Some had asked how to post a game. Here are the steps graphically:Open your game and grab the pgn. You can either open it with a chess program and get the pgn that way or save it and open it in a text editor, like notepad, and copy it to clipboard.
After you have the pgn in clipboard, go to the forums and start a topic (or go to a topic that already exists). Give your topic a title and then click on the chessboard icon as circled below. This will open a separate editing window.
This is the editing window. Choose "game or sequence of moves" if posting a game. Then click "continue."
On the page that comes up, paste your pgn into the text area marked "Use a PGN file." Click "continue."
In this page you can make comments, insert variations or flip the board to Black on bottom. If you don't want any of these things, just continue on...
This page allows you to insert, delete, change information that will appear on the final board. Most of it will have been inserted automatically from the pgn.
This page allows you to chose a color scheme, piece type, board size (if a puzzle) and whether you want to display coordinates. You can now either preview the board to see how it looks, or go ahead and insert it into your posting.
When you insert it, it will just show as a place-marker, not the actual board until you submit it. I usually "save" it first so I can look at it to be sure everything is A-OK before I actually submit it.
Hit "Submit" and your work is done.