Clear the pile by matching free tiles in pairs. A tile is free when nothing sits on top of it and one of its sides is open.
Real mahjong tiles, a proper layout, and a shuffle for when the board stalls.
Click a tile, then click a matching one, and both leave the board. Tiles match when they show the same face.
Only free tiles can be taken. A tile is free if no tile covers any part of it and its left or right edge is clear.
The flower tiles match any other flower, and the four season tiles match any other season, which is the one exception to the matching rule.
Clear every tile to win. The hint button points out a pair, and shuffle rearranges what is left when nothing is available.
Nothing on top of it, and at least one of its long sides open. A tile wedged between two others with a clear top is still stuck.
Yes. Any flower pairs with any other flower, and any season with any other season. That is standard in mahjong solitaire.
Use the shuffle button. It rearranges the remaining tiles so the board can continue, and it is part of the game rather than a cheat.
The board is dealt so a solution exists, but taking the wrong pair can still strand tiles, which is what undo is for.
Mahjong Solitaire is not really mahjong. It borrows the tiles from the four player Chinese game and turns them into a patience puzzle, and it spread worldwide through computer versions in the 1980s.
The skill is in the order. Taking the pair that frees the most tiles underneath beats taking the pair you spotted first, and clearing the long rows early stops the board locking up.
Tiles that appear four times are worth thinking about. Taking the wrong two of the four is the usual reason a board ends up stuck.