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peter urhegyi
Joined: 26 Oct 2020
Posts: 28
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 Posted: Wed Aug 25, 2021 9:35 pm Post subject: very hard rated by draw and play |
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I think this must be a mistake by the internal rating function. It doesn't need any vh step.
| Code: |
+-------+-------+-------+
| 1 . . | . . 7 | 9 . 4 |
| . 3 . | . 8 . | . . . |
| . . . | . . 6 | . 2 . |
+-------+-------+-------+
| 4 . 6 | . . . | 8 . . |
| . . . | . 5 . | . . 7 |
| 7 . . | 6 . 9 | . . . |
+-------+-------+-------+
| . . 5 | . . . | . . 3 |
| . 7 . | . 4 . | . 1 . |
| 8 . 9 | . . 2 | . . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Aug 26, 2021 8:29 am Post subject: |
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| Yes, I agree Peter. The rating algorithm got foxed? |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Sat Sep 04, 2021 11:30 am Post subject: very hard rated by draw and play |
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| Code: |
+---------------------+----------------------+-----------------------+
| 1 6 d28 | 235 23 7 | 9 c358 4 |
| 259 3 47 | 12459 8 145 | 1567 567 156 |
| 59 89 47 | 13459 139 6 | 1357 2 b158 |
+---------------------+----------------------+-----------------------+
| 4 259 6 | 127 127 3 | 8 59 1259 |
|f239 29 fd1*23 | 48 5 48 |f136 f369 7 |
| 7 258 1238 | 6 12 9 | 1345 345 125 |
+---------------------+----------------------+-----------------------+
| 26 14 5 | 1789 1679 18 | 2467 8-9 3 |
|e236 7 d23* | 589 4 58 | 256 1 a89 |
| 8 14 9 | 1357 1367 2 | 4567 4567 56 |
+---------------------+----------------------+-----------------------+
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(9=8)r8c9 – r3c9 = r1c8 – (8=23*1*)r185c3 – (3)r8c1 = (31*69)5c1378 => - 9r7c8; btte |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Sat Sep 04, 2021 3:46 pm Post subject: |
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Hi Clement, I think you got tricked by the wrong rating! Your grid can be solved using just basics. There's a hidden pair 29 in row 2 (corrected on 09/05/21, it previously said 'column 2') which leads to a unique 5 in column 1 and then from there it can eventually be solved.
Last edited by dongrave on Sun Sep 05, 2021 12:59 pm; edited 2 times in total |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Sat Sep 04, 2021 4:58 pm Post subject: |
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| dongrave wrote: | | Hi Clement, I think you got tricked by the wrong rating! Your grid can be solved using just basics. There's a hidden pair 29 in column 2 which leads to a unique 5 in column 1 and then from there it can eventually be solved. |
Sure, my grid is incomplete r5c2 is solved it is 2 leaving a naked pair 59 in r5c28 which completes it. Shame upon me  |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Sat Sep 04, 2021 6:27 pm Post subject: |
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| I think this is a grid that Keith might approve of. For a p&p solver there are a lot of hidden pairs and a triple and this requires a lot of diligence to hack your way out just using basics. |
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