I dont think you can
multiple puzzle solutions

You can do this using the Chess.com diagram editor - http://www.chess.com/article/view/how-to-use-the-chesscom-diagr

You can do this using the Chess.com diagram editor - http://www.chess.com/article/view/how-to-use-the-chesscom-diagr
okay, but the puzzle will only take one solution even when I add two variations
how do you give your puzzle more than one solution?
say there are two moves that can each give check mate