Rules
Various arrangements of the grid have been tried, but the original, and by far the most popular, is that shown to the right, which divides the board into 16 2×2 squares. Unless otherwise stipulated, the term grid board can be assumed to refer to this arrangement, and grid chess to chess played on this board.
In the position shown, white can play either a3 or a4, but cannot move his b-pawn. Black cannot play Bd5 but can play any other bishop move – if he wants to put his bishop on d5, it will take two moves (for example, first Ba8, and then Bd5). The white king is not in check from the queen, but if the queen were to take a step back with Qe3, it would be. The white king cannot take the queen, although the white knight can. The black king, on the other hand, is in check from the rook on c8. Black cannot escape check, as he could in normal chess, with Ke7 or Kf7, as these moves do not cross a grid-line, but he can play Kd7 and also Kd8, bringing the king into the same large square as the rook.
Read more about this topic: Grid Chess
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