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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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 Posted: Fri May 07, 2010 4:20 pm Post subject: LA Times May 7, 2010 |
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The Chicago Free Press is gone?
The Detroit Free Press is still there, I hope 
Well, the LA Times is there for sure. Today's puzzle (not yet started):
004000700290005000600000800510203060000060000060900017001000002000308051008000300
| Code: |
+-------+-------+-------+
| . . 4 | . . . | 7 . . |
| 2 9 . | . . 5 | . . . |
| 6 . . | . . . | 8 . . |
+-------+-------+-------+
| 5 1 . | 2 . 3 | . 6 . |
| . . . | . 6 . | . . . |
| . 6 . | 9 . . | . 1 7 |
+-------+-------+-------+
| . . 1 | . . . | . . 2 |
| . . . | 3 . 8 | . 5 1 |
| . . 8 | . . . | 3 . . |
+-------+-------+-------+
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Play online |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat May 08, 2010 1:40 pm Post subject: |
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A two stepper.
AUR47 r58c12. To prevent DP, r5c1=8 or r8c2=2, which results in r5c1<>7, r8c2<>4
This left a code set that appeared similar to a BUG+2, but did not meet the criteria of three occurrences of a digit in each house for each cell. I used a w-wing 38 in r2c5 & r6c1 to complete the puzzle.
Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sat May 08, 2010 3:18 pm Post subject: |
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Ted, help me out on your AUR please?
I still have a 9 in r8c1 which would also stop the DP, I dont see how a 2 in r8c2 makes the eliminations?
Im missing something...
Peter |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat May 08, 2010 4:09 pm Post subject: |
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After basics: | Code: | +-------------------+-------------------+-------------------+
| 1 8 4 | 6 39 29 | 7 239 5 |
| 2 9 37 | 478 3478 5 | 1 34 6 |
| 6 37 5 | 147 13479 1279 | 8 2349 39 |
+-------------------+-------------------+-------------------+
| 5 1 79 | 2 78 3 | 49 6 489 |
| 478 47 279 | 1578 6 17 | 25 39 389 |
| 38 6 23 | 9 58 4 | 25 1 7 |
+-------------------+-------------------+-------------------+
| 3479 3457 1 | 457 4579 79 | 6 8 2 |
| 479 247 6 | 3 2479 8 | 49 5 1 |
| 49 25 8 | 15 125 6 | 3 7 49 |
+-------------------+-------------------+-------------------+ |
I can make a couple of eliminations, but not much progress. (Ignoring long XY-chains.) There is a UR6 2-9, and a SS / kite on 7.
In Ted's UR I can see that R8C2 is not 4, but that's it.
Keith |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sat May 08, 2010 4:51 pm Post subject: |
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I got there in the end in a two step with a couple of short-ish xy-chains oddly over the same cells. Suppose the last one is technically an als-chain - though not a complicated one or I wouldn't have seen it!
The UR47 got cleaner but never helped me..
xy-chain (7=3)r2c3-(3=2)r6c3-(2=5)r6c7-(5=8)r6c5-(8=7)r4c5; r2c5<>7, r4c3<>7
als-chain (3=2)r6c3-(2=5)r6c7-(5=8)r6c5-(8=34)r2c58; r2c3<>3 |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat May 08, 2010 6:30 pm Post subject: |
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I found the DP, my solver provided the URs.
