I'll utililize the Mozart's Folly Gambit as invented by Alphonso De Girolamo in 1785 and play Arsenal.
De Girolamo, I believe, came up with the name from a little known episode where Mozart, in one of his less lucid moments, explored the merits of venturing up the Arsenal and came to regret it.
All lines bar Piccadilly are now rendered out of bounds for 7 turns and Dimmock's are wild.