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Comments and Results for 'Killer Sudoku-8 123'

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 State Type Title Size Played Avg time Rating (#users) Yours Your best Published Expires Killer Sudoku-8 123 8x8 602 13:38 Easy (177) Was free until 19th Sep 2020 5th Sep Expired Show full chart rankings for Killer Sudoku-8 123
 Your puzzle statistics First solution time distribution Overall puzzle statistics Log in (or create a free user)to store and view your puzzle statistics Slowest 10% not shown0:00 22:10 Solution time without 'show wrong' Slowest 10% not shown0:00 20:28 Unaided first solution time Slowest 10% not shown0:00 17:42 Completed by 247 users Best time without any aid 2:41 by winterer Average solve time with no or minor aid 11:08 Average difficulty rating - all players 1.9/10.0 Average difficulty rating - no aid 2.1/10.0 Average difficulty rating - minor aid 3.6/10.0 Average difficulty rating - major aid 1.2/10.0 Average difficulty rating - show wrong ormultiple sessions 1.9/10.0
Posted 5th Sep 2020 at 00:42
Last edited by SlowBurn 5th Sep 2020 at 00:43
SlowBurn Completion time: 9:59 Used 'check puzzle' when incorrect
It might be possible that there is an alternative solution. On the two right most columns, 7 & 8 at the top row can be either 7 & 8 or 8 & 7 (with associated changes). I know it is more likely that I've missed a constrain somewhere.
Posted 5th Sep 2020 at 05:33
SCBilly Rated puzzle: Easy Completion time: 17:08 Used 'check puzzle' when incorrect
The group of 5 cells in the upper right corner contains a "1" (and a "5") in the third row from the top. Thus, the rightmost cell in the 2nd row cannot contain a "1" and must contain a "2". Because the top two cells in the rightmost column must add up to "9", the upper-right cell must be a "7" and not an "8".

So, the top must be "8 7" and the bottom must be "7 8".

(I was confused for a while by the same thing.)

So, the solution is unique.