The Spider from Mars
(Published on 21. February 2023, 12:34 by Abdul the Killer)
Otherwise standard Sudoku rules apply.
Solution code: row 2 col 8
Comments
on 23. May 2024, 04:06 by Shuhua Milk
Nice!
on 22. February 2023, 01:02 by ScatterBrain
A great puzzle. I had to be very careful on each marking as there were 4 considerations for each number: if the cell was shaded or not, and for each adjacent cell that was shaded or not.
I had to restart 4 times but then finally got it!
Thanks for setting.
on 21. February 2023, 19:03 by Paquet Voleur
@AlSina Maybe a minute re-wording of the rule could help? "Cells containing values exactly one greater than an immediate neighbour (diagonally or orthogonally) WITHIN their box are shaded. All the shaded cells are given." The rule concerns only cells in the same box as the one under consideration for shading.
on 21. February 2023, 13:09 by AlSina
Can anyone explain this puzzle's description to me?
___
Let me give you two small examples of the shading logic.
Look at the 5 in box 4. It is in an unshaded cell -- this means that 4 cannot be adjacent to it, particularly cell (4,5) cannot be a 4.
Meanwhile, look at the 5 in box 9. It is in a shaded cell -- this means that a 4 must be one of the adjacent cells (7,8), (8,7) or (8,8).
--ATK
