Tight Squeeze
By T.R. Dowson. White to mate in 21 moves:

It’s not as hard as it sounds, though it’s a bit like a square dance in a submarine.
An idler's miscellany of compendious amusements
By T.R. Dowson. White to mate in 21 moves:

It’s not as hard as it sounds, though it’s a bit like a square dance in a submarine.