There are special rules for correspondence chess, blitz chess, computer chess, and for handicapped players.
There are other systems such as ICCF numeric notation for international correspondence chess and the obsolete descriptive chess notation.
In correspondence chess, a player may consult a chess computer for assistance, provided that the etiquette of the competition allows this.
He was United States correspondence chess champion in 1943 and the United States representative in the first world correspondence chess championship in 1948.
Organized chess tournaments, postal correspondence games, and Internet chess now attract men, women, and children around the world.
Ron Langeveld of the Netherlands did not receive a lot of attention when he won the World Correspondence Chess Championship in October.
He came in high in various tournaments, and he also was the World's Correspondence Chess Champion.
For players who prefer correspondence chess, in which competitors have days to make each move, there is the International Correspondence Chess Federation, the governing body of slow chess.
It was started in 1992 by Joop van Oosterom, a Dutch billionaire, software designer and world correspondence chess champion, and was named for his daughter.
Two great over-the-board players who also played correspondence chess, Wilhelm Steinitz, the first world champion, and Joseph Blackburne, were arrested as spies at different times in the 19th century because officials mistook their chess moves for encoded messages.
