Mate in N Puzzles for the iPhone, iPod Touch, and iPad

500 Chess Puzzles, Mate in 5, Advanced & Expert Level: Solve chess problems and improve your tactical chess skills (I'm progressing in Chess)

The Chess Files: Mate in 2, 3 or 4? – The U.S. Chess Trust

Hardest Checkmate in 1 - Chess Forums

Mate in 3 Chess Puzzles

500 Chess Puzzles, Mate In 2, Beginner And Intermediate Level

500 Chess Puzzles, Mate in 4, Advanced Level: Solve chess problems

500 Chess Puzzles, Mate in 2, Beginner & Intermediate Level: Solve

Mate in 3 !! - ( Medium level ) - Chess PUZZLES tutorials ep8

Mate in Three Moves - Chess exercise book for chess players - 500

Betcha Can't Solve This #Chess Puzzle! 61 – Daily Chess Musings