Play Double Blue Moon Solitaire Online — Blue Moon With Two Decks

Double Blue Moon is Blue Moon at twice the width. Two decks are dealt face up into eight rows of fourteen, the eight aces are moved to the left end of each row, and the eight gaps they leave are the whole game. A gap takes the card of the same suit one rank higher than the card to its left. When no move remains you may reshuffle the loose cards twice. Win by making every row read ace to king in one suit.

Setup

Shuffle two decks and deal all 104 cards face up into eight rows, leaving the first slot of each row empty. Then move each ace into a leftmost slot, one per row. The eight slots the aces came from are your opening gaps.

Rules

• Rows build up in suit from the ace in the first slot to the king.
• A gap takes one card: the card of the same suit one rank higher than the card to its left. A gap to the right of a king, or of another gap, is dead until a redeal.
• A leftmost gap takes an ace. After a redeal the first slot may be empty again; only an ace fills it.
• Twins: two decks mean two of every card, and either copy may continue a run. The other copy must find the matching row of its suit.
• The redeal: when no move remains, every card that is not part of its row's run from the first slot is gathered, shuffled and dealt back after the runs, leaving a gap after each run. Two redeals a game.
• Win when all eight rows read ace to king in one suit; the last slot of each row stays empty.

Strategy

Two decks make Double Blue Moon more forgiving than it looks. Every card has a twin, so a run blocked by a buried card can often continue with the other copy, and two rows share each suit. The cost is a board of 112 slots that must be read row by row.

• Read the runs, not the cards. Every row wants one suit in order from its first slot. Before any move, find the longest run each row already has and work to extend it.
• Never open a dead gap. A gap to the right of a king takes nothing. Moving a card away from beside a king leaves a slot that is lost until the next redeal.
• Prefer the move that creates a live gap. Where a card leaves matters as much as where it lands. Take it from a slot whose left neighbour is a low card with its successor still loose.
• Count the redeals. A redeal keeps the seated runs and reshuffles the rest, with a gap after each run. Seat as much as you can before spending one; what is seated is safe.
• Pair the rows by suit. Two rows will end as hearts, two as spades, and so on. Decide early which row takes which copy of a suit and keep the two runs from competing for the same card.
• Use a twin to unblock. If the next card a run needs sits beside a king, look for its twin; the run does not care which copy it gets.

Where It Sits in the Gaps Family

Double Blue Moon is the two-deck member of the Blue Moon line on the Gaps engine: the same aces-to-the-left opening and same-suit rule as Blue Moon, over eight rows. Paganini II is the same board with the aces left in play and no redeal; Double Montana removes the aces instead.

Other Games to Try

• Blue Moon — the one-deck original
• Paganini II — two decks, the aces in play, no redeal
• Double Montana — two decks with the aces removed
• Double Red Moon — two decks with the gaps dealt beside the aces

About This Online Version

Double Blue Moon runs in your browser — free, no download, no sign-up. Install it as an app on your phone or computer and it works offline. You get unlimited undo, a hint button that names a legal move, statistics that track your wins and times, and seeded deals: every game has a seed you can replay, so a board you enjoyed (or lost) can be played again exactly.