Koo, Darren
Current rating: 1663
Record: 38-28-1
| Grand Prix Brisbane 2017 (modern) | starting rating: 1608 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 125 | Van Neerven, Ben (1500) | Won 2-0 | +161624 |
| 2modern | 110 | Anglim, Raan (1520) | Won 2-0 | +161640 |
| 3modern | 1 | Cole, Chifley (1699) | Won 2-0 | +191659 |
| 4modern | 12 | Thompson, Chris [AUS] (1725) | Lost 0-2 | -171642 |
| 5modern | 96 | Ventura, Justin (1521) | Won 2-1 | +161658 |
| 6modern | 94 | Dods, Johnny (1557) | Lost 0-2 | -201638 |
| 7modern | 109 | Mulcahy, Michael (1501) | Won 2-0 | +161654 |
| 8modern | 86 | Healy, Brendan (1604) | Lost 0-2 | -191635 |
| 9modern | 131 | Milner, Rhys (1542) | Won 2-0 | +161651 |
| 10modern | 117 | Robinson, Nicholas (1544) | Draw 1-1 | -21649 |
| 11modern | 102 | Kosuga, Shuhei (1545) | Lost 1-2 | -201629 |
| 12modern | 119 | Doan, Jason [AUS] (1529) | Won 2-1 | +171646 |
| 13modern | 96 | McEvoy, Joseph (1547) | Won 2-0 | +161662 |
| 14modern | 70 | Malabello, Fabian (1564) | Lost 1-2 | -201642 |
| 15modern | 84 | Oh, Joo Hyun (1783) | Won 2-0 | +211663 |
| top | average opponent: 1579record: 9-5-1 | new rating: 1663 | ||
| Grand Prix Sydney 2016 (EMN limited) | starting rating: 1653 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 265 | Lee, Matthew [AUS] (1480) | Lost 0-2 | -211632 |
| 2sealed | 213 | Gibson, Rebecca (1436) | Won 2-0 | +151647 |
| 3sealed | 259 | Hoskin, Elliot (1590) | Lost 1-2 | -191628 |
| 4sealed | 430 | Suurland, Lex (1482) | Won 2-1 | +151643 |
| 5sealed | 361 | Hohaus, Daniel (1568) | Lost 0-2 | -191624 |
| 6sealed | 398 | Hu, Jonathan (1745) | Lost 0-2 | -161608 |
| top | average opponent: 1550record: 2-4 | new rating: 1608 | ||
| Grand Prix Sydney 2015 (BFZ limited) | starting rating: 1611 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 26 | Ramos, Jonathan (1504) | Won 2-0 | +161627 |
| 2sealed | 81 | Sabarre, Alexis (1517) | Won 2-0 | +161643 |
| 3sealed | 80 | Tessari, Marco (1554) | Won 2-0 | +161659 |
| 4sealed | 66 | Luey, Jonathan (1686) | Won 2-1 | +191678 |
| 5sealed | 2 | Sugaya, Hironobu (1796) | Won 2-0 | +201698 |
| 6sealed | 2 | Pollard, Luke (1524) | Lost 1-2 | -211677 |
| 7sealed | 47 | Lay, Nicholas (1572) | Won 2-0 | +161693 |
| 8sealed | 21 | Neagle, Justin (1546) | Lost 0-2 | -211672 |
| 9sealed | 42 | Keedle, Dante (1602) | Won 2-1 | +171689 |
| 10draft | 27 | Mines, David (1663) | Lost 1-2 | -191670 |
| 11draft | 17 | Healy, Brendan (1516) | Won 2-1 | +161686 |
| 12draft | 3 | Ball, Daniel (1724) | Lost 0-2 | -181668 |
| 13draft | 41 | Cox, Kevin J (1776) | Won 2-1 | +201688 |
| 14draft | 41 | Li, William (1727) | Lost 0-2 | -171671 |
| 15draft | 37 | Wai, Haw Chuan (1692) | Lost 0-2 | -181653 |
| top | average opponent: 1627record: 9-6 | new rating: 1653 | ||
| Grand Prix Auckland 2015 (FRF limited) | starting rating: 1565 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 103 | Britt, Matthew (1454) | Won 2-1 | +161581 |
| 2sealed | 43 | Angus, Neil (1498) | Won 2-0 | +161597 |
| 3sealed | 43 | Edwards, Cameron R (1500) | Lost 0-2 | -201577 |
| 4sealed | 99 | Brumby, Gene (1654) | Lost 1-2 | -161561 |
| 5sealed | 100 | Tan, Michael L (1499) | Lost 1-2 | -191542 |
| 6sealed | 132 | Adams, Darryl (1481) | Won 2-1 | +171559 |
| 7sealed | 99 | Smith, Nick [NZL] (1497) | Won 2-1 | +171576 |
| 8sealed | 92 | Taku, Phoenix (1515) | Won 2-0 | +161592 |
| 9sealed | 46 | Wootton, Tony (1616) | Won 2-1 | +191611 |
| top | average opponent: 1524record: 6-3 | new rating: 1611 | ||
| Grand Prix Sydney 2014 (M15 limited) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 296 | Lim, Hong Seng (1500) | Won 2-0 | +191498 |
| 2sealed | 4 | Lam, Francis (1634) | Won 2-0 | +201518 |
| 3sealed | 69 | Villanueva, Dean (1494) | Won 2-1 | +181536 |
| 4sealed | 23 | Hibberd, Jacob (1556) | Won 2-0 | +181554 |
| 5sealed | 141 | Saide, Brad (1537) | Lost 1-2 | -181536 |
| 6sealed | 65 | Hafiz, Javed (1524) | Won 2-1 | +171553 |
| 7sealed | 34 | Zappacosta, Nicholas (1575) | Won 2-1 | +191572 |
| 8sealed | 28 | Lam, Gautier (1630) | Lost 1-2 | -171555 |
| 9sealed | 53 | Seck, Ben (1852) | Won 2-1 | +231578 |
| 10draft | 28 | Van Maarseveen, Ryan (1553) | Won 2-1 | +181596 |
| 11draft | 25 | Eyre, Karl (1568) | Lost 0-2 | -191577 |
| 12draft | 15 | Soh, Weng Heng (1894) | Lost 1-2 | -121565 |
| top | average opponent: 1610record: 8-4 | new rating: 1565 | ||
| Grand Prix Brisbane 2007 (LRW limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 13 | Lo, Dominic (1574) | Lost 1-2 | -171483 |
| 5sealed | 26 | Nadebaum, Chris (1559) | Won 2-0 | +201503 |
| 6sealed | 27 | Phillips, Russell [AUS] (1553) | Won 2-0 | +191522 |
| 7sealed | 11 | Casey, Edward (1539) | Lost 1-2 | -181504 |
| 8draft | 8 | Mladenoski, Bill (1560) | Won 0-0 | +191523 |
| 9draft | 24 | Lamb, Matthew (1631) | Lost 0-2 | -161507 |
| 10draft | 9 | Graham, Michael [AUS] (1668) | Won 2-0 | +211528 |
| 11draft | 26 | Gould, Rhys (1755) | Lost 0-0 | -141514 |
| 12draft | 6 | Nicastri, Aaron (1566) | Lost 0-2 | -171497 |
| 13draft | 17 | Casey, Edward (1513) | Lost 0-0 | -181479 |
| top | average opponent: 1592record: 4-6 | new rating: 1479 | ||