Which of the following sentences correctly uses a semicolon with a conjunctive adverb?

Chinese checkers has no connection with the game of checkers; furthermore, it was actually invented in Germany in 1892.
Chinese checkers has no connection with the game of checkers, furthermore; it was actually invented in Germany in 1892.
Chinese checkers has no connection with the game of checkers; Furthermore, it was actually invented in Germany in 1892.
Chinese checkers has no connection with the game of checkers; furthermore; it was actually invented in Germany in 1892.

Chinese checkers has no connection with the game of checkers; furthermore, it was actually invented in Germany in 1892.