Mohammed On Chess
I always liked chess, it's one of the few games that requires skill without the aid of luck. How was I to know it was a sin?
Mohammad on Playing Chess:
"Buraida reported on the authority of his father that Allah's Apostle said: He who played chess is like one who dyed his hand with the flesh and blood of swine."
Sahih Islam, Book 028, Number 5612.
So because Mohammad was a bad chess player and a sore loser, now muslims are forbidden from playing chess.