Sum to Nine Sudoku
(Published on 27. September 2021, 19:51 by dgreenspan)
Normal sudoku rules apply. In addition, the digits in the cells touching each circle must sum to 9. Not all possible circles are necessarily given. Cells that are a chess knight's move apart must contain different digits.
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Solution code: Row 1 and column 1
Solved by rimodech, SKORP17, Greg, ___, barer, skywalker, zorant, PippoForte
