Anti-Queen
(Published on 28. May 2021, 12:06 by DarkBeamIta)
A normal Sudoku, in addition digits 1 and 9 cannot repeat in both diagonal directions (Anti-Queen).
Solve online link (no check); https://f-puzzles.com/?id=yjaw6kw5
Solution code: Row 3 then row 7
Comments
on 6. October 2021, 01:17 by uvo_mod
Label ergänzt.
on 28. May 2021, 19:50 by SudokuExplorer
A 9x9 purely anti-queen sudoku does not mathematically exist, but you may be interested in emmettcito's Imperfect Anti-Queen Sudoku (id=0003RZ) or my 11x11 Toroidal Anti-Queen Sudoku (id=000446).
For more info check out: https://www.sciencedirect.com/science/article/pii/S0012365X07010394
Edit by DB - Thanks so much I Will take a look for sure! :O
on 28. May 2021, 17:15 by DarkBeamIta
Sir Phistomefel is correct of course, I am not really sure it's possible to create a puzzle where every digit respects Anti-Queen :) Hello all
on 28. May 2021, 16:43 by Phistomefel
@horseradish1: As far as I understood the rules, the Anti-Queen constraint only applies to the digits 1 and 9. So, I think the 4s shouldn't be a problem in this puzzle.
on 28. May 2021, 16:06 by horseradish1
The 4s are broken. The only possible location for a 4 in box 2 is R3C5, and the only place for a 4 in box 5 is R4C4. This breaks the Anti-Queen rule.
Also, your given 4s in box 1 and box 8 break the Anti-Queen rule before the puzzle has begun. Nice concept though.
on 28. May 2021, 12:06 by DarkBeamIta
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