Yukon

Yukon solitaire rules

Goal: Build cards upward (place cards one on top of another in ascending sequence, e.g. from Ace to King) in each of the four foundation piles.

Rules: Each foundation pile can hold only one suit cards build up from Ace to King. Groups of cards can be moved between piles if the starting and target cards built down in descending order and in alternate color, the other cards in group to be moved do not need to be in any order.

Difficulty: Easy - any card or sequence can be placed in empty tableau spaces, Hard - only Kings or sequence started with the King can be placed in empty tableau spaces.

Wikipedia: Yukon