The game is cool with a few bugs, like the cards freeze and disappear when moved. Most annoying are the ads especially the anti Hilary ad about “new” emails discovered! Is this a republican game or Russian bot game? Very annoyed.
Yukon is a classic solitaire. The goal is to move all cards to the four foundations at the right by suit from A to K. You can move a group of cards to another tableau pile if the starting card of the group is in alternate color and of an immediate lower ranking with the top card of the other tableau pile. An empty tableau pile can be occupied by a K or a group starting with a K.