| View previous topic :: View next topic |
| Author |
Message |
immpy
Joined: 06 May 2017
Posts: 571
|
 Posted: Wed Jul 25, 2018 11:10 pm Post subject: Challenging Puzzle 072518 |
 |
|
Enjoy the puzzle...
| Code: |
+-------+-------+-------+
| . 2 . | 1 . 7 | . 9 . |
| . 3 . | . . . | . 1 . |
| . . 7 | . 9 . | 2 . . |
+-------+-------+-------+
| . 5 4 | . . 1 | . . . |
| . . . | 2 8 4 | . . . |
| . . . | 3 . . | 8 4 . |
+-------+-------+-------+
| . . 5 | . 4 . | 7 . . |
| . 8 . | . . . | . 2 . |
| . 1 . | 7 . 9 | . 8 . |
+-------+-------+-------+
|
Play this puzzle online at the Daily Sudoku site
cheers...immp |
|
| Back to top |
|
 |
dongrave
Joined: 06 Mar 2014
Posts: 568
|
| Posted: Wed Jul 25, 2018 11:13 pm Post subject: |
|
|
| Thanks immpy! I can't get the puzzle from Helmut's site tonight! (I kept getting an error about 'resource limit exceeded'.) Now I've got one to do. |
|
| Back to top |
|
|
immpy
Joined: 06 May 2017
Posts: 571
|
| Posted: Wed Jul 25, 2018 11:17 pm Post subject: |
|
|
| You are welcome dongrave. This is a tough one. Enjoy. |
|
| Back to top |
|
|
immpy
Joined: 06 May 2017
Posts: 571
|
| Posted: Thu Jul 26, 2018 10:33 pm Post subject: |
|
|
Here is the grid after basics:
| Code: |
+-------------+-------------+--------------+
| 56 2 68 | 1 356 7 | 4 9 3568 |
| 569 3 689 | 4 2 568 | 56 1 7 |
| 1 4 7 | 56 9 3568 | 2 356 3568 |
+-------------+-------------+--------------+
| 8 5 4 | 9 67 1 | 36 367 2 |
| 369 679 369 | 2 8 4 | 1 567 569 |
| 2 679 1 | 3 567 56 | 8 4 69 |
+-------------+-------------+--------------+
| 369 69 5 | 8 4 2 | 7 36 1 |
| 7 8 36 | 56 1 356 | 9 2 4 |
| 4 1 2 | 7 36 9 | 356 8 356 |
+-------------+-------------+--------------+
|
Play this puzzle online at the Daily Sudoku site
There is an early W-Wing 6/5 in r3c4, r6c6 connected by 5 in r8c46=>r23c6<>6. That brings us here:
| Code: |
+-------------+------------+--------------+
| 56 2 68 | 1 356 7 | 4 9 3568 |
| 569 3 689 | 4 2 58 | 56 1 7 |
| 1 4 7 | 56 9 358 | 2 356 3568 |
+-------------+------------+--------------+
| 8 5 4 | 9 67 1 | 36 367 2 |
| 369 679 369 | 2 8 4 | 1 567 569 |
| 2 679 1 | 3 567 56 | 8 4 69 |
+-------------+------------+--------------+
| 369 69 5 | 8 4 2 | 7 36 1 |
| 7 8 36 | 56 1 356 | 9 2 4 |
| 4 1 2 | 7 36 9 | 356 8 356 |
+-------------+------------+--------------+
|
Play this puzzle online at the Daily Sudoku site
The program I used to create this puzzle suggests that a Finned Franken Squirmbag (lol...of all things, right) exists on 6 at this stage. Like I would be able to find and/or identify it...lol. I am thinking strong links on the 5s could be used to make some useful eliminations, but I instead opted for a Finned XY-Wing of 356 with the pivot at r8c6, and pincers at r6c6 and r9c5. The pivot contains the extra candidate or fin (in this case a 6). Assuming the XY-Wing is true results in a contradiction after making would-be eliminations. Therefore, the fin of 6 is indeed true for r8c6. This will take the puzzle to its conclusion. In fact, the earlier W-Wing could have been bypassed if one chose to use the Finned XY-Wing initially.
