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Rated too hard by Draw/Play...but

 
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Mon Mar 29, 2021 5:28 pm    Post subject: Rated too hard by Draw/Play...but Reply with quote

Hello all, interesting puzzle. Can't explain the rating. Enjoy...

Code:

+-------+-------+-------+
| . . . | . 8 4 | 6 . . |
| . . . | . 2 . | 3 . . |
| . . . | . . . | . 7 4 |
+-------+-------+-------+
| 3 6 . | 9 . . | . . 2 |
| 2 . . | . 5 . | . 1 8 |
| . 8 . | . . 2 | . . . |
+-------+-------+-------+
| 6 7 . | . . . | . . . |
| . 5 4 | 2 . 6 | . . . |
| 8 . 2 | . 3 5 | . . . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 446

PostPosted: Tue Mar 30, 2021 11:44 am    Post subject: Reply with quote

Ha! Did I make a mistake or does it solve with just basics? You fooled me immpy!
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Tue Mar 30, 2021 3:59 pm    Post subject: Reply with quote

Ha ha, yes! This does solve with basics. Any ideas why this fooled the Draw/Play function? Could it have been the empty boxes 1 and 9? Curious.
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Tue Mar 30, 2021 4:01 pm    Post subject: Reply with quote

Sort of timely for upcoming April Fool's Day.

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 446

PostPosted: Tue Mar 30, 2021 7:20 pm    Post subject: Reply with quote

immpy wrote:
Ha ha, yes! This does solve with basics. Any ideas why this fooled the Draw/Play function? Could it have been the empty boxes 1 and 9? Curious.


I was wondering the same thing! I used to think that the puzzles on this site that were improperly rated as VH were probably because the software was coded to first look for some VH moves before considering all other basic moves - BUT today I started wondering if there are maybe certain basic moves that are not being found at all (and consequently rating this puzzle as 'too hard!'). I came to the conclusion that it must not be finding some naked triples (or maybe some naked singles?) under certain circumstances. Interesting!
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dongrave



Joined: 06 Mar 2014
Posts: 446

PostPosted: Tue Mar 30, 2021 8:13 pm    Post subject: Reply with quote

dongrave wrote:
immpy wrote:
Ha ha, yes! This does solve with basics. Any ideas why this fooled the Draw/Play function? Could it have been the empty boxes 1 and 9? Curious.


I was wondering the same thing! I used to think that the puzzles on this site that were incorrectly rated as VH were probably because the software was coded to first look at some VH moves before considering all other basic moves - BUT today I started wondering if there are maybe certain basic moves that are not being found at all (and consequently rating this puzzle as 'too hard!'). I came to the conclusion that it must not be finding some naked triples (or maybe some naked singles?) under certain circumstances. Interesting!
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Wed Mar 31, 2021 3:00 pm    Post subject: Reply with quote

Very good analogy dongrave. That must be what is happening here. Funny it didn't assess it as Very Hard in it's rating, as you mentioned, and which we have seen at times. Went to the next level of Too Hard.

cheers...immp
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Wed Mar 31, 2021 3:04 pm    Post subject: Reply with quote

It WAS a pretty neat puzzle, and it did take a bit more digging with those basics in mind. Had me going for a while, too.
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Pat



Joined: 23 Feb 2010
Posts: 187

PostPosted: Tue Aug 10, 2021 12:05 pm    Post subject: "too hard" ( not ! ) Reply with quote

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