Zarrows

by Dr Logic by Dr Logic

CASE 3291

Zarrows

byDr Logic

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  • Diagonals
  • Kropki dots

The brief

Normal Sudoku Rules Normal Zipper Rules Normal Ratio Rules Normal Arrow Rules Each diagonal must be a set of 1-9 (no repeats) The sum of ALL ZIPPER CELLS is (2^n) - 1 where n is some (positive) integer. (For clarity there are 2 zippers in row 1, each 3 cells long)

The brief doesn't say what the black dots mean. We read them as standard Kropki dots (a black dot joins digits where one is double the other), which the setter's solution confirms.