Simple Simon (solitaire)

A sequence of cards, decrementing in rank and of the same suit, can be moved as one.

A sequence of cards from the king down to the Ace - all of the same suit - can be moved to the foundations.

Note that some implementations of Simple Simon, require the player to do all the moving of the individual components by himself.

[2] Another programmer added another type of move which reportedly increased the percentage of games that were solvable by the solver to well over 90%.

[4] The comment has been made that this is "what makes the game a joy: either it's impossible to solve and you see it in the first moves or it's solvable and you only have to find the best route.