Common rules.
- The shapes of certain types to fall into the stock one at a time at constant speed.
- Each shape continues to fall until it to land on bottom of the stock or another shape.
- Player can manipulate the shape only when it falls.
- The shape can be rotate, move to the left or to the right, or drop down.
- When cells of the shapes to form a solid line, this line is destroyed.
- If the stock is overflowed, the game is over.
Special rules.
- The stock is filled with a pattern, which must be destroyed.
- If the pattern is destroyed, player passes to the next pattern.