Zero21

Zero21 is a number-card puzzle with a solitaire flavor. Your task is to collect the cards shown on the board while keeping your running total inside the range from 0 through 21.

Every card changes the sum, so a move that looks useful can also push the total outside the safe range. The game combines simple arithmetic with card selection, creating a thoughtful way to keep your mind active while clearing the board.

Select number cards from the board to collect them.

Track your current sum after every card you take.

Keep the total at least 0 and no higher than 21.

Continue choosing cards until the available board cards have been collected.