Grid chess

Various arrangements of the grid have been tried, but the original, and by far the most popular, is that illustrated, which divides the board into sixteen 2×2 squares.

Black cannot escape check as in standard chess with ...Ke7 or ...Kf7, as these moves do not cross a grid line.

The one shown won first prize in the first Grid chess problem tournament.

It is by H. Ternblad and was published in Fairy Chess Review, 1954[citation needed].

The solution: This brings the king into the same large square as the bishop, and so escapes the check.