Last edited by immpy on Thu Jul 26, 2018 11:05 pm; edited 1 time in total |
|
| Back to top |
|
|
immpy
Joined: 06 May 2017
Posts: 571
|
| Posted: Thu Jul 26, 2018 11:00 pm Post subject: |
|
|
One last thing...if one is indeed skilled and capable enough with Finned Franken Squirmbags, the elimination that results from that would be r6c9<>6(=9!). There would still be some more work to do. Another W-Wing and a pair of Skyscrapers await for the solving if one follows this route.
cheers all...immp |
|
| Back to top |
|
|
Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
|
| Posted: Thu Aug 02, 2018 5:39 pm Post subject: Challenging Puzzle 072518 |
|
|
I have to settle with two AICs | Code: |
+----------------------+----------------------+----------------------+
| e56 2 68 | 1 d356 7 | 4 9 3568 |
| f569 3 689 | 4 2 568 | g56 1 7 |
| 1 4 7 | 56 9 3568 | 2 356 3568 |
+----------------------+----------------------+----------------------+
| 8 5 4 | 9 d67 1 | 36 c367 2 |
| 369 679 369 | 2 8 4 | 1 b567 a569 |
| 2 679 1 | 3 567 56 | 8 4 69 |
+----------------------+----------------------+----------------------+
| 369 69 5 | 8 4 2 | 7 36 1 |
| 7 8 36 | 56 1 356 | 9 2 4 |
| 4 1 2 | 7 d36 9 | h356 8 36-5 |
+----------------------+----------------------+----------------------+
|
1): (5)r5c9 = (5-7)r5c8 = r4c8 - (7=5)r149c5 - r1c1 = r2c1 - r2c7 = (5)r9c7 => - 5r9c9
Opens the following grid
| Code: |
+---------------------+----------------------+-------------------+
| 56 2 68 | 1 c35 7 | 4 9 358 |
| 59 3 89 | 4 2 58 | 6 1 7 |
| 1 4 7 | 56 9 b3568 | 2 a35 358 |
+---------------------+----------------------+-------------------+
| 8 5 4 | 9 67 1 | 3 67 2 |
| 369 f679 369 | 2 8 4 | 1 g67-5 569 |
| 2 e679 1 | 3 d567 56 | 8 4 69 |
+---------------------+----------------------+-------------------+
| 369 69 5 | 8 4 2 | 7 36 1 |
| 7 8 36 | 56 1 356 | 9 2 4 |
| 4 1 2 | 7 36 9 | 5 8 36 |
+---------------------+----------------------+-------------------+
|
2): (5=3)r3c8 - r3c6 = (3-5)r1c5 = (5-7)r6c5 = r6c2 - r5c2 = (7)r5c8 => - 5r5c8; stte |
|
| Back to top |
|
|
Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
|
| Posted: Thu Aug 02, 2018 9:23 pm Post subject: |
|
|
Hi everyone
| Code: |
+-------------+-------------+--------------+
| 56 2 68 | 1 356 7 | 4 9 3568 |
| 569 3 689 | 4 2 568 | 56 1 7 |
| 1 4 7 | 56 9 3568 | 2 356 3568 |
+-------------+-------------+--------------+
| 8 5 4 | 9 67 1 | 36 367 2 |
| 369 679 369 | 2 8 4 | 1 567 569 |
| 2 679 1 | 3 567 56 | 8 4 69 |
+-------------+-------------+--------------+
| 369 69 5 | 8 4 2 | 7 36 1 |
| 7 8 36 | 56 1 356 | 9 2 4 |
| 4 1 2 | 7 36 9 | 356 8 356 |
+-------------+-------------+--------------+
|
Play this puzzle online at the Daily Sudoku site
(5-67)R5C8=(7-63)R4C8=(3-6)R4C7=6R4C5-6R9C5=6R9C79-6R7C8=6R3C8-6R3C4 and (5-7)R5C8=7R4C8-7R4C5=(7-5)R6C5=5R1C5-5R3C4=>R3C4=Ø=>-5R5C8=>solution in one step.
Ciao a tutti Paolo |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
