Short answer
At a glance
FreeCell
- Rules
- medium
- Time
- About 10 min
- Luck
- 1/5
- Strategy
- 5/5
Spider Solitaire
- Rules
- hard
- Time
- About 15 min
- Luck
- 3/5
- Strategy
- 5/5
Forty Thieves
- Rules
- hard
- Time
- About 18 min
- Luck
- 4/5
- Strategy
- 5/5
Bjørnar Solitaire
- Rules
- hard
- Time
- About 12 min
- Luck
- 3/5
- Strategy
- 5/5
Scorpion Solitaire
- Rules
- hard
- Time
- About 12 min
- Luck
- 3/5
- Strategy
- 5/5
Yukon Solitaire
- Rules
- hard
- Time
- About 12 min
- Luck
- 3/5
- Strategy
- 4/5
Strategy is really about space
Many games are won not by one special card but by an empty column kept available at the right moment.
The strongest strategic variants reward patience, board reading and keeping several futures alive at once.