| Code: | +-----------------------------------------------------------------------+
| 1 8 4 | 6 39 29 | 7 239 5 |
| 2 9 37 | 478 3478 5 | 1 34 6 |
| 6 37 5 | 147 13479 1279 | 8 2349 39 |
|-----------------------+-----------------------+-----------------------|
| 5 1 79 | 2 78 3 | *49 6 *489 |
| 478 47 279 | 1578 6 17 | 25 39 389 |
| 38 6 23 | 9 58 4 | 25 1 7 |
|-----------------------+-----------------------+-----------------------|
| 3479 3457 1 | 457 4579 79 | 6 8 2 |
| *479 247 6 | 3 2479 8 | *49 5 1 |
| *49 25 8 | 15 125 6 | 3 7 *49 |
+-----------------------------------------------------------------------+
# 73 eliminations remain
<49> DP => r4c9=8 and/or r8c1=7
r8c1=7 => r8c5<>7,r8c1<>9
r4c9=8 r4c5=7 => r8c5<>7
r4c9=8 r9c9=4 r9c1=9 => r8c1<>9
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| Code: | r7 b8 Locked Candidate 1 <> 7 r7c12
+--------------------------------------------------------------+
| 1 8 4 | 6 39 29 | 7 239 5 |
| 2 9 37 | 478 3478 5 | 1 34 6 |
| 6 37 5 | 147 13479 1279 | 8 2349 39 |
|--------------------+--------------------+--------------------|
| 5 1 79 | 2 78 3 | 49 6 489 |
| 478 47 279 | 1578 6 17 | 25 39 389 |
| 38 6 23 | 9 58 4 | 25 1 7 |
|--------------------+--------------------+--------------------|
| 349 345 1 | 457 4579 79 | 6 8 2 |
| 47 247 6 | 3 249 8 | 49 5 1 |
| 49 25 8 | 15 125 6 | 3 7 49 |
+--------------------------------------------------------------+
# 69 eliminations remain
r58c12 <47> UR via s-link <> 4 r8c1
r58c12 <47> UR via s-link <> 4 r8c2
r58c12 <47> UR via s-link <> 7 r5c1 extraneous
r58c12 <47> UR via s-link <> 7 r8c2 extraneous
-plus-
r35c89 <39> UR via s-link <> 3 r3c8
-plus
r13c68 <29> UR via s-link <> 9 r3c6
r13c68 <29> UR via s-link <> 9 r3c8
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Last edited by daj95376 on Sat May 08, 2010 7:20 pm; edited 4 times in total |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat May 08, 2010 6:50 pm Post subject: |
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I am to here: | Code: | +----------------+----------------+----------------+
| 1 8 4 | 6 39 29 | 7 239 5 |
| 2 9 37 | 478 378 5 | 1 34 6 |
| 6 37 5 | 47 1 279 | 8 24 39 |
+----------------+----------------+----------------+
| 5 1 79 | 2 78 3 | 49 6 489 |
| 48 47 279 | 578 6 1 | 25 39 389 |
| 38 6 23 | 9 58 4 | 25 1 7 |
+----------------+----------------+----------------+
| 3479 34 1 | 57 4579 79 | 6 8 2 |
| 479 2 6 | 3 479 8 | 49 5 1 |
| 49 5 8 | 1 2 6 | 3 7 49 |
+----------------+----------------+----------------+ |
Sort of regretting the time I've wasted...
Keith |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat May 08, 2010 8:57 pm Post subject: |
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Sorry folks, but I had a different code set after basics.
| Code: |
*--------------------------------------------------*
| 1 8 4 | 6 39 29 | 7 23 5 |
| 2 9 37 | 478 348 5 | 1 34 6 |
| 6 37 5 | 147 134 27 | 8 234 9 |
|----------------+----------------+----------------|
| 5 1 9 | 2 7 3 | 4 6 8 |
| 478 47 27 | 58 6 1 | 25 9 3 |
| 38 6 23 | 9 58 4 | 25 1 7 |
|----------------+----------------+----------------|
| 34 345 1 | 457 459 79 | 6 8 2 |
| 47 247 6 | 3 24 8 | 9 5 1 |
| 9 25 8 | 15 125 6 | 3 7 4 |
*--------------------------------------------------*
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I did basics again and got the results posted by Keith.
Obviously I messed up........
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun May 09, 2010 1:23 am Post subject: |
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| This was extremely difficult for me, not being solvable with my limited arsenal. I used 6-7 of the usual techniques with a couple of Medusa traps in-between and finished with a Medusa wrap. |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sun May 09, 2010 8:54 am Post subject: |
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| Danny, nice DP My soft squishy organic solver seems programmed to only look for simple URs (and BUGS), I need to look more for these bigger DPs. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun May 09, 2010 11:31 am Post subject: |
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| peterj wrote: | | Danny, nice DP My soft squishy organic solver seems programmed to only look for simple URs (and BUGS), I need to look more for these bigger DPs. |
Hello Peter,
Good luck. My solver handles several techniques, but it doesn't handle anything more complex than URs when it comes to DPs. If it hadn't been for Ted posting a few DPs recently, I probably would still be merrily relying on chains. Now, I find myself staring at grids and searching for DPs. I'm going to find a way to get even with Ted!!! 
Regards, Danny |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Mon May 10, 2010 9:01 pm Post subject: |
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1. Same xy-chain as Peter, pincers at r2c3 and r4c5 means r2c5, r4c3 <> 7
2.(34-8)r2c5=r6c5-(8=3)r6c1-r6c3=(3-7)r2c3=(7-8)r2c4=(8)r2c5
I wonder if one of Luke/Ted's ANPs might work here......? |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue May 11, 2010 1:55 pm Post subject: |
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after basics:
(3)r2c3 - (34)r2c58 = (78)r24c5 - (8=5)r6c5 - (5=2)r6c7 - (2=3)r6c3 - (3)r2c3; q.e.d. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue May 11, 2010 3:30 pm Post subject: |
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| Nice ! I felt that there should be something lurking ! |
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