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XOR

Xor is a puzzle to test spatial insight.
With a walker (shield) all happy masks are to be removed before reaching the door.

The walker can be moved by clicking next to it (four directions), drag along the row or column and with arrow-keys.
The Delete-key withdraws the last step(s).
You got two walkers, selectable with 'walker' and the Enter-key.
'<5' undoes the last five steps.
The '<<' button is to restart the game.
'video' to start replay video of done steps, 'pause' halts, 'step' one next step.
'view' to resize the view in steps between original and full size.
'save' stores the current situation for eigth days (as a cookie) and replaces an earlier storage.
'load' restores the last, maximal eight days old, situation stored with 'save'. The 'load' button is available in a begin situation, as after '<<'.

Once started, you can play offline, without an open internetconnection.
Speed and sound and are not functional; there are no random events.

Mazes below are in increasing complexity order.
Play Together to learn by experience the properties of the few characters and objects in Xor games. This maze has intriguing situations.
The Cave is the most complex Xor maze, for experienced Xor gamers.

BBC serieAmiga serieApple Macintosh
  1. Dots and Waves
  2. Something Fishy
  3. Chicken Supreme
  4. Explosive Mixture
  5. Henry's Anguish
  6. The Dolls House
  7. Dolly's Revenge
  8. Enlightenment
  9. The Challenge
  10. Patience Pending
  11. Razor Edge
  12. The Happy Hour
  13. Deja Vu
  14. Penultimate
  15. The Decoder
  1. Taurus
  2. Andromeda
  3. Perseus
  4. Cameloparous
  5. Ursa Nagor -modified
  6. Draco
  7. Hercules
  8. Delphinus
  9. Aquila
  10. Wheel of Fortune
  11. Corvus
  12. Canis Maior
  13. Hydrus
  14. Vela Carina
  15. The Hidden Cavern
  1. Together
  2. The Cave

The game Xor is created by Paul Carruthers and Ian Downend for the Atari ST and Amiga. Paul formed Astral Software Ltd in 1987.
The player here is a remake of Xor by 'Astral 1981 / JvdLingen 1989' on the Macintosh computer of those days, in 2004 programmed in javascript by Rob Veldhuyzen van Zanten.
In the original Macintiosh game the display is fixed to 7x7 fields, and a restart is required after each misstep, making the goal almost unreachable.
There to start The Cave, one has to type the code, received at the exit of Together.
The player here is tolerant, enjoy your game.

Solutions of the original BBC serie gave letters; 'The Decoder' helped to find a woord.

XOR in Wikipedia.
Enigma puzzle.
Xor version with BBC levels of Ovine, 2004.
Editor for Ovine mazes.