Skillz
21 Blitz
SkillzTether Studiosfour-column blackjack solitaire
What it is
Cards are dealt one at a time into four columns. Clear a column on exactly 21 or five cards. Games are scored head-to-head against a clock on Skillz.
Where we stand
Cards are dealt into four columns; clearing on exactly 21 or five cards drives score. Bust-out math and clear-vs-hold timing are the central decisions.
Full strategy guide$9Practice free in Column 21Related games
Other titles in the four-column blackjack solitaire family. Strategy principles transfer, though exact rules and scoring vary by title.
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Research status
published
Cards are dealt into four columns; clearing on exactly 21 or five cards drives score. Bust-out math and clear-vs-hold timing are the central decisions.