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dongrave
Joined: 06 Mar 2014
Posts: 568
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 Posted: Wed Jul 11, 2018 1:19 am Post subject: Helmut's VH 2018-07-09 |
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I am so enjoying Helmut's VH (or Advanced) or 1sudoku.com's Evil on days that this site doesn't have a VH.
Helmut's VH 2018-07-09.
| Code: |
+-------+-------+-------+
| . . 8 | 4 . . | . . . |
| 5 . . | . . . | 6 . . |
| . . . | 7 . . | . 4 1 |
+-------+-------+-------+
| 7 . . | . 6 1 | . 3 . |
| . 1 . | . 9 . | . 8 . |
| . 2 . | 3 7 . | . . 9 |
+-------+-------+-------+
| 3 9 . | . . 2 | . . . |
| . . 4 | . . . | . . 2 |
| . . . | . . 5 | 3 . . |
+-------+-------+-------+
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Of course I used my favorite method to solve this one with one step (i.e. a forcing chain w/ pincers on both ends! Thanks to Clement and Marty!) |
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Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
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| Posted: Wed Jul 11, 2018 7:22 am Post subject: |
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Hi everyone
After basics
| Code: |
+--------------+------------+-----------------+
| 19 367 8 | 4 125 369 | 579 2579 357 |
| 5 4 17 | 18 128 39 | 6 279 378 |
| 29 36 26 | 7 58 369 | 58 4 1 |
+--------------+------------+-----------------+
| 7 8 9 | 25 6 1 | 245 3 45 |
| 6 1 3 | 25 9 4 | 257 8 57 |
| 4 2 5 | 3 7 8 | 1 6 9 |
+--------------+------------+-----------------+
| 3 9 167 | 18 148 2 | 4578 157 45678 |
| 18 5 4 | 6 3 7 | 89 19 2 |
| 128 67 1267 | 9 148 5 | 3 17 4678 |
+--------------+------------+-----------------+
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Play this puzzle online at the Daily Sudoku site
When R2C3=7 Then R9C8=7 is true e false
7R2C3-(7R79C3)=7R9C2-7R9C8
and
(7-1)R2C3=1R1C1-1R8C1=1R8C8-(1=7)R9C8=>-7R2C3=>solution.
Ciao a Tutti
Paolo |
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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
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| Posted: Wed Jul 11, 2018 10:48 pm Post subject: |
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Hi everyone,
W-Wing with 1,9 in r1c1,r8c8 connected by number 9 in r18c7 and -1 in r8c1.
Ciao Gianni |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Wed Jul 11, 2018 11:09 pm Post subject: Helmut's VH 2018-07-09 |
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| Code: |
+------------------------+--------------------+-------------------------+
|h9-1 367 8 | 4 125 369 | 2579 2579 357 |
| 5 4 17 | 18 128 39 | 6 279 378 |
|g29 36 f26 | 7 58 369 | 58 4 1 |
+------------------------+--------------------+-------------------------+
| 7 8 9 | 25 6 1 | 245 3 45 |
| 6 1 3 | 25 9 4 | 257 8 57 |
| 4 2 5 | 3 7 8 | 1 6 9 |
+------------------------+--------------------+-------------------------+
| 3 9 e167 | 18 148 2 | 4578 157 45678 |
|a18 5 4 | 6 3 7 | 89 b19 2 |
| 128 d67 e1267 | 9 148 5 | 3 c17 4678 |
+------------------------+--------------------+-------------------------+
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(1)r8c1 = r8c8 - (1=7)r9c8 - (7=6)r9c2 - r79c3 = (6-2)r3c3 = (2-9)r3c1 = (9)r1c1 =>-1r1c1; stte |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Thu Jul 12, 2018 2:18 am Post subject: |
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| Nice solutions! Thanks guys! Mine was as follows: (9=8)r8c7-r3c7=(8-3)r2c9=(3-9)r2c6=r2c8=>r8c8<>9. (Tell me if my Eureka notation has any errors!) |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Thu Jul 12, 2018 6:15 am Post subject: |
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| dongrave wrote: | | Nice solutions! Thanks guys! Mine was as follows: (9=8)r8c7-r3c7=(8-3)r2c9=(3-9)r2c6=r2c8=>r8c8<>9. (Tell me if my Eureka notation has any errors!) |
It is perfect. |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Thu Jul 12, 2018 11:08 pm Post subject: |
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| Thanks Clement! Finally, I think I've finally got the hang of it. Thanks for your help - and thanks to Marty for his help too! |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sun Jul 22, 2018 11:11 am Post subject: |
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| Code: | *--------------------------------------------------------------------*
|*19 367 8 | 4 125 369 | 57-9 2579 357 |
| 5 4 17 | 18 128 39 | 6 279 378 |
| 29 36 26 | 7 58 369 | 58 4 1 |
*----------------------+----------------------+----------------------|
| 7 8 9 | 25 6 1 | 245 3 45 |
| 6 1 3 | 25 9 4 | 257 8 57 |
| 4 2 5 | 3 7 8 | 1 6 9 |
*----------------------+----------------------+----------------------|
| 3 9 167 | 18 148 2 | 4578 157 45678 |
|*18 5 4 | 6 3 7 |*89 19 2 |
| 128 67 1267 | 9 148 5 | 3 17 4678 |
*--------------------------------------------------------------------*
xy wing[(9=8)r19c1-(8=9)r8c7]-9r1c7; ste |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Thu Aug 02, 2018 5:00 pm Post subject: |
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Elegant solution arkietech, this was my path also.
cheers...immp |
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