Chess Puzzles and Tactics

Mate in 4 chess puzzles

Chess Puzzle #17 | Black to move and Win, Find Checkmate in four moves.
Chess Puzzle #362 | White who has the move. What should he play? Mate in 4 moves.
Chess Puzzle #438 | A chess puzzle from a game of Grandmaster Abdullah Al Rakib. Black to play, checkmate in four moves.