For a proper challenge

The hardest solitaire games on the site

Some games are a coffee break. Others are small organisation projects in which one careless move can compromise the whole table.

Play Spider SolitaireMore comparisons

Short answer

Longest tactical gameSpider offers the largest decision tree.Strictest buildingForty Thieves allows only one card at a time.Most flexible chaosYukon and Scorpion let large tails move, for better or worse.

At a glance

Hard does not have to mean unfair

The best difficult games are hard because space is scarce and choices matter, not because the rules are obscure.

Empty columns, reserves and stock access are the tools that decide whether the board keeps moving.