The aim of Mahjong is to complete a hand before any other player does. The most common method of completing a hand is to collect four sets of three tiles – either “Three-of-a-Kind” or “a Run-of-Three” – and a “Head” of two similar tiles.
Each tile within a set of three must be of the same type – the same suit, the same dragon, or the same wind. For example:
A hand can consist of a mixture of sets, so a completed hand of 14 tiles might look like this: