Really Bad Chess is an engaging and wacky version of the classic game, which assigns players a random set of chess pieces. The pieces move in the same way as in regular chess, but players could end up with three bishops, a couple of queens, five knights — you never know what you’re going to get. The result is a controlled version of chaos on the chessboard, and it provides an interesting challenge for new and old chess players. The free version of the game pits players against the game’s artificial intelligence in a few game modes that let you improve your rank among all of the game’s players. You can also pay $3 to unlock a pass-and-play mode, which has an ad-free mode.

Players have the opportunity to exercise the critical thinking and planning skills that are so fundamental to the traditional game. Overall, it’s a fun version of an old game that, wonderfully, doesn’t take itself too seriously. Free, for iOS devices.