what evidence is therefor the banning it (chess).
the only one i found was this:
Sahih Muslim
Book 028, Number 5612:
Buraida reported on the authority of his father that Allah's Apostle (may peace be upon him) said: He who played chess is like one who dyed his hand with the flesh and blood of swine.
However in the original arabic, it is found that the word they used is النَّرْدَشِيرِ, and it is translated as gambling dice or backgammon, NOT CHESS, so they proper translation is:
He who plays with Gambling dice (or backgammon) is like one who dipped his hand with the flesh and blood of swine.
Most other claims i met have no sources to back up their claims.
Chess increases you analytical ability,it is a beneficial pastime and a fun, competitive sport.