In my opinion Diplomacy is a game well suited for correspondence gameplay. Not only is it difficult to get all the players to commit the necessary time on a day everyone is available, but it is also much more fun since you can plan your moves more freely. We've even gotten used to planning moves with one another using Evernote throughout the week.

Some friends and I have been playing this way for a few years now, and hands down it is a better experience than using any of the cumbersome boards and having to manually adjudicate everything.

Submit one move every Tuesday, it's now a tradition.