winterer Daily subscriber Rated puzzle: HardBest completion time: 4:14Time on first attempt: 12:38Used 'valid marks' Used 'auto remove' Used 'check puzzle' when incorrect
Nice one!
One of the few examples of classical sudoku where I don't (yet) see how it can be solved without some kind of look-ahead. (to which I count the "no matter which of the two possible values I place in square x, square y will always get value n a few steps later, so set y to n" that I found on the second try)
Posted 5th Sep 2025 at 08:35 Last edited by jermy 5th Sep 2025 at 08:54
jermy Daily subscriber Completion time: 7:47
I got to a point where I had to just randomly choose one of the two possible values in a square and see how it worked out. As it turned out, I chose correctly!
Posted 7th Sep 2025 at 08:49
winterer Daily subscriber Rated puzzle: HardBest completion time: 4:14Time on first attempt: 12:38Used 'valid marks' Used 'auto remove' Used 'check puzzle' when incorrect
OK, I'll retract my earlier comment. I was just too blind to spot the obvious. 😣
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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'.
One of the few examples of classical sudoku where I don't (yet) see how it can be solved without some kind of look-ahead. (to which I count the "no matter which of the two possible values I place in square x, square y will always get value n a few steps later, so set y to n" that I found on the second try)
Last edited by jermy 5th Sep 2025 at 08:54
Still a nice one!
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