SHADING: Cells containing values exactly one greater than an immediate neighbour (diagonal or orthogonal) within their box are shaded. All the shaded cells are given.
Q: Q represents a fixed quadruple of digits, each of which must appear in one of the four cells surrounding each circle.
Otherwise standard Sudoku rules apply.
Solution code: Row 1
on 3. September 2024, 17:02 by Shuhua Milk
Nice!
on 17. March 2024, 14:48 by ChinStrap
So beautiful. The Q constraint made this so lovely yet different from your other ones.
---I'm glad you liked it, thanks for the solve and the comment. ---ATK
on 29. December 2023, 12:38 by Abdul the Killer
Thanks anyeyeball, Chelo and ozgaz for the kind comments (clearly ours is a minority opinion).
on 27. December 2023, 11:18 by anyeyeball
Excellent puzzle. About halfway through the puzzle, it dawned on me that should have taken advantage of the Q's much earlier! Thanks for setting such a great sudoku.
on 27. December 2023, 10:21 by Chelo
Very nice puzzle again, thank you ATK and have a nice Christmas!..
on 26. December 2023, 23:54 by ozgaz
Oh wow. Loved that. Such a different solve path from your usual ones. Q was a good idea for a different constraint. Thanks atk.