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immpy
Joined: 06 May 2017 Posts: 571
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Posted: Fri Dec 21, 2018 2:52 pm Post subject: Did I fool the Draw/Play Grade function?? |
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Interesting puzzle; when I loaded it into Draw/Play and checked its' Grade it showed Very Hard...but it surely is more than a VH. Techniques beyond the X, XY, XYZ gambit are needed here, and upon asking for hints on Draw/Play it eventually reached the "Device Interface cannot explain this hint" stage fairly early; yet remained graded as VH. I leave it to the community to comment and/or explain this phenomenon.
Meanwhile, enjoy the puzzle...
Code: |
+-------+-------+-------+
| 4 . . | 2 . 7 | 9 . . |
| 2 8 . | 6 . . | . . . |
| . . 6 | . . . | . . 5 |
+-------+-------+-------+
| 8 1 . | 7 . . | . . . |
| . . . | . 8 . | . . . |
| . . . | . . 3 | . 4 9 |
+-------+-------+-------+
| 1 . . | . . . | 2 . . |
| . . . | . . 2 | . 5 7 |
| . . 5 | 8 . 1 | . . 6 |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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immpy
Joined: 06 May 2017 Posts: 571
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Posted: Thu Jan 10, 2019 11:52 am Post subject: |
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Here is the puzzle after basics:
Code: |
+--------------+-----------------+---------+
| 4 5 1 | 2 3 7 | 9 6 8 |
| 2 8 39 | 6 459 459 | 7 1 34 |
| 379 379 6 | 49 1 8 | 34 2 5 |
+--------------+-----------------+---------+
| 8 1 49 | 7 4569 4569 | 56 3 2 |
| 39 349 2 | 459 8 4569 | 56 7 1 |
| 5 6 7 | 1 2 3 | 8 4 9 |
+--------------+-----------------+---------+
| 1 3479 349 | 3459 45679 4569 | 2 8 34 |
| 6 349 8 | 349 49 2 | 1 5 7 |
| 37 2 5 | 8 47 1 | 34 9 6 |
+--------------+-----------------+---------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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immpy
Joined: 06 May 2017 Posts: 571
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Posted: Thu Jan 10, 2019 12:25 pm Post subject: |
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The puzzle CAN indeed be solved with only VH moves (X, XY, and XYZ wings). As it turned out, one would need multiple VH moves. I think I needed five steps. Helmut's website confirmed the path that one could follow.
So...it is I who have been fooled, not the Puzzle Grade function. I chose to follow more advanced techniques, but I still required multiple steps to solve.
All of that being said makes this one of, if not THE toughest VH puzzle I have experienced to date. A damn cool VH which was rated "Extreme" by my solver program.
cheers all...immp |
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immpy
Joined: 06 May 2017 Posts: 571
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Posted: Tue Jan 15, 2019 1:40 pm Post subject: |
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I have purposely NOT posted the steps needed for this one. Didn't want to be a spoiler. But if someone would like them, I can post them.
ALL VH moves; 4 steps.....
cheers...immp |
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