Wolf chess

Wolf chess, known in German as Wolf-Schach, is a chess variant invented by Dr. Arno von Wilpert in 1943. It is played on an enlarged eighty-square board, ten files by eight ranks, and introduces several compound fairy pieces alongside the conventional chess army. Its wolf pieces combine the moves of a rook and a knight in one unit, while its fox pieces combine the moves of a bishop and a knight, giving both sides additional long-range and jumping threats beyond orthodox chess. The variant also adds nightriders, pieces that can repeat a knight's leap in a straight line across multiple squares in one move, and sergeants, pieces with their own distinct restricted movement, expanding the tactical vocabulary available on the larger board. Wolf chess moved beyond casual play into organized competition: a correspondence match held in September 1960 between clubs in Paris and Augsburg is claimed as the first international over-the-board match ever played for a chess variant, cited as evidence of the game's early serious following.