Solitaire

Same as classic Klondike but you flip three cards from the stock at a time, only able to play the top card of each flip. Adds a layer of planning — you can see what's coming but can't always reach it.

A strategic variant from Zachtronics' Last Call BBS. All tableau cards are dealt face-up so you can plan ahead — but the deck only goes through once. When the stock runs out its spot becomes a free cell for temporary storage. Cards on foundations cannot be taken back. Less luck, more thinking.

A one-player cribbage variant played across four deals. Each round gives you two six-card hands: discard two cards from each into the crib, reveal a starter, then score both hands and the crib using standard cribbage rules - fifteens, pairs, runs, flushes, nobs, and heels.