- Chess World Cup
- FIDE Grand Prix
- Olympiad
- World Championship
- List of strong tournaments
- List of world championships
- Checkmate patterns
- Chess openings
- Chess strategy
- Chess tactics
- Chess theory
- Endgames
- Pawn structure
- Problems/Compositions
| Country | Estonia |
|---|---|
| Born | 16 June 1941 Tallinn, Estonia |
| Title | ICCF Grandmaster (1981) |
| ICCF World Champion | 1977-83 1994-99 |
Tõnu Õim (born 16 June 1941 in Tallinn) is an Estonian grandmaster of correspondence chess, most famous for being the first to have won the ICCF World Championship in correspondence chess twice, in 1983 and 1999.