Tiles must be identical to be removed.
Fully and partially covered tiles cannot be matched.
Tiles must have a free long edge in order to be eligible for matching.
You can undo a move without penalty.
Using theoption adds a 30-second penalty to your time.
If the arrangement does not allow further tiles to be matched, you will be given the option to shuffle the tiles in order to keep playing.
Shuffling tiles adds a 60-second penalty to your time.
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