I am one of the creators of the Clevergoat suite of games. We currently have 7 games and have launched a new game in beta (we call it labs).
It is called TAKES - A Daily Chess Solitaire Game.
Rules:
Capture all pieces on the chess board. If a King is present, it must be the final capture.
There are four difficulty levels, expert mode is unlocked when completing easy, medium and hard. There are three games per difficulty, except expert, there is one.
If you get stuck, you can use a hint. Try and get the best time as you can.