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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Thu Jul 29, 2010 5:40 am Post subject: Puzzle 10/07/29: C |
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| Code: | +-----------------------+
| 9 . . | . 2 . | 6 7 4 |
| . 6 2 | 4 . . | . . 1 |
| . 1 . | . . . | . 2 . |
|-------+-------+-------|
| . 4 . | 9 5 . | . . 6 |
| 1 . . | 2 7 4 | . . . |
| . . . | . 6 1 | . . . |
|-------+-------+-------|
| 8 . . | . . . | 2 . . |
| 4 . 5 | . . . | . 1 . |
| 6 2 . | 7 . . | . . 5 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Thu Jul 29, 2010 10:47 pm Post subject: |
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Two one step solutions...........
| Quote: | ANP(38=5)r36c4-(5=3)r1c6-r4c6=(3)r6c4; r7c4<>3
or
Extended potential xy-wing vertex: (3=8)r8c5-r9c6=r9c8-(8=3)r4c8-r4c6=(3)r6c4*-r6c1=(3)r2c1**-r1c23=(3)r1c6; r7c4*,r2c5**,r3c5,r7c6<>3 |
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Jul 30, 2010 10:10 pm Post subject: |
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| M-Wing on 38. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Jul 31, 2010 1:41 am Post subject: |
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| Marty R. wrote: | | M-Wing on 38. |
Which one; i.e., which cell had the elimination? |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Jul 31, 2010 5:05 am Post subject: |
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| Code: |
+-------------+-------------+----------------+
| 9 358 38 | 1 2 35 | 6 7 4 |
| 35 6 2 | 4 389 7 | 3589 3589 1 |
| 7 1 4 | 358 389 6 | 3589 2 389 |
+-------------+-------------+----------------+
| 2 4 7 | 9 5 38 | 1 38 6 |
| 1 38 6 | 2 7 4 | 3589 3589 389 |
| 35 3589 389 | 38 6 1 | 7 4 2 |
+-------------+-------------+----------------+
| 8 379 1 | 35 4 359 | 2 6 379 |
| 4 379 5 | 6 38 2 | 389 1 3789 |
| 6 2 39 | 7 1 389 | 4 389 5 |
+-------------+-------------+----------------+
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Play this puzzle online at the Daily Sudoku site
If r8c5=8, then r4c6=8. Extend 3 from r4c6 to r6c4; r7c4<>3. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Jul 31, 2010 5:42 am Post subject: |
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| Marty R. wrote: | | If r8c5=8, then r4c6=8. Extend 3 from r4c6 to r6c4; r7c4<>3. |
Thanks. I'm always curious when there are alternate choices that use the same values. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Sat Jul 31, 2010 7:35 am Post subject: |
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Is it a Wing? Is it a chain ? Is it an ALS xz ?
All of the above with a not quite symmetrical feel to it.
Pincers/Wing-tips shown by *. Or two sets A&B with restricted candidate (x) = 8 and common (z) is= 5. Elimination of either 5 solves the puzzle.
| Code: | +----------------+----------------+----------------+
| 9 358 38 | 1 2 A35* | 6 7 4 |
| 35 6 2 | 4 389 7 | 3589 3589 1 |
| 7 1 4 | 38-5 389 6 | 3589 2 389 |
+----------------+----------------+----------------+
| 2 4 7 | 9 5 A38 | 1 38 6 |
| 1 38 6 | 2 7 4 | 3589 3589 389 |
| 35 3589 389 |B38 6 1 | 7 4 2 |
+----------------+----------------+----------------+
| 8 379 1 |B35* 4 39-5 | 2 6 379 |
| 4 379 5 | 6 38 2 | 389 1 3789 |
| 6 2 39 | 7 1 389 | 4 389 5 |
+----------------+----------------+----------------+
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Jul 31, 2010 1:35 pm Post subject: |
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Don't forget the infamous "Almost Remote Pair" going from r6c4 => r4c6 => r9c6 =>r8c5 with fin (9)r9c6-(9=35)r17c6-(3)r4c6=(3)r6c4; r7c4<>3
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Jul 31, 2010 4:12 pm Post subject: |
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| Quote: | | Thanks. I'm always curious when there are alternate choices that use the same values. |
I shouldn't have needed that alternate, with MM's W-Wing staring at me.  |
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