The Invisible Hand
(Published on 12. June 2026, 16:28 by Daemen)
- Normal sudoku rules apply.
- Anti-knight: Cells separated by a knight's move in chess may not contain the same digit.
- Anti-king: Cells separated by a king's move in chess may not contain the same digit.
- XV-: Cells orthogonally separated by an X or V must sum to 10 or 5, respectively. All possible X and V pairs are given.
Solution code: Box 9, Left-to-Right, Top-to-Bottom
Comments
on 2. July 2026, 01:19 by Rollo
Das ist wirklich sehr schön konstruiert.
on 18. June 2026, 12:46 by snuuba
Very beautiful, many thanks
on 16. June 2026, 21:02 by snuuba
Very beautiful, many thanks
on 15. June 2026, 16:34 by slowthinker
I think the break-in is 2*. After the breakin it flows easily.
For me, the important hint was from fitzie: "I thought it could be overkill". I used colors.
on 14. June 2026, 16:56 by itsid
that was a very nice puzzle, thank you
on 14. June 2026, 10:56 by Ndstripes
Very fun negative constraints!!!
on 13. June 2026, 18:09 by buzzard
@SanFranSam a copy cells button! I've been memorizing solution codes! Thanks :-)
on 13. June 2026, 15:32 by JVA
Had to bifurcate heavily for the break in
on 13. June 2026, 10:50 by Chenyekai
为什么我的SudokuPad中没有看见任何x和v
on 13. June 2026, 08:21 by SanFranSam
@hardline35 Not sure where you are solving but, under Settings then Advanced there is a Copy Cells Button you can switch on.
on 12. June 2026, 21:19 by fitzie
I like the break in. i thought it could be overkill.
on 12. June 2026, 21:00 by thomamas
Lovely. A well-designed puzzle with powerful constraints is very relaxing sometimes.
on 12. June 2026, 19:49 by snuuba
Very beautiful, many thanks
on 12. June 2026, 19:41 by hardline35
One of my favorite clue set anti king knight/XV or consecutive.
Also thanks for setting the solution code in box 9.
I don't know you all, but I type the solution code in the URL bar then copy/paste. URL history blocks the top of the puzzle.
on 12. June 2026, 18:39 by Daemen
Fixed difficulty left on default and removed unnecessary disjoint-group ruleset from an older version of the puzzle.
on 12. June 2026, 18:22 by Morphismic
I don't think the Disjoint-Group rule is needed to solve the puzzle. If I'm not mistaken I never used it.
on 12. June 2026, 18:08 by addie
6:49 for me. More like a 1* but still fun!
