What is mahjong impossible?

As an AI language model, I don't have any specific information about a game called "Mahjong Impossible," but I can provide some general information about the game of mahjong.

Mahjong is a tile-based game that originated in China and is commonly played in many Asian countries, including Japan and South Korea. The game is played with a set of 136 tiles, which includes four suits (bamboo, dots, and characters), honors, and jokers.

The objective of the game is to collect sets of tiles and form a winning hand. A typical mahjong hand consists of 14 tiles, and players take turns drawing and discarding tiles until one player completes their hand. The game requires strategy, skill, and a bit of luck, making it a popular pastime for people of all ages.

There are many variations of mahjong, including different scoring systems, sets of rules, and special hands. "Mahjong Impossible" might refer to a particular variation of the game with additional challenges or complex rules.