1. Move (hit) all circles (balls) one or more times, and bring them to a cell with an H (hole). One circle must be brought to every H cell.
  2. Show the movement of a circle by an arrow, with the tip of the arrow in the cell where it stops. The arrows can not cross other circles, H cells, or lines of other arrows.
  3. A circle (ball) moves across as many cells as the number in it in the first move (shot), vertically or horizontally. The next move becomes one shorter, it decreases the number of cells to pass by 1. The direction of movement may change after a move (shot). When the next movement becomes 0, or the circle (ball) stops at an H cell, the circle cannot move any further.
  4. A circle cannot leave the grid (OB), and cannot stop in a grey area (water hazard).

List of puzzles