Discovered attack

These puzzles are purely beginner puzzles and meant to teach tactics.

This tactic is called 'discovered attack '. Can you figure out what is a good strategy in the following puzzle?

The key feature here is that when one is in check, one must get out of check before one can defend. Another option is bischop to e1, it is very similar. Of course, do realize that it really depends on the situation whether this is helpful. For example, if one would put the bischop at the b4-square, then there is no real threat for black, it can simply move its king out of check and in general bischops are better than knights so no big deal. Of course this depends on your opinion and viewpoints as well, enlighten me if you think that that could be a good strategy

Be1

King is now under attack from the Rook and Queen from the Bishop, they have to move the King so you get the Queen.

Oh yes, I forgot about that. That is indeed another possibility. In the puzzle, the answer is Be3 but that is just as valid