Logic Masters Deutschland e.V.

A message to you

A puzzle I set with a few people dear to me in mind.

It is meant as an introduciton to drawing variant sudokus.

Rules

Regular sudoku rules apply.

Digits in a circle appear in its surrounding cells.

Draw a loop such that:

• It goes through all 3x3 boxes at least once.
• It cannot enter cells around a circle.
• It has vertical (left-right) symmetry.

Cells from the same box that are on the loop must be of the same entropy.

For clarity:

• Vertical symmetry:
  • If r2c2 (row 2 column 2) is on the loop, so is r2c8
  • if r7c3 is on the loop, so is r7c7.
• Entropy groups:
  • Low digits [1, 2, 3]
  • Medium digits [4, 5, 6]
  • High digits [7, 8, 9]
• Example of a loop that visits all boxes, avoid circles and has symmetry:

Sudokupad link

Have fun :)