McKenzie, John
Current rating: 1486
Record: 12-15
| Grand Prix London 2019 (WAR sealed) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 270 | Baudois, Guillaume (1569) | Lost 0-2 | -171492 |
| A2sealed | 192 | Kavemann, Tobias (1529) | Won 2-0 | +191511 |
| A3sealed | 197 | Rossi, Claudio (1680) | Lost 1-2 | -151496 |
| C1sealed | 274 | Muhlbock, Marc (1835) | Lost 1-2 | -121484 |
| C2sealed | 267 | Gadnell, Fredrik (1490) | Won 2-0 | +181502 |
| C3sealed | 212 | Bell, Rebecca (1593) | Lost 1-2 | -161486 |
| top | average opponent: 1616record: 2-4 | new rating: 1486 | ||
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 59 | Roth, Patrick (1335) | Won 2-0 | +151519 |
| 2sealed | 314 | Angelopoulos, Marios (1793) | Won 2-1 | +231542 |
| 3sealed | 347 | Stifter, Christian (1681) | Lost 1-2 | -151527 |
| 4sealed | 543 | Greenslade, Luke (1388) | Won 2-1 | +151542 |
| 5sealed | 307 | Johansson, Jens (1680) | Lost 0-2 | -151527 |
| 6sealed | 360 | Moragriega Alonso, Marc (1556) | Lost 1-2 | -181509 |
| top | average opponent: 1572record: 3-3 | new rating: 1509 | ||
| Grand Prix Liverpool 2017 (XLN limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 332 | Blades, Aiden (1408) | Won 2-1 | +171485 |
| 2sealed | 174 | Morrell, Robert (1443) | Won 2-1 | +171502 |
| 3sealed | 248 | Moral, Carlos (1977) | Lost 1-2 | -101492 |
| 4sealed | 209 | Hough, Philip (1377) | Won 2-1 | +161508 |
| 5sealed | 142 | van den Wouwer, Chris (1584) | Lost 0-2 | -171491 |
| 6sealed | 172 | Borrnert, Andreas (1368) | Won 2-1 | +161507 |
| 7sealed | 160 | Giroud, Pierre (1657) | Won 2-1 | +211528 |
| 8sealed | 133 | Channing, Henry (1899) | Lost 1-2 | -121516 |
| 9sealed | 166 | Leroy, Yannick (1856) | Lost 1-2 | -121504 |
| top | average opponent: 1619record: 5-4 | new rating: 1504 | ||
| Grand Prix London 2016 (KLD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 293 | Seidl, Julius (1500) | Lost 1-2 | -181482 |
| 2sealed | 780 | Paskov, Dobrin (1552) | Lost 0-2 | -171465 |
| 3sealed | 1079 | Jones, Edward (1434) | Won 2-1 | +181483 |
| 4sealed | 1070 | Nicholls, Tommy (1481) | Won 2-1 | +181501 |
| 5sealed | 588 | Jensen, Thomas Dall (1711) | Lost 0-2 | -151486 |
| 6sealed | 809 | Zhang, Argent (1456) | Lost 1-2 | -181468 |
| top | average opponent: 1522record: 2-4 | new rating: 1468 | ||