A game of Pegs.
The idea is to jump over pegs until there is only one left. The blue dots are pegs. You can only jump over a peg if the pegs are next to eachother. The peg that is jumped over is removed. Diagonal jumps are not allowed. To jump over a peg, click on the side of the square containing the peg that will do the jumping - in the direction which you would like it to jump.
Nomad - a very challenging version of a peg game.