Credits

Soliteur was created by Tom Burzynski.

Playing Cards#

The classic card style uses vector playing card graphics by Chris Aguilar, licensed under LGPL 3.0.

Modern card fronts use Plastic Playing Cards graphics by Gifford Cheung, licensed under CC BY 4.0.

Research#

The difficulty ratings for FreeCell daily challenges are calculated using methods informed by the following research:

• Chen, Michael W.H. “The Hardness Analysis of FreeCell Games”. BSc Thesis, University of Amsterdam, 2015.
• Demaine, Erik D. and Hearn, Robert A. “Games, Puzzles, and Computation”.