Some sliding block puzzles listed by Edward Hordern

This page lists all the sliding block puzzles listed in Sliding Piece Puzzles by L.E.Hordern (OUP, 1986) which use

• a 4×5 containing "box"
• one 2×2 block
• no more than six 2×1 blocks
• no more than six 1×1 blocks

For each puzzle, this page gives

• The "name" of the puzzle, i.e. its identifier as in Hordern's book. This is a link to a working SVG version of the puzzle.
• Hordern's difficulty rating, indicated by a number of asterisks:
  • *: easy; warm-up exercise;
  • **: standard;
  • ***: tricky;
  • ****: difficult;
  • (*****: exceptionally difficult)
  • (******: the ultimate challenge.)
• the number of moves needed to solve it, counting any move of a single block as one move. This is the number automatically counted in the SVG versions of the puzzles.
• the number of moves needed to solve it, counting any move in a straight line of a single block as one move
• the initial state of the puzzle
• the completed state of the puzzle — all the blocks shown must be as shown, the others may be anywhere

Also listed here are:

• puzzle C17, which uses two 2×2 blocks; the objective is to interchange these two blocks
• puzzle C22, which uses eight 1×1 blocks

This site has more information on these, and other, SVG sliding block puzzles.

This page is hosted at olfrec.com.