The dh2 collection
Author's note: There are no computer-generated levels as I
am trying to evolve a puzzle-making style, and so experimenting
with as many different forms as possible. Some of the puzzles
are very, or slightly, symmetrical as a stylistic device (in
this I am influenced by David W. Skinner's excellent Sasquatch
puzzle sets at his Sokoban page). Others are completely
unsymmetrical and the style is in the variations alone. (David Holland)
to cancel the last move