Grid & sequence puzzles · The Tileworks
Deal all 52 cards into 4 rows of 13. Remove the Aces to create gaps, then slide cards into gaps to build each row from 2 to King in the same suit. You have 3 redeals to help you finish.
Select a card to move it, or press Redeal to reshuffle.
Addition Solitaire (also known as Gaps or Addiction) is a layout-repair game with a distinctive approach: rather than building sequences onto foundations, the goal is to rearrange the tableau itself into four perfectly ordered rows. All four Aces are removed to create four gaps, and the rest of the game consists of using those gaps to shuffle cards into the correct positions — each row ultimately containing 2 through King of one suit, in order from left to right.
The 52-card deck is dealt into four rows of 13 cards. The four Aces are removed, creating four gaps. A gap can be filled by the card one rank higher in the same suit as the card immediately to its left (e.g., a gap to the right of 5♥ can receive 6♥). No card can be placed to the right of a King — gaps next to Kings are dead ends.
A redeal shuffles cards outside correctly ordered left-edge prefixes back into the layout, re-creating gaps. You may redeal even while legal moves remain. Up to three redeals are allowed. Win when all four rows read 2 through King in the same suit.
Each gap is a resource. The card to the left of a gap determines what can fill it. Moving a card into a gap shifts the gap to where that card came from, potentially enabling a chain: the new gap’s left neighbor may allow another card to slide in.
Good Addition play checks the new gap before each move: moving 6♥ into a gap after 5♥ opens a gap where 6♥ stood. The card to the left of that new gap determines what can fill it. Planning three to five gap-moves ahead before executing prevents the common mistake of creating dead-end gaps next to Kings prematurely.
A gap immediately to the right of a King is a dead gap — nothing can fill it because no card is one rank above a King. Dead gaps consume one of the four available gaps permanently until a redeal reshuffles the layout.
Avoiding dead gaps is a core discipline in Addition. Before moving any card, check whether the new gap position it creates is adjacent to a King. If it is, the move may be burning a gap resource for no benefit. Dead gaps are why redeals are necessary — they appear through unavoidable chain effects — but minimizing them extends how much progress each deal phase achieves.
Addition is part of The Tileworks · Grid & sequence puzzles and is a variant of Gaps.