This is an interesting question, but the answer is quite simple.

As long as Bismark is within range of Yamato, the winner would be whoever got the first hit on the other! I believe that one solid hit from either of these ships wouls knock the other one out!

My personal feelings on this scenario. I feel the Yamoto would win because of its bigger guns, and therefore better range. As long as they could hit Bismark, the German ship would probably not even get a shot off! Bismarks only hope would be to manuver (zig-zag) in to get close to get off a volley. Otherwise Bismark will go down.

Matt