"Jump over the marbles to make them disappear."
Marble Solitaire is a game featuring marbles of the same colour, which you have to make disappear until there is just one left on the board. To remove each marble you have to jump over it (horizontally or vertically) with another, always and only when there is another space available to land in.
What at first glance seems a simple challenge is in fact not so easy. In Marble Solitaire to move the marbles, block others or slow them down is what you have to do, so you need to think about each of your moves. If you make a wrong move, don`t worry, as you can undo it.
In Marble Solitaire you have 25 different boards to choose from. You can even design the board yourself if you get bored of those in the game.