In calculation solitaire cards are moved to the foundation by multiple of a number associated with each foundation pile. The first foundation pile is built up by a multiple of one, second foundation pile by a multiple of two, third foundation pile by a multiple of three, and fourth foundation pile by a multiple of four regardless of suit. All foundation piles end up with a King.

Four foundation piles end up in following order.
A, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K
2, 4, 6, 8, 10, Q, A, 3, 5, 7, 9, J, K
3, 6, 9, Q, 2, 5, 8, J, A, 4, 7, 10, K
4, 8, Q, 3, 7, J, 2, 6, 10, A, 5, 9, K

Initially one card each is dealt to four foundation piles corresponding to its multiple. Remaining cards form a stock pile and there is one waste pile which can only keep one card at any time. Four tableau pile can be built up in any order and only top card on a tableau pile is available for play.

This solitaire is a game of skill in which a skilled player can win 80% of the time. Try this solitaire for your brain exercise.

Features
- Clean interface
- Save game state to play later
- Unlimited undo
- Game play statistics