Matthew Douglas Jonker
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| World ol U16 | 08/02/2003 | 1121 |  Turkey |
| World ol U16 | 08/20/2002 | 1013 |  Malaysia |
Most Played Openings as White
| ECO | Opening | Games |
| C14 | French, classical variation | 2 games |
| B32 | Sicilian defence | 2 games |
| B92 | Sicilian, Najdorf, Opovcensky variation | 1 games |
| B33 | Sicilian defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| E97 | King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) | 3 games |
| B50 | Sicilian | 2 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 1 games |
| E65 | King's Indian, fianchetto, Yugoslav, 7.O-O | 1 games |
