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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Fri Sep 14, 2012 1:14 pm Post subject: Free Press September 14, 2012 |
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| Code: | Puzzle: FP091412
+-------+-------+-------+
| . . 5 | 3 . . | . . . |
| . . . | 2 . . | . 1 . |
| 7 8 . | . 6 . | . . 4 |
+-------+-------+-------+
| 4 . 3 | . . . | . 9 . |
| . . . | 9 . 1 | . . . |
| . 7 . | . . . | 8 . 2 |
+-------+-------+-------+
| 3 . 1 | . 5 . | . . 6 |
| . 5 . | . . 8 | . . . |
| . . . | . . 3 | 7 . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
Keith |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Sep 14, 2012 9:47 pm Post subject: |
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| Code: | *-----------------------------------------------------------*
| 69 1 5 | 3 4789 479 | 269 267 789 |
| 69 3 4 | 2 789 579 | 569 1 789 |
| 7 8 2 | 1 6 59 | 359 c35 4 |
|-------------------+-------------------+-------------------|
| 4 26 3 | 8 27 267 | 15 9 15 |
| 5 26 8 | 9 a234 1 | 346 3467 37 |
| 1 7 9 | 5 a34 b46 | 8 c346 2 |
|-------------------+-------------------+-------------------|
| 3 4 1 | 7 5 29 | 29 8 6 |
| 2 5 7 | 6 19 8 | 1349 c34 39 |
| 8 9 6 | 4 1-2 3 | 7 c25 15 |
*-----------------------------------------------------------*
wing
(2=34)r46c5-(4=6)r6c6-(6=3452)r3689c8 => -2r9c5; stte
either r5c5 and r9c8 must be a 2 and form pinchers of a wing
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Luke451
Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
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| Posted: Sat Sep 15, 2012 12:24 am Post subject: |
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| Nice spot, Dan! Looks like an ALS-xz, doesn't it? |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Sep 15, 2012 12:40 am Post subject: |
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| Luke451 wrote: | | Nice spot, Dan! Looks like an ALS-xz, doesn't it? |
Thanks,
I understand it better using ALS to build psuedo-cells to form an xy-wing type pattern. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Sep 15, 2012 1:04 am Post subject: |
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Definitely not a VH puzzle!
| Code: | after basics
+--------------------------------------------------------------+
| 69 1 5 | 3 4789 479 | 269 267 789 |
| 69 3 4 | 2 789 579 | 569 1 789 |
| 7 8 2 | 1 6 59 | 359 35 4 |
|--------------------+--------------------+--------------------|
| 4 26 3 | 8 27 267 | 15 9 15 |
| 5 26 8 | 9 234 1 | 346 3467 37 |
| 1 7 9 | 5 34 46 | 8 346 2 |
|--------------------+--------------------+--------------------|
| 3 4 1 | 7 5 29 | 29 8 6 |
| 2 5 7 | 6 19 8 | 1349 34 39 |
| 8 9 6 | 4 12 3 | 7 25 15 |
+--------------------------------------------------------------+
# 55 eliminations remain
r37 X-Wing <> 9 r12c6,r128c7
+--------------------------------------------------------------+
| 69 1 5 | 3 4789 47 | 26 267 789 |
| 69 3 4 | 2 789 57 | 56 1 789 |
| 7 8 2 | 1 6 59 | 359 35 4 |
|--------------------+--------------------+--------------------|
| 4 26 3 | 8 27 267 | 15 9 15 |
| 5 26 8 | 9 234 1 | 346 3467 37 |
| 1 7 9 | 5 34 46 | 8 346 2 |
|--------------------+--------------------+--------------------|
| 3 4 1 | 7 5 29 | 29 8 6 |
| 2 5 7 | 6 19 8 | 134 34 39 |
| 8 9 6 | 4 12 3 | 7 25 15 |
+--------------------------------------------------------------+
# 50 eliminations remain
(7=5)r2c6 - (5=9)r3c6 - (9=2)r7c6 - (2=9)r7c7 - (9=3)r8c9 - (3=7)r5c9 => r2c9<>7
-or-
(7=5)r2c6 - (5=6)r2c7 - (26=7)r1c78 => r1c56,r2c9<>7
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Sep 15, 2012 1:15 am Post subject: |
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| It seems that without a one-stepper these days, one goes down in ignominious defeat, and so it is with me. I hacked away and used five steps, ending with an XY-Chain. I suspect I could have found the chain without one or more of the previous steps. |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Sat Sep 15, 2012 6:33 am Post subject: Free Press September 14, 2012 |
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Marty
I think, what is important is the logic leading to the solution. Therefore, we should not consider mult-step solutions invalid or defeats as we have come across many puzzles which cannot be solved in one step. Although one step solutions are more elegant. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Sep 15, 2012 10:45 am Post subject: |
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| daj95376 wrote: | | Definitely not a VH puzzle! |
The LA Times call this puzzle "Diabolical" -- It is.  |
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