http://www.chesselo.com/16-checkmate-puzzles.pdf
http://www.uiltexas.org/files/academics/aplus/ChessPilot_sample.pdf
Thanks Cockam
This one has customizable chess puzzles that are downloadable as PDF - https://chessgo.in/puzzles/
If you need help, please contact our Help and Support team.
http://www.chesselo.com/16-checkmate-puzzles.pdf