These puzzles are a devious variation  of the stepping-stone mazes (2011). In 2013 Bob Henderson (USA) uncovered some fascinating unique tours on small  grids. This game offers  a taster of these results. The three tutorial levels will teach you everything you need to know, while the five main puzzles ramp up very quickly to a level of difficulty that may prove surprising. Do not feel compelled to finish them! Note: you may find the puzzles easier to solver as print-and-play puzzles.

  • Number of puzzles: 8
  • Average play time: longer than your patience
  • First published:  June 2022 (exclusive to
  • Keyboard controls: arrow keys or WASD to move; [Z] to undo; [R] for restart.
  • Touchscreen controls: tap at the main menu; swipe to move; open the tab menu in the upper left to undo moves and restart.
  • Hack:  source-code

SS-tour research - Bob Henderson - 2013
Puzzlescript implementation - Andrea Gilbert - 2022

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