Close Friends II
(Published on 24. December 2021, 07:06 by mathpesto)
Here's a sequel to a puzzle I constructed a few weeks ago. The rules are almost the same as "Close Friends", except white circles now deal with the sum of surrounding friendly digits rather than the amount of surrounding friendly digits. Comments and ratings are much appreciated. Hope you enjoy!
Rules:
Normal sudoku rules apply.
Odd/Even: A digit in a gray square must be even. A digit in a gray circle must be odd.
Close Friends: A digit in a white square must be friendly. (A digit is said to be "friendly" if it matches its row, column, and/or box number.)
A digit in a white circle must be the sum of the surrounding friendly digits, not including itself. (In other words, the sum of the friendly digits that are orthogonally and diagonally adjacent to the white circle.)
Not all white squares/circles are necessarily given.
Puzzle:
Solution code: Enter column 3 and column 7 (18 digits, no spaces)
Comments
on 24. December 2021, 18:32 by Bankey
Enjoyable solve, though very tough. Needs close attention. Thanks, mathpesto :)
on 24. December 2021, 13:40 by mathpesto
Clarified rules
on 24. December 2021, 11:24 by xdy
All friendly neighbors including both kinds should be summed. I think 'and/or' means it is inclusive.
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I'll make it clearer in the rules to just say "and". Thanks! -MathPesto
