Here's another chess-type variant. We've seen multi-layered chess, Fischer Random, multi-player chess, crazy and bughouse and who knows how many others. Now comes Arimaa. It's been around 7 years, but I heard of it for the first time today.
AI computers have yet to soundly beat humans at this game. The inventor of the game, Omar Syed, has offered a $10,000 prize to the computer developer who can design a program that can beat a human at this game.
The reason computers have a hard time winning is because of the incredible branch factor in Arimaa. According to the wikipedia article, "the average branching factor in a game of Chess is about 35, whereas in Arimaa it is about 17,281." WOW!
You don't have to buy the game to play it. You can simply use a standard chess board and pieces to play. But if you really want the real deal, the game is finally being published.
Have any of you heard of this game before? Have any of you played?