Alternating Masyu

Today’s puzzle might be somewhat vulnerable to metalogic due to the sparse clues, but I think the actual logic involved is pretty interesting.

Alternating Masyu 1


  • Draw a single non-self-intersecting loop that runs through the centers of the cells and visits all pearls.
  • On black pearls the loop must make a right turn, and the loop must go straight through the cells before and after the pearl.
  • On white pearls the loop goes straight through, and the loop must make a right turn on at least one of the cells before and after the pearl.
  • Or, see Masyu rules.
  • Additionally, the loop must alternate between visiting black and white pearls: it can’t visit two pearls of the same colour in a row.

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