- designed by Néstor Romeral Andrés
- 2 players
Start
The board starts empty.
Play
Players take turns adding a piece of their colour to any playable point (empty hole or platform).
End
A player wins by making a flat line of their colour spanning side to side, or corner to corner, on any level.
Lines on the 4x4 level must be 4 balls long.
Lines on the 3x3 level must be 3 balls long.
Lines on the 2x2 level must be 2 balls long.
The following example shows a winning line of size 3 for White:
This shows a winning line of size 2 for Black:
Strategy
Most wins will occur on the 2x2 level, by the first player to reach that high.
Every game is guaranteed to produce a winner before the last ball is played.