Checkmate only legal move

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magnus7277
Idea: to make a position such that the only legal move is to checkmate your opponent, a "forced" win (assuming you don't let time run out of course).
 
After trying for about half an hour I came up with this. White to move.
 
 
Nordlandia

In case white runs out of time before Be2# it's a draw because black cannot win by any means.