Mahjong Solitaire Rules

These Mahjong Solitaire rules cover the standard digital puzzle: clear a stacked layout by removing matching pairs of free tiles. They apply to classic turtle boards, Shanghai-style desktop games, and modern scenic apps that use the same core logic.

Want the rules in a live app? Download ZenCraft Mahjong Solitaire on iOS or Android, then return here when you need a precise reference.

Setup

• A full set usually has 144 tiles drawn from traditional mahjong faces.
• Tiles are arranged face-up in a layered layout (turtle is the classic).
• Some easier modes use fewer tiles or more open edges so more pairs start free.
• Faces typically include three suits (bamboo, circles, characters), winds, dragons, flowers, and seasons.

Objective

Remove all tiles from the board. You win when none remain. You lose a deal (or reach a stuck state) when no legal free matching pair is left, even if tiles remain on the board.

There is no opposing player, no discard pile, and no hand to complete. The only victory condition is an empty layout.

Free tile rule

A tile may be selected only when it is free:

1. No tile rests on top of it.
2. At least one lateral side (left or right) is open so the tile could slide out without disturbing neighbors.

Tiles blocked on both sides, or covered from above, are locked until those blockers are removed. Vertical stacking and side blocking are both part of the puzzle geometry. Front and back edges do not unlock a tile in the classic rule set — only left/right openness matters for the lateral check.

Overlap is geometric, not visual guesswork. If a higher tile covers any part of a lower tile’s footprint, the lower tile is blocked from above.

Matching rule

Remove tiles two at a time according to these match rules:

• Exact match: suits, ranks, winds, and dragons must show the same face.
• Flowers: any flower matches any other flower.
• Seasons: any season matches any other season.

There are typically four copies of each numbered suit tile and each honor. Flowers and seasons form special four-tile groups that mix within their category. See tile meanings for the full set.

Flowers do not match seasons. A green dragon does not match a red dragon. Similar art is not enough — the face identity (or the flower/season group) must be legal.

Turn structure

On each turn, choose two free tiles that form a legal pair and remove them. Newly exposed tiles may become free. Continue until the layout is empty or no move remains.

Classic digital Shanghai-style games remove the pair immediately from the board. Tray-based variants (including ZenCraft Mahjong Solitaire) still respect free-tile selection: you pick free tiles into a tray, and matching pairs clear when they sit together according to the game's tray rules. Both styles are Mahjong Solitaire if free geometry and pair matching remain the heart of play.

Solvable deals vs. random deals

Older random shuffles can create impossible boards. Many modern games reverse-construct deals so a complete solution exists: the generator removes free pairs while assigning faces, then plays that sequence backward as the starting layout. Solvable does not mean automatic: a poor removal order can still strand tiles. Undo exists so you can backtrack when a branch fails.

If an app advertises “every board is solvable,” treat that as a promise about the deal, not about any specific path you choose.

Common house rules in apps

• Hint highlights a legal pair.
• Undo restores the previous removal.
• Shuffle re-deals remaining tiles into a new solvable state.
• Timers, scores, daily puzzles, and themes are optional layers, not core rules.
• Some games highlight free tiles; others expect you to read the board yourself.

What the rules deliberately exclude

Mahjong Solitaire rules do not include chow, pung, kong, mahjong hands, dice, walls dealt to players, or betting. Those belong to traditional Mahjong. If you need the comparison, read Mahjong Solitaire vs traditional Mahjong.

Tile counts in a standard set

A classic 144-tile set usually includes four copies of each suit rank across bamboo, circles, and characters (three suits × nine ranks × four copies = 108), four copies of each wind and dragon honor, plus four flowers and four seasons. Digital layouts may omit tiles for shorter boards, but the matching categories stay the same whenever those faces appear.

Shorter practice boards simply use fewer pairs. The free-tile rule and match rule do not change when the count drops from 144 to a compact teaching layout.

Edge cases players argue about

• Diagonal neighbors: diagonals do not free or lock a tile. Only same-layer left/right adjacency and vertical cover matter.
• Partial cover: any overlapping footprint from a higher tile locks the tile below, even if most of the face is visible.
• Identical flowers: unnecessary. Any flower pair is legal.
• Three free matching honors: you still remove only two per turn. Choose which pair based on what unlocks next.

Win, stuck, and restart conditions

You win only when zero tiles remain. A stuck state means tiles remain and no two free tiles form a legal match. Restarting abandons the deal. Some apps blur stuck and loss with shuffle prompts; strictly speaking, shuffle is a house-rule recovery, not part of the original tabletop-style computer rules.

If you are comparing two apps, check whether they label shuffle as an assist. A game that auto-shuffles without asking is still Mahjong Solitaire, but it is playing a softer competitive contract than a game that makes you press Undo or admit defeat.

Teaching boards can also end early when a player chooses to stop. That is fine for learning. Competitive clear challenges should define whether assists are allowed before the run starts so results stay comparable.

How digital assists interact with rules

Hint does not change legality; it only reveals a pair that already satisfies free-tile and match rules. Undo restores a previous legal state. Shuffle rebuilds remaining tiles into a new arrangement — often still solvable — and should be treated as a new deal rather than a continuation of the old solution path.

Score multipliers, daily streaks, and cosmetic themes sit outside the rule core. You can ignore them entirely and still be playing correct Mahjong Solitaire.

Quick reference card

1. Only free tiles may be selected.
2. Free means uncovered and left-or-right open.
3. Remove legal pairs until the board is empty.
4. Exact faces match; flowers match flowers; seasons match seasons.
5. Solvable deals still require good order — Undo is part of play.

Print that list mentally before every new layout. Most disputes about “broken boards” are actually free-tile misreads or match-rule mix-ups, not generator bugs.

Related reading

New to the genre? Start with how to play Mahjong Solitaire. Ready to practice? Download ZenCraft Mahjong Solitaire. For naming history, see Shanghai Solitaire. For move order after the rules feel solid, continue with strategy tips.