | average opponent: 1512record: 4-3-1 | new rating: 1477 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 464 | Betts, Ryan (1709) | Won 2-1 | +231468 |
| 4sealed | 67 | Markeson, Scott (2008) | Lost 1-2 | -91459 |
| 5sealed | 171 | Bennett, Stephen (1594) | Lost 0-2 | -161443 |
| 6sealed | 2116 | Grendelmeier, Nadine (1387) | Won 2-0 | +171460 |
| 7sealed | 324 | Grafton, Dave (1541) | Won 2-1 | +201480 |
| 8sealed | 304 | Tuduri, Ricard (1831) | Lost 0-2 | -121468 |
| 9sealed | 303 | Montano, Jonathan (1544) | Lost 0-2 | -171451 |
| top | average opponent: 1659record: 3-4 | new rating: 1451 | ||
| Grand Prix San Jose 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 234 | Marohl, Nate (1533) | Lost 1-2 | -171483 |
| 2sealed | 483 | White, Matthew 7722 (1483) | Lost 1-2 | -181465 |
| 3sealed | 780 | Bixler, John (1464) | Won 2-0 | +181483 |
| 4sealed | 827 | Ito, Jun (1417) | Lost 0-2 | -201463 |
| 5sealed | 732 | Rothenbaum, Kyle (1444) | Lost 1-2 | -181445 |
| top | average opponent: 1468record: 1-4 | new rating: 1445 | ||