Mates that are difficult for engines

You're not going to believe this, but it's another day... and yet another mate that engines can't solve:

Mate in 51:

Oh no! another mate that engines can't solve!

Mate in 24:

Another mate that gives engines indigestion.

White to move and mate in 75:

Don't look now, but here is yet another mate that gives engines constipation:

White to move and mate in 24:

Another day, another tough mate for engines.

White to move and mate in 21:

This is one of the few ones where I don't actually understand the moves, they all almost look random.

You're in great company, because the engines don't either.

OK engines, I'll take it easy on you...Here's a mate in 12.

White to move and mate in 12:

SOMEBODY PLEASE TELL ME; IS THIS A DRAW?????

It's a win for white, so no, it is not a draw.

Here's a PGN of this easy win:

I don't see how white can make any progress.

Well then refute my PGN.

give me the line where the bishop never moves

The white queen can probably corner the black king in a corner or on the edge, forcing the bishop to move which it would then get forked. And if the bishop moves before hand then the queen may be able to fork the pawn, not sure though. Theres also the fact that white could even sac the queen for the bishop somewhere else on the board and possibly be able to queen the pawn. Even without the white pawn its probably a win since a Queen will always win against a lone bishop. I know this is the defensive fortress for KQKBN:

The Bishop is FORCED to move eventually.

show

Here you are, now refute it (which you can't).

I was wrong. For the human eye, it looks impossible to win. Just checked the TB and it's actually not hard at all.

ok ok ok

how about this position tho?

Another easy win for white, so easy an engine could solve it.