Play Union mahjong and try to remove the construction of tiles from the playing field. However, you can remove only the identical knuckles connected by a symbolic straight or broken line containing no more than two right angles. You need to be very attentive to find such pairs. Do not delay the search, because the time of each move is limited and counted on a special scale. If you go to a dead end, you can use hints. However, there are only 6 hints, so do not waste them.
How to play?