Solitaire simulator for finding the best strategy: Current record is 8.590%

Per [1] (found via wikipedia) 35% is possible!

[1] https://web.archive.org/web/20210924183919/https://www.aaai....

Isn't 8.5% low?

My mom didn't use the computer much except she did play solitaire on her Windows laptop all the time. She had over a 2000 game win streak until she got dementia and stopped using the computer altogether.

I love seeing this. Klondike with a physical deck was my “I need to do something with my hands or I’ll go crazy” release valve during the pandemic after work. I thought about trying to build something like this, but it was far outside of my technical ability. I settled for a simulator that would run toilet solitaire so I could see the distribution of cards remaining after games with a well-shuffled deck.

What is 8.590% of what?