Contact puzzlemix
Play free puzzles         Create free account         Instructions         Discussion forum         Log in    

Show only:

Click on column headings to sort.

Brained Up, daily online brain training site
daily online brain training
Cutting-edge brain training created by Dr Gareth Moore
Think faster, better,
and improve your mental capabilities

Sudoku Xtra, written by Dr Gareth Moore
Sudoku Xtra 24
logic puzzle compendium
Printed puzzles from Dr Gareth Moore


Back to the forum

Comments and Results for 'Hitori 905'

StateTypeTitleSizePlayedAvg timeRating (#users)YoursYour bestPublishedExpires
UnplayedHitoriHitori 90517x1711627:27Moderate (76)Subscribers only21st Jun-
Show full chart rankings for Hitori 905
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 shown

Solution time without 'show wrong'
Slowest 10% not shown

Unaided first solution time
Slowest 10% not shown
Completed by93 users
Best time without any aid17:33 by winterer
Best time with minor aid6:41 by purrs
Best time with major aid5:52 by anselmio
Average solve time with no or minor aid29:24
Average solve time with no aid30:33
Average difficulty rating - all players5.1/10.0
Average difficulty rating - no aid4.5/10.0
Average difficulty rating - minor aid5.5/10.0
Average difficulty rating - major aid4.5/10.0
Average difficulty rating - show wrong or
multiple sessions
4 comments (Add new comment)
Posted 21st Jun 2020 at 04:53
gareth Administrator Daily subscriber Rated puzzle: Hard Completion time: 6:27 Used 'auto remove' Used 'show invalid'
Probably the most interesting 17x17 there's been on puzzlemix - usually (I must admit) the 17x17 ones of these are just large but not that interesting. This one is full of different types of logical deduction, however!
Posted 21st Jun 2020 at 09:35
JoergWausW Daily subscriber Best completion time: 12:57 Time on first attempt: 20:46 Used 'show invalid'
At the end (last ~25 numbers) I used trial and error... probably there's a logical deduction I don't know.
Posted 22nd Jun 2020 at 07:37
Last edited by winterer 22nd Jun 2020 at 13:26
winterer Daily subscriber Rated puzzle: Moderate Best completion time: 13:34 Time on first attempt: 17:33
This puzzle is beautiful. It's worthwhile to go through with "show eliminated" on, to see how it can be solved by logical deduction only.

The crux is the top left corner. There's a cluster of cells with the same three numbers. Shading one of them incorrectly would lead to two closed-off areas. Deducing which one it is requires looking ahead a few steps. "Show eliminated" helps. If you use the right colour, you don't get much farther, but this is crucial.

Next there's a group "XYXY" on the right. This is easy, but you can deduce a lot from there.

Finally, once you shaded everything that you can deduce immediately from the previous step, there is a cell near the top edge where shading it wrongly leads almost immediately to two closed-off areas.

The rest follows.

Posted 22nd Jun 2020 at 20:28
JoergWausW Daily subscriber Best completion time: 12:57 Time on first attempt: 20:46 Used 'show invalid'
That pretty much describes what I did - no immediate step but planning ahead, looking for enclosed areas.
It's crucial what you try first...
Add new comment
Add a comment
Your comment:
Sorry: You must log in (create a free user) in order to be able to post comments on this puzzle.

You can however view other players' statistics and comments in the tables above.

Post comment


  • 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'.

Back to the forum

©Brained Up Ltd/Gareth Moore 2005-2021 - email - publishers please visit Any Puzzle Media - our privacy policy - registered in England & Wales no. 8642393