My question was going to be: Have you ever read Schmidttberger's New Rules for Classic Games? It's a surprisingly fun book and it mentions Bughouse and Refusal Chess. It also mentions a similar game to Refusal called Compromise Chess, wherein the player whose turn it is offers both possible moves simultaneously, and the opponent gets to pick which one is implemented. Personally this sounds even more frustrating. But now that you've described the other, it really does sound like it has more potential than I gave it credit. Another interesting game is Double Move Chess, where each player gets two moves, except on the first move where white only gets one. The goal is merely to capture the king, and it is very difficult to predict, and games are often very short. There are a number of cool chess variants and other game variants (checkers, backgammon, etc.) in this book, and the whole concept of chess variants has fascinated me for years. Truthfully, I am a serious chess variant lover, but I've had few converts to my passion, so usually it's more imagining what I'd love to try rather than actually playing.