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VH(+?) 022521

 
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Thu Feb 25, 2021 4:58 pm    Post subject: VH(+?) 022521 Reply with quote

Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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TomC



Joined: 30 Oct 2020
Posts: 110
Location: Wales

PostPosted: Fri Feb 26, 2021 7:36 am    Post subject: Reply with quote

Code:

+-----------+------------+---------------+
| 1347 5 9  | 8   6  147 | 124 13  2347  |
| 147  6 2  | 145 3  147 | 8   9   47    |
| 1347 8 14 | 14  2  9   | 6   5   347   |
+-----------+------------+---------------+
| 2    7 14 | 3   14 5   | 9   8   6     |
| 5    9 6  | 2   7  8   | 3   4   1     |
| 14   3 8  | 9   14 6   | 7   2   5     |
+-----------+------------+---------------+
| 689  1 7  | 46  5  234 | 24  36  23489 |
| 69   4 3  | 16  8  12  | 5   7   29    |
| 68   2 5  | 7   9  134 | 14  136 348   |
+-----------+------------+---------------+

Play this puzzle online at the Daily Sudoku site

Basics lead to an early 14 UR in r46c35 -8 in r6c1

Some more basics lead to grid above

Then I think it's maybe called a 1246 WXYZ in r7c4 r8c4 r8c6 r7c7 to eliminate 2 in r7c6 and r8c9
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dongrave



Joined: 06 Mar 2014
Posts: 446

PostPosted: Fri Feb 26, 2021 4:40 pm    Post subject: Reply with quote

There are a few more basics that can be performed on Tom's grid. There are LC's 1s in box 3 (-1r1c16) and in box 9 (-1r9c6) and there's a hidden pair 89 in row 7. The LC's of 1's in box 9 opens up a 234 XYZ Wing (-4r7c4) which can be used to solve it.

I also found a long single-step solution that I can post if anyone wants to see it. (It's pretty darn ugly though!)
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Fri Feb 26, 2021 5:25 pm    Post subject: Reply with quote

Yes, after basics and the UR Type 1 of (14) I was left with this:

Code:

+----------+-----------+--------------+
| 347 5 9  | 8  6  47  | 124 13  2347 |
| 147 6 2  | 5  3  147 | 8   9   47   |
| 37  8 14 | 14 2  9   | 6   5   37   |
+----------+-----------+--------------+
| 2   7 14 | 3  14 5   | 9   8   6    |
| 5   9 6  | 2  7  8   | 3   4   1    |
| 14  3 8  | 9  14 6   | 7   2   5    |
+----------+-----------+--------------+
| 89  1 7  | 46 5  234 | 24  36  89   |
| 69  4 3  | 16 8  12  | 5   7   29   |
| 68  2 5  | 7  9  34  | 14  136 348  |
+----------+-----------+--------------+

Play this puzzle online at the Daily Sudoku site
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Fri Feb 26, 2021 5:30 pm    Post subject: Reply with quote

Then implemented the XY-Wing:

4/6/3 in r7c48,r9c6=>r7c6,r9c89<>3.

cheers...immp
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