The half-pin, a concept dating back to the 19th century, remains a persistent problem in chess. The basic concept can be seen in real games as well.
Ghostrider Chess, an intriguing variant devised by Ralph Betza in 1978, has piqued my interest due to its suitability for a game server implementation. This captivating game is played on a traditional 8×8 chessboard, utilizing standard pieces, with the exception of the knights.
A seriesmover refers to a chess problem where one side executes a consecutive sequence of valid moves without any response from the opposing side. The sequence culminates with the other side performing a single move that results in either a checkmate or a stalemate, depending on the specific conditions given in the problem.
Gyula “Julius” Breyer was a Hungarian chess master, one of the best chess players of his time. In addition to winning the Hungarian Championship in 1912 and several other significant tournaments, he made his mark in chess history by setting a new record (in 1921) for blindfolded play, managing to compete against 25 opponents simultaneously.