Napoleon's Retreat Form Moscow--A Very Nice Puzzle

Russian champion Alexander Petrov composed this study in 1824. Galloping Cossacks chase Napoleon from Moscow (b1) across the Berezina (the long white diagonal) to Paris (h8), “where the Czar achieves his victory, by a ‘check by discovery’.”
NOTE: There is a mate in 6 moves, BUT that is NOT the goal. The goal is to chase Napoleon back to Paris (h8) and mate him there. 
HINT: This is accomplished in 14 moves with Napoleon forced to move with each move. White to move......