The Blogspot Chess Game Viewer can also be used to display chess puzzles of which the solution has to remain hidden as long as the right answer hasn't been given.

As an example a Mate in two problem. After five attempts or after making the right move the solution will become visible. You can make a move by clicking at a piece followed by clicking the target square.



The code in this post used to display this mate in two diagram will be shown in a couple of days.