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### Comments and Results for 'Hitori 966'

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 State Type Title Size Played Avg time Rating (#users) Yours Your best Published Expires Hitori 966 17x17 484 24:18 Moderate (143) Was free until 8th Jan 2021 25th Dec Expired Show full chart rankings for Hitori 966
 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 46:02 Solution time without 'show wrong' Slowest 10% not shown0:00 49:02 Unaided first solution time Slowest 10% not shown0:00 49:02 Completed by 196 users Best time without any aid 16:16 by brubakee Best time with minor aid 5:44 by purrs Best time with major aid 5:39 by fsolera Best time with show wrongor multiple sessions 1:24 by teryakif Average solve time with no or minor aid 31:10 Average difficulty rating - all players 4.2/10.0 Average difficulty rating - no aid 4.5/10.0 Average difficulty rating - minor aid 5.5/10.0 Average difficulty rating - major aid 3.6/10.0 Average difficulty rating - show wrong ormultiple sessions 4.1/10.0
Posted 28th Dec 2020 at 21:58
Cartoonite Daily subscriber Rated puzzle: Moderate Completion time: 20:51
It seems to me that the solve time difference on this puzzle demonstrates that "show repeated digits" should probably be considered more than minor aid.

The 2 top solvers in the "without solving aids" category (as of this writing) completed the puzzle in 5:44 and 7:22, respectively, and both had "minor aid", presumably in the form of "show repeated digits". The top solver with no aid (again, as of this writing) completed the puzzle in 17:21, more than 3x the top solver's time and more than 2x the 2nd place solver's time.

The whole point of this puzzle type is to remove repeated digits. Especially on a puzzle this large, a large part of the solve time is spent scanning the grid for repeated digits. I have no way of quantifying what percentage of the solve time is spent on that, but I wouldn't be surprised to find out it is 50% or more, with the percentage increasing the larger a puzzle gets.

It's just my opinion, of course, but it seems to me that anything that cuts more than half of the work out of a solving a puzzle should qualify as major aid.

Posted 29th Dec 2020 at 22:11
JoergWausW Daily subscriber Best completion time: 18:19 Time on first attempt: 28:29 Used 'show invalid' Used 'check puzzle' when incorrect
I started the same topic twice so far... the second time gareth agreed, but so far he didn't change anything.

My minor aid was one wrong shaded/unshaded square when I checked - then I looked at the right number, but didn't see the repeated one in the same line.... I didn't want to go through the whole 289 squares, so I checked for the repeated one. It was a 1, too.
It started pretty quickly and then I didn't see any logic and changed strategy to "guess and contradiction". Ran into that twice. Probably I should start doing that way sooner instead of looking for a logical approach for too long...

Posted 30th Dec 2020 at 00:50
Last edited by gareth 30th Dec 2020 at 00:51
gareth Administrator Daily subscriber Rated puzzle: Hard Completion time: 6:20 Used 'auto remove' Used 'show invalid'
Okay, I've fixed this now. It was only ever an accident that it counted as a minor aid - it used the same 'show repeated' flag as in the number puzzles, where it counts as a minor aid. Now I've made the game completion code check to see if you just played hitori, and it counts it as a major aid instead.

This will affect ALL plays going forward, so puzzles published prior to today will have different rules for late players for the hitori rankings. I thought this was better than having the rules change dependent on the date of the puzzle you play, which would be confusing.

Now if you see the '*' in the left column, it means the player press 'check' when they were wrong (but just a single time), for all plays from today onwards.

Posted 30th Dec 2020 at 16:35
Cartoonite Daily subscriber Rated puzzle: Moderate Completion time: 20:51
Thank you, Gareth.
Posted 30th Dec 2020 at 18:03
gareth Administrator Daily subscriber Rated puzzle: Hard Completion time: 6:20 Used 'auto remove' Used 'show invalid'
No problem, and thanks for reporting this/reminding me of this - I should have changed this before, because you're absolutely right that it leads to significantly faster solver times.