Normal Sudoku rules apply. Every pair of adjacent digits that sum to A, B, or C have been marked with a white, gray, or black dot, respectively. A, B, and C are different and must be determined by the solver.
Penpa (use blue or green for answer check)Solution code: Row 5, Column 5
on 2. August 2022, 08:59 by Richard
Impressive construction!
Fully logical solvable, interesting untill the very last digit. Thanks!
on 4. May 2022, 14:16 by Phistomefel
There is not a single superfluous dot which is very impressive given the negative constraint of this puzzle type. Thank you very much for setting this puzzle, gliperal!
on 10. December 2021, 03:55 by Vebby
Wonderful setting! 4 stars difficulty for me.