Category: Chess
"Maths & Unusual Chess" groups, social networks and other links
http://www.facebook.com/home.php#/pages/Maths-Unusual-Chess/141704853375
http://www.facebook.com/home.php#/group.php?gid=142511559429
http://www.linkedin.com/groups?home=&gid=1789397&trk=anet_ug_hm
http://www.anobii.com/groups/01527374d0… more »