This is a very easy solitaire to play, but very difficult to win - I've never won and I think Kais has done it once. The best I've done is gotten it down to three piles, the goal being to get all the cards into a single pile.
This is how it works. You have all the cards shuffled and in your hand. One at a time, you take the top card and flip it over and lay it down next to the card you just layed down, in a row. If the card you lay down is the same number or suit as the card next to it or as the card three cards down, you can take the new card and put it on top of the one it matches. If it matches both the card immediately adjacent to it AND the third card up, you get to pick where it goes. And by "third card over", I mean you skip cards one and two and put it ON THREE, no exceptions.
When you move a card, you move all the cards that are under it as well, so you are slowly combining piles in an effort to get all the cards into a single stack at the end. By moving a card/stack to a new spot, you might create a chain reaction of cards/stacks that can now be moved. Sometimes you can move more cards depending on which order you move them in if a chain reaction comes up, so pay attention to see how far you can condense your cards.
That's it. You go til you've exhausted the deck. If you do absolutely terrible, you might end up taking quite a bit of space with all the cards.
This is a wonderful version of solitaire, if you have the room for it. A lot is left up to luck but it's a nice way to while away time while listening to music.