Airborne, I copied what's following from somewhere else in the web, in defense of draws:
"Diplomacy is a game about communication. Communication between people you trust, people you don't, people you call ally, and those you call enemy - and that is the heart of the game. It even says so in the Diplomacy 4th edition rulebook, though in different words.
The game of Diplomacy is what is being questioned here - the site follows the rules of the game as well as it can, but draws are an integral part of the game. Many of the best players, including the man who created the game, argue that all games of Diplomacy should end in a draw. Draws are given in the rules, and the site follows the rules, so naturally, draws are included.
The point you make about causing it to be higher levels of play is possible, but that's ultimately a matter of opinion. What takes more skill - forming a solid 3-way alliance to force a stalemate against the game leader who is at 16 centers, or betraying those two allies and (somehow) getting all their centers to get to 18? That's a matter of opinion. I personally find no greater thrill in Diplomacy than rallying nations together to beat a juggernaut nation or two who are on the brink of winning." -
So airborne.... if you like playing for solos and you want to encourage this attitude in a game, you can set it as WTA in gamecreation. Or you can set up a "special rules game" (like no-stab or team games) and call it "no-draws" in which players commit themselves in not voting a draw unless there's a stalemate (as in the previous examples they commit to not stab or not betray their team). Or, again, you can set up the VC=half-1, so no 2-way draws. There's no need to have an odd number of SC.
Personally, I like maps where 2-ways are possible. If every result is possible then every strategy, whether diplomatic or tactic, is possible. Everything is possible! And the game is more... rich! More funny!
So creating a map with the explicit purpose to make a result impossible... it's a mistake I believe. It ruins the map. Draws are part of the game, map creators should leave to players the choice between allow all or forbid something. If you create a map with an odd number of SCs your diplomatic possibilities are rather limited (you don't promise a 2-way to your ally because you can't: you have no choice) and the games... will be missing something... will be less complex... and therefore it will be less funny.