"Beginner, intermediate and master...A puzzle for each" by yitzd
http://www.chess.com/forum/view/chess-players/beginner-intermediate-and-master-a-puzzle-for-each
I would nominate at least three more yitzd threads, the above is just a quick read to understand his genius
I've always liked this one
Computer by woodshover
http://www.chess.com/forum/view/community/computer
http://www.chess.com/forum/view/endgames/why-resign-a-game?page=1
One of those resign/don't resign threads that took off into the ether. It even contains the first appearance of the famous the sky is blue or not debate.
what about the photos and pictures thread that was good, you started that did you goldendog ?
Which five threads on this site do you think are most memberable and deserve mention? This uses the same scoring system as my previous top five threads, so read those if you want to see it.
Current Poll Leaders as of 8/16/11 8:45 PST
http://www.chess.com/forum/view/chess-players/beginner-intermediate-and-master-a-puzzle-for-each - 5 points
http://www.chess.com/forum/view/community/computer - 4 points