Zero-Determinant Kropki
(Published on 5. January 2021, 13:06 by JivkoJ)
This is my second attempt (after Determinant Sudoku) to use determinant-based clues. This puzzle is easier than the first one as all determinant values are known and equal to zero. (Info on Determinants in Wikipedia for further reading.)
Rules
SUDOKU: Normal Sudoku rules apply.
DETERMINANT: Brown squares are put in the centre of EACH 2x2 square/matrix that have determinant equal to 0 (zero). In other words: Multiplying the digits of each diagonal gives the same number.
KROPKI: Standard Kropki dots are put between cells that are NOT part of the SAME DETERMINANT clue. All black and white dots are given.
Note: Kropki dots does not apply if both cells are in the area of the same determinant clue (determinant clue areas are highlighted).
Solve online on F-Puzzles.
Have fun solving!
Solution code: Row 2 + Row 8 (18 digits)
Comments
on 10. January 2021, 09:51 by JivkoJ
Determinant clue areas (where no Kropki dots are shown) are highlighted.
Thank you Dandelo!
on 5. January 2021, 19:53 by Dandelo
Nice puzzle, good idea.
on 5. January 2021, 18:18 by JivkoJ
Potential Kropki dots are not shown if they are in the area of a determinant clue square. So negative Kropki constraint does not work near brown square.
