gareth Administrator Daily subscriber Has not played this puzzle yet
Don't read this until you've tried the puzzle:
The main secret of this puzzle is the two pairs of touching 4s in the centre two columns of the puzzle. One of each pair must be black in both their rows and their columns, which forces seven other 4s in their rows and columns to be black.
Posted 30th Oct 2020 at 11:55
Silke Has not played this puzzle yet
What a coincidence: Rank 4, Completion time: 4:44. I tried my best! :-)
Posted 30th Oct 2020 at 13:37
gareth Administrator Daily subscriber Has not played this puzzle yet
Haha - four 4s! Very good! :)
Posted 30th Oct 2020 at 20:21
JoergWausW Daily subscriber Has not played this puzzle yet
didn't use the 4-columns-logic at the beginning, only the rows-logic.
Earned the star * with (again) one wrong number when checking. Found that wrong white 2 quickly this time.
Had more trouble with the bottom right corner (because I missed some squares that had to be shaded...), had to use inverse-logic instead.
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Key
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'.
The main secret of this puzzle is the two pairs of touching 4s in the centre two columns of the puzzle. One of each pair must be black in both their rows and their columns, which forces seven other 4s in their rows and columns to be black.
Earned the star * with (again) one wrong number when checking. Found that wrong white 2 quickly this time.
Had more trouble with the bottom right corner (because I missed some squares that had to be shaded...), had to use inverse-logic instead.
You can however view other players' statistics and comments in the tables above.