Tiles: 144
Score: 0
Time: 0:00
Free online mahjong solitaire rewards careful order more than speed — and unlike download-only clients, Mosaic loads instantly in your browser. The most common mistake is matching the first free pair you see; the better habit is to scan all four copies of a tile type before committing. If three of the four are buried under upper layers and only one is currently free, removing the wrong pair early can strand its twin under a stack you can no longer reach. Free a tile, then check whether its match is also free and whether either was unblocking something more valuable underneath.
Keep an eye on the upper layers. The emperor tile on layer six and the tiles directly beneath it tend to be the last to open up, and a board can look comfortable until you realise four matching characters are buried in the central pillar with no path down. Whenever a layer-three or layer-four tile becomes free, prefer matching it first so its weight is removed from the stack. Flowers and Seasons are wildcards within their groups — any flower matches any other flower, and any season matches any other season — so use them to defuse a stuck stretch rather than hoarding them. Save hints for genuine dead-ends; a single hint costs fifty points and breaks your combo streak, while the streak itself can compound into far more than the hint refunds. Other tile-removal games on the site explore the same plan-ahead pressure with different rule sets — try our other browser puzzle games if you enjoy this kind of board-clearing.
Each layout in Mosaic changes how stacking and free-tile detection feel in practice. The Classic turtle is the canonical 144-position Shanghai shape — broad base, narrowing peak, two wing tiles flanking the body. Pyramid trades the wings for a clean tapering pile that funnels every late match through the centre. Dragon spreads tiles along a long serpentine spine, which means more first-move options but harsher punishment for matching out of order on the ends. Fortress wraps an outer wall around an inner keep, so the early game opens edges while the late game forces you into the keep through narrow doorways. Daily reuses the Classic shape but pins the shuffle to today's date, so every player worldwide gets the same tile arrangement. Whether you're a Shanghai mahjong veteran or new to tile-matching games, each layout teaches a different cadence.
Daily Challenge mode replaces the random shuffle with a seeded Mulberry32 pseudo-random generator keyed off the current UTC date. The board is identical for every player on the same day, the daily leaderboard uses a per-day key so it does not mix with the standard high-score table, and your completion is stored locally so you can see your streak the moment you load the page. Mosaic shares a logic-and-deduction sensibility with the rest of our logic puzzle collection on the site, including Hanjie nonograms. The 36 tile types in Mosaic follow the standard mahjong set: nine bamboo, nine circles, nine characters, four winds, three dragons, four flowers and four seasons, four copies of each suited tile, with flowers and seasons matching by group rather than by exact tile.
Most mahjong solitaire sites on the web are either ad-saturated portals with dated tile art or download clients that ask for an install before you see a board. Mosaic loads instantly in the browser and rebuilds the genre's visuals from scratch: pastel vapor-aesthetic tiles on a luminous stone board, drawn to stay readable even when six layers deep. Under the surface, the rules are the faithful ones veterans expect — 144 tiles, the strict free-tile test (nothing on top, one side open), flowers and seasons matching by group — but the scoring layer is Mosaic's own. Combo streaks compound at 50 bonus points per consecutive un-hinted match, hints carry a real 50-point cost that also breaks the streak, and a time bonus rewards clean fast clears, so the same board supports both a meditative pace and a score-chasing one.
The mode structure goes further than the typical single-shuffle web version. Three difficulty tiers change the tools, not just the deal — Easy grants three free shuffles and full tile reveal, Normal prices shuffles at 200 points, and Hard removes shuffling entirely, doubles hint cost, and hides the timer until the last two minutes. Five layouts (Classic turtle, Pyramid, Dragon, Fortress, and the seeded Daily) each force a different clearing order, and the Daily Challenge pins its shuffle to the UTC date so everyone in the world races the same board, with streaks tracked locally and a per-day leaderboard kept separate from the all-time table.
The tiles come from mahjong, the classic Chinese four-player table game whose suits — bamboo, circles, characters, winds, dragons, flowers, and seasons — Mosaic reproduces exactly. The single-player matching game, though, is a computer-age invention: pair-matching tile solitaire took off on home computers in the 1980s, when the game widely known as Shanghai popularised the format and made the turtle-shaped 144-tile layout the genre's canonical board. That turtle shape — broad base, narrowing peak, lone tiles capping the pile — survives here as Mosaic's Classic layout, and the reason it endured is the same reason the genre did: the free-tile rule turns a simple matching exercise into a planning problem, where every pair you remove reshapes which tiles you can reach next.
