THE HEDGEHOG
Paranoia is the normal state of affairs for a Diplomacy Player. Combine with playing Austria and the slightest increase in insecurity and Austrian players may go for the Hedgehog Opening. Barring a German entry into Bohemia, this opening will make sure that Austria gets at least one build in 01 and has the option of being converted with Italian support into the destruction of the Austrian Fleet and its replacement by an army.
Spring 1901:
Army Vienna to Galicia
Fleet Trieste to Venice
Army Budapest to Serbia
In the fall the Austrians can cover both Vienna and Trieste while keeping Serbia so they are assured of a build. The Austrians can have the Italians who played to Tyrolia and Apulia dislodge Fleet Trieste and by refusing to retreat the Austrians build two armies. In the South the Army Serbia can be used to go to Bulgaria or Greece to curtail the Turks or even to support the Turks to Rumania for some more fun in the Balkans. The danger of the opening is that in the face of a Russian-Turkish alliance the Eastern Steamroller has a jump on Greece and the central Balkans, that and an Italy who might not be so forgiving as to the intrusion into Venice.