Microsoft did not include Solitaire or MineSweeper in Windows 10, instead you can get Microsoft Solitaire Collection. This is Microsoft’s attempt at making solitaire into a service that you will pay for. You will either pay a fee to get an ad-free experience or get bombarded with obtrusive advertising. To top it all off you need a Microsoft Account to use it. Who would have ever thought that you would have to pay to play something computer users have enjoyed for free for so long. Microsoft Solitaire Collection is a bad joke.
Fortunately it works on Windows 10 and has more than a thousand solitaire games, including Mahjong Solitaire. The interface is intuitive and the games work.
Disclaimer: I do not play Solitaire and am not qualified to review PySol’s quality in regard to game-play.
PySol is under the GPL and can be modified and improved. If you know a little bit of Python and love Solitaire I encourage you to bring the project back to life as no one wishes to give Microsoft any more than they must.
PySol can be downloaded from Sourceforge here.