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Comments and Results for 'Wraparound Sudoku-12 67'

StateTypeTitleSizePlayedAvg timeRating (#users)YoursYour bestPublishedExpires
UnplayedToroidalWraparound Sudoku-12 6712x126649:46Tricky (29)Subscribers only2nd Nov-
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Solution time without 'show wrong'

Unaided first solution time
Completed by42 users
Best time without any aid37:05 by JoergWausW
Best time with major aid19:18 by purrs
Best time with show wrong
or multiple sessions
3:45 by Cate-Lyn
Average solve time with no or minor aid58:28
Average solve time with no aid58:28
Average difficulty rating - all players6.0/10.0
Average difficulty rating - no aid7.0/10.0
Average difficulty rating - major aid10.0/10.0
Average difficulty rating - show wrong or
multiple sessions
6 comments (Add new comment)
Posted 2nd Nov 2020 at 18:20
winterer Daily subscriber Rated puzzle: Hard Best completion time: 23:05 Time on first attempt: 59:53 Used 'valid marks' Used 'auto remove'
This was probably the hardest puzzle I ever played on this site.

At one point about half-way through, after searching for a way forward for ten minutes, I resorted to guessing, figuring that it would be faster to backtrack out of a dead-end than continuing the search. Luckily, my guess was correct.

Not sure whether I just missed a clue, did not think quite enough steps ahead, or whether this is one of those puzzles where guessing is inevitable.

Posted 2nd Nov 2020 at 21:17
Last edited by gareth 2nd Nov 2020 at 21:18
gareth Administrator Daily subscriber Has started but not yet finished this puzzle
So far you're the only person to complete it without aids. Pretty impressive!

Techniques required never go past x-wing, but on a jigsaw/wraparound 12x12 puzzle it's often extremely hard to spot all the implications that might perhaps be easier to see on a regular puzzle.

Posted 3rd Nov 2020 at 20:11
JoergWausW Daily subscriber Completion time: 37:05
The last one of those that I solved, I fooled myself by making a wrong step. Just wrong. My step didn't work, but I thought it did.
I'll try this one as soon as I have a chance of playing it without being interrupted and work issues cool down a bit... I'm curious now.
Posted 8th Nov 2020 at 13:59
JoergWausW Daily subscriber Completion time: 37:05
Did it finally.
Had a moment of no way out, too (3 cells with just 9A in it). But found the mistake in time.
Posted 10th Nov 2020 at 07:31
winterer Daily subscriber Rated puzzle: Hard Best completion time: 23:05 Time on first attempt: 59:53 Used 'valid marks' Used 'auto remove'
37 Minutes! Impressive.

Had to play it again with helpers on to see whether I could find the same shortcut. :-)
But it still took two attempts to beat my first run. Next time, I must look harder for those x-wing groups.

Posted 10th Nov 2020 at 17:36
JoergWausW Daily subscriber Completion time: 37:05
I just played it through very carefully with help tools on (but didn't check it in the end) to check one thing:
It is possible to solve this one without any x-wing at all (but I used those when I did this puzzle the first time)

At one point I needed to find a 4-6-pair in a column that was only left in two cells (to spot this is my weak spot). So I could remove all other numbers from this cell. But even that might not really be necessary (maybe I didn't see something else).

Everything else is like "number x in this row only appears on white cells, so delete x in all white cells in the other rows."

But because of its size and because there seems to be only a narrow path to do it without x-wings, it takes time. The needed techiques are not too hard.

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  • A yellow/light blue highlight in the time distribution charts highlights your time, where relevant.
  • Rating scores out of 10.0 show the average difficulty rating chosen by users, where 1.0 is "Easy" and 10.0 is "Hard".
  • If a puzzle is opened more than once, including by loading from a saved position, then this is potentially a significant aid so it is listed as being completed with 'multiple sessions' for the purpose of the best time/average rating displays above.
  • Minor aid is defined as no more than one use of 'Check solution' when incomplete and/or no more than one use of 'Check solution' when wrong; and/or using highlighting aids (show repeated digits, show broken inequalities and show valid/invalid placements [slitherlink] only). Major aid is any and all other use of the solving aids except for 'show wrong'.

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