Solo games played as a duel

Puzzles built for one person, dealt once and then played by two. Solitaire, Sudoku and Sliding Puzzle put a single board between both seats and alternate the moves, so a card sent to a foundation or a square answered correctly is a square the other player no longer has. Most take ninety seconds; Maze Paint is the short one at forty-five.

7 games, played by two people on one device.