Book excerpt: "[It's] enough to drive experienced chess players to insanity, but they will enjoy the ride....The author warns the reader from the start anything goes....Buy this book...and have fun!"--Games It's outrageous and amazing and irresistible: these brainbusting chess problems are the devilish inventions of the world's greatest puzzle creators. Chess mavens won't believe what they'll find, because in these games, the usual rules just don't apply. For example, there's Billiards Chess, where pieces can carom off the board at a right angle and return. In Checkless Chess, check is an illegal move...unless it's checkmate. Refusal Chess allows a player to refuse an opponent's move and demand an alternative. There's even a variation called Collaboration, in which both sides must cooperate to achieve checkmate. And, the coup de grace: the world's hardest chess problem ever posed.