Default board size with default tile set (Version 1.8.4, 2013)
Playing with gravity (the default) let stones fall into wholes created by removals
Stuck: by default not only solvable boards are generated
Removals (or hints) are marked with a red line.
Game options: gravity, "Chinese mode", board size and difficulty can be set to your personal preferences
Playing without gravity: gaps and wholes stay in place
Without gravity the game feels a bit more difficult, but you can plan your removal sequence better
The alphabet tile set: for a novice like me this helps a lot, as symbols are separated very clearly (not like those four different flower stones in the traditional set)
Creating a very huge (30x16) board
The smallest board (14x6) allows very short games
You can only reach the high-score table by clearing the board completely
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