Great "solitaire like" game, a nice refreshing view on Chess game which is also fun and a little challenging, some levels are pretty easy, I just have to beat the tricky level 50.
For those who like this kind of puzzle, there was a long long time ago a game called 'Peg It' from Shoecake Games which was released for free after a few years but unfortunately, the author remove it + his other games from his website. It is a very very challenging solitaire game, the kind of game you can't really play all the day I guess cause your brain will explode otherwise :D.
There are a few links available still : one, another one and this one.