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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 933
Location: Rimini, Italy
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 Posted: Sun Oct 25, 2020 10:14 am Post subject: Oct 25 VH |
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Hi everyone,
| Code: |
+-----------+----------+---------+
| 58 7 6 | 58 2 4 | 9 3 1 |
| 4 9 2 | 7 3 1 | 5 6 8 |
| 358 38 1 | 568 9 68 | 7 2 4 |
+-----------+----------+---------+
| 2 1 5 | 3 8 7 | 6 4 9 |
| 9 6 3 | 4 1 5 | 2 8 7 |
| 7 4 8 | 9 6 2 | 3 1 5 |
+-----------+----------+---------+
| 38 238 7 | 1 5 36 | 4 9 236 |
| 1 23 4 | 26 7 9 | 8 5 236 |
| 6 5 9 | 28 4 38 | 1 7 23 |
+-----------+----------+---------+
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Play this puzzle online at the Daily Sudoku site
| Quote: | W-Wing 2,3 in r8c2,r9c9 SL with number 2 in r7c29 and -3 in r8c9
or
XY-Wing 2,3,6 in r7c6,r8c24 and -3 in r7c12 |
Ciao Gianni |
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storm_norm22
Joined: 24 Oct 2020
Posts: 15
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| Posted: Sun Oct 25, 2020 11:15 pm Post subject: |
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| Code: | +-----------------+-----------------+-----------+
| (58) 7 6 | (58) 2 4 | 9 3 1 |
| 4 9 2 | 7 3 1 | 5 6 8 |
| 3(5-8) 3(8) 1 | 6(5-8) 9 6(8) | 7 2 4 |
+-----------------+-----------------+-----------+
| 2 1 5 | 3 8 7 | 6 4 9 |
| 9 6 3 | 4 1 5 | 2 8 7 |
| 7 4 8 | 9 6 2 | 3 1 5 |
+-----------------+-----------------+-----------+
| 38 238 7 | 1 5 36 | 4 9 236 |
| 1 23 4 | 26 7 9 | 8 5 236 |
| 6 5 9 | 28 4 38 | 1 7 23 |
+-----------------+-----------------+-----------+ |
this doesn't solve it.
if you are looking to touch up on your UR practice, notice the UR (58)r13c14
because the 5's are locked in those cells you can safely remove the 8's from r3c14 |
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storm_norm22
Joined: 24 Oct 2020
Posts: 15
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| Posted: Sun Oct 25, 2020 11:30 pm Post subject: |
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| Code: | +----------------+---------------+-----------+
| 58 7 6 | 58 2 4 | 9 3 1 |
| 4 9 2 | 7 3 1 | 5 6 8 |
| 358 38 1 | 568 9 68 | 7 2 4 |
+----------------+---------------+-----------+
| 2 1 5 | 3 8 7 | 6 4 9 |
| 9 6 3 | 4 1 5 | 2 8 7 |
| 7 4 8 | 9 6 2 | 3 1 5 |
+----------------+---------------+-----------+
| (38) (238) 7 | 1 5 (36) | 4 9 236 |
| 1 3-2 4 | (26) 7 9 | 8 5 236 |
| 6 5 9 | 28 4 38 | 1 7 23 |
+----------------+---------------+-----------+
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the elusive WXYZ wing extended that solves it.
| Quote: | | (2=38)r7c12 - (3=6)r7c6 - (6=2)r8c4; r8c2 <> 2 |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Mon Oct 26, 2020 3:40 pm Post subject: |
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Nice solving techniques everyone.
immp |
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TomC
Joined: 30 Oct 2020
Posts: 358
Location: Wales
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| Posted: Fri Oct 30, 2020 6:58 pm Post subject: |
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My solution was to eliminate 2 from R7C9 because that would result in
either box 7 not having any 2s
or row 7 not having any 6s
Tom |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Sat Oct 31, 2020 1:34 pm Post subject: |
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| TomC wrote: | My solution was to eliminate 2 from R7C9 because that would result in
either box 7 not having any 2s
or row 7 not having any 6s
Tom |
Hi Tom, I didn't see your solution right away - but with a little bit of searching I found what I think you're talking about.
2r7c9 - (2=3|8)r7c12 - (3=6)r7c6 - (6=2)r8c4 - 2r8c2
or 2r7c9 - (2=3|8)r7c12 - (3=2)r8c2 - (2=6)r8c4 - 6r7c6.
Thanks, Don. |
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TomC
Joined: 30 Oct 2020
Posts: 358
Location: Wales
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| Posted: Sat Oct 31, 2020 3:34 pm Post subject: |
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Thanks, Don
I have trouble with notation but think I've understood it.
There is a third way of looking at it by not involving c12
2r7c9 gives r9c9 = 3 and r8c9 = 6 and then r8c4 = 2 so no 2s in box 7
Tom |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Sat Oct 31, 2020 3:58 pm Post subject: |
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| Love those WXYZ-Wings. |
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