High Seas Duel

High Seas Duel is a side challenge in Commander's Challenge.
==Briefing==
The Imperial Commander Takara has issued a formal duel, following the old traditions of the Empire of the Rising Sun, and is waiting to do battle against you here in the middle of the sea... She must like you! At any rate, she seems to know our gambit at this point, and has anted up with the Empire's own Shogun Battleship. You wouldn't want to disappoint her now, so please proceed with care. The technology found in the Shogun Battleships' cannons will be an excellent acquisition.
==Background==