Copyright (c) 2008 Arty Sandler

The game is played on a 8x8 square. The board starts at the following position:

  • TURN - Each player moves a friendly stone sliding it over an orthogonal line of empty cells (like a chess Rook, with no jumps).
  • GOAL - Wins the player that makes a square pattern with his four stones (as the square's vertices), however, the smallest bounding box containing the cells should be at least 5x5.
An example

This is a winning pattern for Black, because they form a square with a bounding box of size 6x6.

In this case, however, White's bounding box is not big enough (just 3x3), so the game must continue.

You can check more details and play online at GameCenter.