Correspondence Chess

Correspondence chess is a chess where the two players don't sit at the same chess board at the same time.

For transmission of moves correspondence chess servers, email or snail mail are used.

Reflection time is normally measured in days.

A player can compete in different tournaments at the same time.

Players normally use computer programs to generate or control their moves before they send them to their opponent.

As the leading computer programs are now very strong correspondence chess has lost a lot of it's charme. The top organizations have lost a lot of members the last years. 

The influence of computer generated analysis is overwhelming. Only a few top players are capable of beating opponents who rely on the best hardware/software combinations. 

Correspondence Chess organizations:

ICCF (International Correspondence Chess organization)

The ICCF is the leading correspondence chess organization. The ICCF is the head of the national correspondence chess organizations and organizes
Worldchampionships, Olympiads and international tournaments.