Ngai, David
Current rating: 1651
Record: 31-23-1
| Grand Prix Vancouver 2018 (UMA limited) | starting rating: 1690 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 134 | Tsang, Bill (1703) | Lost 0-2 | -181672 |
| 2sealed | 345 | Lewis, Daniel (1483) | Lost 1-2 | -211651 |
| top | average opponent: 1593record: 0-2 | new rating: 1651 | ||
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 70 | Conway, Kyle (1500) | Won 2-0 | +161650 |
| 2sealed | 98 | Dimond-Gibson, John (1517) | Won 2-1 | +151665 |
| 3sealed | 174 | Gauthier, Martin-Eric (1993) | Lost 1-2 | -121653 |
| 4sealed | 302 | Bold Wark, Lewis (1666) | Won 2-0 | +181671 |
| 5sealed | 179 | Lindsay, Michael (1533) | Won 2-0 | +161687 |
| 6sealed | 62 | Stella, Daniel (1741) | Lost 0-2 | -171670 |
| 7sealed | 163 | Mondello, Jake (1761) | Won 2-1 | +201690 |
| 8sealed | 99 | Morse, Sean (1758) | Won 2-0 | +191709 |
| 9sealed | 57 | Jefkins, Michael (1601) | Lost 1-2 | -201689 |
| 10draft | 158 | Baraniecki, Michael (1954) | Won 2-1 | +231712 |
| 11draft | 130 | McCarrell, Jason (1509) | Lost 0-2 | -221690 |
| top | average opponent: 1685record: 7-4 | new rating: 1690 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 722 | LaFord, Valiant (1471) | Draw 1-1 | -21565 |
| 2sealed | 536 | Casby, Christopher (1549) | Won 2-0 | +181583 |
| 3sealed | 565 | Lacsamana, Flint (1519) | Won 2-1 | +171600 |
| 4sealed | 316 | Fields, Larry (1558) | Won 2-1 | +171617 |
| 5sealed | 157 | Engler, Wes (1555) | Won 2-0 | +171634 |
| 6sealed | 71 | Spano, Greggory (1831) | Won 2-1 | +211655 |
| 7sealed | 35 | Lu, Xiaoshi (1956) | Lost 0-2 | -121643 |
| 8sealed | 117 | Cornett, Joshua (1537) | Won 2-0 | +161659 |
| 9sealed | 68 | Colista, Anthony (1638) | Lost 1-2 | -191640 |
| 10draft | 111 | Li, Lucas Muxi (1701) | Won 2-0 | +201660 |
| 11draft | 273 | Gonzales, Benny (1515) | Won 2-1 | +151675 |
| 12draft | 186 | Shannon, Jason (1535) | Lost 1-2 | -211654 |
| 13draft | 186 | York, Derrick (1531) | Won 2-0 | +161670 |
| 14draft | 113 | Chen, Elly (1613) | Lost 1-2 | -191651 |
| 15draft | 140 | Aiken, Simone (1715) | Lost 1-2 | -171634 |
| top | average opponent: 1615record: 9-5-1 | new rating: 1634 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1586 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1128 | Sorknaes, Johan (1519) | Lost 0-2 | -191567 |
| top | record: 0-1 | new rating: 1567 | ||
| Grand Prix Vancouver 2014 (THS standard) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 168 | Ferguson, Aidan (1500) | Won 2-0 | +171573 |
| 2standard | 212 | Piggott, Michael (1484) | Won 2-1 | +161589 |
| 3standard | 141 | Chassie, Claude (1509) | Won 2-0 | +171606 |
| 4standard | 58 | Chateau, Patrick (1537) | Won 2-0 | +161622 |
| 5standard | 96 | Boese, Travis (1584) | Lost 1-2 | -181604 |
| 6standard | 49 | Christie, Ryan R (1634) | Lost 0-2 | -181586 |
| top | average opponent: 1541record: 4-2 | new rating: 1586 | ||
| Grand Prix Vancouver 2012 (AVR limited) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 135 | Fenton, Stephanie (1518) | Won 2-0 | +181525 |
| 3sealed | 41 | Clowery, Andrew (1534) | Lost 1-2 | -181507 |
| 4sealed | 149 | Whitwell, Colin (1518) | Won 2-1 | +181525 |
| 5sealed | 128 | Upshaw, Kayla (1483) | Won 2-0 | +181543 |
| 6sealed | 66 | Van Manen, Thomas (1553) | Lost 0-2 | -181525 |
| 7sealed | 142 | Lilly, Christopher (1535) | Won 2-0 | +181543 |
| 8sealed | 57 | Sweezey, Scott (1506) | Won 2-1 | +171560 |
| 9sealed | 53 | Whittington, Michael 2 (1532) | Won 2-0 | +181578 |
| 10draft | 63 | Blum, Tyler (1808) | Lost 0-2 | -141564 |
| 11draft | 59 | Shelton, Luke (1581) | Lost 0-2 | -181546 |
| 12draft | 58 | MacDonald, Dylan (1658) | Lost 1-2 | -161530 |
| 13draft | 48 | Yan, Tony (1546) | Won 2-1 | +191549 |
| 14draft | 4 | Costa, Matthew (1983) | Won 2-1 | +251574 |
| 15draft | 48 | Jacura, Jordie (1559) | Lost 1-2 | -181556 |
| top | average opponent: 1594record: 8-6 | new rating: 1556 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 44 | Harris, Scott (1464) | Won 2-0 | +171517 |
| 3sealed | 27 | Meyer, Ben (1489) | Won 2-0 | +181535 |
| 4sealed | 1 | HUDON, CHUCK (1554) | Won 2-0 | +181553 |
| 5sealed | 43 | Downing, Eric (1725) | Lost 0-2 | -151538 |
| 6sealed | 71 | Bau, Philip (1775) | Lost 1-2 | -131525 |
| 7sealed | 174 | Isleib, Brandon T (1539) | Lost 0-2 | -181507 |
| top | average opponent: 1591record: 3-3 | new rating: 1507 | ||