Quadrucryptology
(Published on 18. August 2024, 16:34 by Pulsar)
Rules:
Normal sudoku rules apply.
Each digit from 1-9 is represented by a letter from A-I. You must determine
which letter represents which digit. You can use the register underneath the
grid for note-taking.
Regular quadruples: each digit in a circle must appear in one of the
4 cells surrounding the clue.
Self-indexing quadruples: an XYZW-clue outside a row or column
indicates that the cells at distances X, Y, Z, and W from the clue
contain an XYZW-quadruple.
Examples: A 2358-clue to the left of row 2
indicates that r2c2358 contain a 2358-quadruple; a 1467-clue underneath
column 8 indicates that r3469c8 contain a 1467-quadruple.
(Tooltip: the self-indexing quad clues are clickable cells. You can colour them or add corner marks if you wish)
Links:
SudokuPad (includes solution check)Solution Guide (pdf)
This puzzle was loosely inspired by Quad Code by Marty Sears. Fair warning: it's very challenging, but there is a logical solve path. Good luck!
Solution code: The digits in row 1, from left to right
Comments
on 6. September 2024, 09:03 by Pulsar
@dpatti 10 hours? Wow, I admire your tenacity, you deserve an award for that :-) I'm glad you enjoyed it. You can check the solution guide to see my own solve path. Thanks again!
on 6. September 2024, 06:41 by dpatti
This was, undoubtedly, my longest solve to date at just over 10 hours. I enjoyed slowly whittling it down, thanks for sharing!
on 19. August 2024, 23:27 by Pulsar
Fixed a typo in the title on SudokuPad, thank you @Fool on Hill for pointing it out. And thank you for solving and the kind words!
on 19. August 2024, 22:22 by Fool on Hill
What an interesting set of ideas ... great puzzle, but seriously hard ... I've not seen anything quite like it before.
