I can manage check in 2.

Use the double move: BF4QE5

Checkmate in one!

I have managed to find a checkmate in 0. It is hard to explain but this is actually quantum checkmate.

Mini fools mate

I move the concrete block on e4 to e5, thus checking the king, but the concrete block cannot be killed. Therefore, this is checkmate.

The knight jumps onto the C3 concrete block. Black is startled by white breaching into the third dimension and can't move. Then knight to E4 is checkmate.