Online Chess Puzzles 20-22

Here are three new chess puzzles that I know you will find challenging. As usual, I have included one for beginner level players, one for intermediate level players and one for the advanced players. All puzzles begin with white to play. Good luck!

Chess puzzle #20 is a
beginner level mate in 1.

Chess puzzle #21 is an intermediate level mate in 2
that has two answers. See if you can find both.

And, chess puzzle #22 is an
advanced level mate in 3.

Again, best of luck and look for the correct answers in my next post!