Czech Bughouse Chess - Includes a quiz, commented games, DoubleChessBoard and other software. In Czech and English. Bughouse Chess - Bughouse in java, for beginners. Tandem Chess and Bughouse - Bughouse rules and strategy, as well as information about playing by email. Bughouse in Europe - Information about bughouse and bughouse gatherings in Europe. Sunsetter Bughouse Engine - A program that plays chess and crazyhouse chess (single board bughouse) on internet chess servers, released under the GPL. Sjeng - An attempt to create a bughouse and crazyhouse playing program that can attain a level comparable to the best human players. DoubleChessBoard - Software download for Bughouse chess. Bughouse.net - Rules, openings, strategy, rankings, and tournaments for a chess game in which two boards are used and four people can play.