You will find a new mate in one problem each time you visit this page (or after a refresh of this page). After giving the right solution or after three wrong answers the solution is revealed.
You can make a move by clicking on a piece and dropping it at the target square.

The white (or black) circle indicates that it's white's (or black's) turn to move. All diagrams are mate in one puzzles. Some are easy and some are a little bit difficult. Or do you prefer the mate in two problems or the mate in three problems?