Curiously, Italy can maintain his blockade using only three fleets by backing up to the Tyrrhenian Sea and allowing France into the Gulf of Lyon. However, the new arrangement requires an additional army in Tuscany.
Italy: Army Piedmont HOLD.
Italy: Army Tuscany SUPPORT Army Piedmont .
Italy: Fleet Tyrrhenian Sea SUPPORT Fleet Western Mediterranean.
Italy: Fleet Western Mediterranean HOLD.
Italy: Fleet North Africa SUPPORT Fleet Western Mediterranean.
This position is impenetrable, and is an example of a portion of a stalemate line. Stalemate lines are discussed at length in Stalemates A to Y, which has now been republished in The Diplomatic Pouch. See Position 1 and Position 1a in the "The Gamer's Guide to Diplomacy: Stalemates" for further discussion of these positions.