FreeCell

One standard 52-card deck is used.
There are four open cells and four open foundations. Some alternate rules use between one and ten cells.
Cards are dealt face-up into eight cascades, four of which comprise seven cards and four of which comprise six. Some alternate rules will use between four and ten cascades.

Moves
Any cell card or top card of any cascade may be moved to build on a tableau, or moved to an empty cell, an empty cascade, or its foundation.
Complete or partial tableaus may be moved to build on existing tableaus, or moved to empty cascades, by recursively placing and removing cards through intermediate locations. Computer implementations often show this motion, but players using physical decks typically move the tableau at once.

Rules
Cards can be placed on the table in descending order and in alternating colors. On the foundation, cards can be placed only in ascending order on the corresponding family. The 4 cells on the top can only contain one card at a time.
You can move as many cards (which are in a correct sequence) at once, as there are free stacks (tableau and the cells) available. This corresponds to the rule, that only one card can be moved at once, but when there are free stacks available, the cards can be moved on the free stacks first and then to the destination stack.
Every card can be placed on empty table fields and cells. Acess can be placed on empty foundation fields.