The challenge board project aims to be an open source ladder system that can be used to run any number of competitive events. If you can compete against a single an opponent, you can can have a challenge board.

Competitors can move up and down on the board by playing amongst each other and submitting the results. Standings are currently calculated using a standard Chess ELO algorthym.

• ASP.NET 4.5
• .NET 4.0
• SQL Server (you optionally can swap in a different provider)

At this time, I don't believe that mono supports the asyc pipeline that ASP.NET 4.5 requires.

• Demo site on AppHarbor: http://challengeboard.apphb.com/
• Trello Board: https://trello.com/board/challenge-board/50e88cfdcba7353c10002706