CheckMate in two moves

Hello all,

I am new to the cite and am hoping that you guys and gals can lend a hand. I just started recenly studying chess for a Philosophy class that I am taking and the professor has challenged us with a problem that I am unable to solve. The Goal is to have white perform checkmate in two moves with white moving first. The issue that I keep running into is that the professor has told us we should move the Bishop on c2 first. So to cover the most amount of ground I move it to b3 allowing the King on e3 to advance to d3. From there though I can't find a way to move the Knights to make a checkmate move. If anyone has some insight or can even point me in the right direction it would be greatly appricaited.  Here is the scanario: Arrange your chessboard accurately as follows: White: K-e1; B-c2; N-f3; N-d4; Black: K-e3; Pawns e4, f4

Thanks all. 

Bishop to b1 is the move. Black has to capture the N on f3. Then White mates with Nf5.

ahh all makes sense now haha. Thank you very much for you help with this! :)