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Calculation (also known as Broken Intervals,[1] Hopscotch[2] and Four Kings Solitaire[3]) is a solitaire card game played with a standard pack of 52 cards.[4] It is part of the Sir Tommy family of patience games. It has its origin in France, where it is known as La Plus Belle.[5]
It offers more scope for skill than many similar games; a skilled player can win Calculation more than 80% of the time when "normal play" can allow winning 1 in 5 times.[6] Good strategy typically sees players use 6s, 8s, and Queens early and 10s, Jacks, and Kings later; clever placement of cards in the waste is also critical, with some players reserving one waste pile for the Kings. [7] Every game of Calculation Solitaire is winnable.[citation needed] The key is to focus on putting cards in the 'waste piles' in reverse order.
- ^ "Calculation" (p.226) in The Complete Book of Card Games by Peter Arnold, Hamlyn Publishing, 2010. ISBN 978-0-600-62191-1
- ^ "Gnome Help - Aisleriot - Hopscotch". 30 August 2015. Retrieved 14 May 2016.
- ^ "Four-Kings Solitaire". 2003. Retrieved 11 April 2018.
- ^ "Calculation" (p.314) in Bicycle Official Rules of Card Games by Joli Quentin Kansil (ed.), 1999. ISBN 1-889752-06-1
- ^ "Calculation" (p.135) in The Playing Card Kit by Richard Craze, Simon & Schuster, 1995. ISBN 0-7318-0526-7
- ^ "Calculation" (p.209) in Hoyle's Rules of Games (3rd edition) by Philip D. Morehead (ed.), 2001. ISBN 0-451-20484-0
- ^ "Calculation" (p.80-81) in 101 Great Card Games by David Galt, Publications International, 1999. ISBN 0-7853-4044-0