- One player hides balls, the other tries to find them
- Four balls are hidden on an 8x8 grid by the hider
- The seeker uses imaginary rays to get information on where the balls are hidden
- The computer is the hider in the 1-player game
- Players take a turn at each role in the 2-player game
- The object is to find the hidden balls in as few tries as possible
32 31 30 29 28 27 26 25 ╔══╤══╤══╤══╤══╤══╤══╤══╗ 1║ │ │ │ │ │ │ │ ║24 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 2║ │ │ │ │ │ │ │ ║23 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 3║ │ │ │ │ │ │ │ ║22 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 4║ │ │ │ │ │ │ │ ║21 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 5║ │ │ │ │ │ │ │ ║20 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 6║ │ │ │ │ │ │ │ ║19 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 7║ │ │ │ │ │ │ │ ║18 ╟──┼──┼──┼──┼──┼──┼──┼──╢ 8║ │ │ │ │ │ │ │ ║17 ╚══╧══╧══╧══╧══╧══╧══╧══╝ 9 10 11 12 13 14 15 16
- Entry points are numbered 1 to 32 starting on the uppermost left and going counter-clockwise
- Rays can:
- Stay in the box (Hit)
- Exit back out the way they came (Reflection)
- Exit somewhere else (Detour)
Hit: The ray travels into a ball.
──────O
Detour: Rays change direction (90 degrees) to avoid passing by a ball.
O ───┐ │
Reflection: The ray comes back out the way it came. This can happen by being deflected before it enters.
║O ─┐║ ║
It can also happen by being deflected by two balls at once.
O ────── O
When a ball exits the box, it is marked.
- A hit is marked with red on its entry point
- A reflection is marked with yellow on its entry point
- A detour is marked with matching white symbols on the entry point and the exit point
If a ray encounters one ball straight on and one to the side, it counts as a hit.
──────O O
If a ray encounters three balls, it counts as a hit.
O ──────O O
A ray can be detoured many times... this can be misleading for the seeker.
O ─────┐ │ O │ ┌─┘ │ O
- The hider marks the locations of the hidden balls
- The seeker looks for hidden balls by sending in rays from different entry points
- The seeker marks balls as they are found
- Marked balls may be moved if further clues indicate that the placement may not be correct
- When the seeker is finished guessing, the game is scored
- 1 point for each ray used
- 5 points for each incorrect ball
When both players have played then the player with the lowest score is the winner.
In the case of a single player game, the score is compared with a predetermined "par" score for the given ball placement.