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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Aug 17, 2009 5:27 pm Post subject: Set XY_03 Puzzle 036 |
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Edit: Corrected thread title.
| Code: | +-----------------------+
| 8 . . | . . 6 | . . . |
| . 6 . | . . . | . 8 9 |
| . . 7 | . . . | . 3 6 |
|-------+-------+-------|
| . . . | 4 . 3 | . . . |
| . . . | . 5 8 | . . 1 |
| 1 . . | 6 7 2 | . 5 8 |
|-------+-------+-------|
| . . . | . . . | . 1 . |
| . 4 9 | . . 1 | 8 6 7 |
| . 1 3 | . 6 7 | . 9 4 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
Last edited by daj95376 on Mon Aug 17, 2009 10:55 pm; edited 1 time in total |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Mon Aug 17, 2009 7:41 pm Post subject: |
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A one stepper: | Quote: | | xy-chain (3=4)r2c1-(4=9)r3c1-(9=6)r4c1-(6=2)r5c3-(2=5)r2c3-(5=2)r3c2-(2=1)r3c4-(2=7r2c4-(7=3)r1c4=>r1c2,r2c5<>3 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Aug 17, 2009 9:27 pm Post subject: |
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Another one stepper is an: | Quote: | extended xy-wing 39-4 with pivot 39 in r1c2 and a strong link on 9 in col5 to reach pincer 49 in r7c6 deletes 4 in r2c6
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Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Aug 17, 2009 10:58 pm Post subject: |
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| I corrected the title for this thread. Does anyone want to find the easy DP or either of the two (generalized) M-Wings present? |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Aug 18, 2009 2:02 am Post subject: |
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| Code: | *--------------------------------------------------*
| 8 39 1 | 37 349 6 | 47 2 5 |
| 34 6 *25 | 17 234 *45 | 17 8 9 |
| 49 *25 7 | 12 8 *459 | 14 3 6 |
|----------------+----------------+----------------|
| 69 *58 *58 | 4 1 3 | 69 7 2 |
| 367 27 26 | 9 5 8 | 36 4 1 |
| 1 39 4 | 6 7 2 | 39 5 8 |
|----------------+----------------+----------------|
| 67 78 68 | 25 49 49 | 25 1 3 |
| 25 4 9 | 235 23 1 | 8 6 7 |
| 25 1 3 | 8 6 7 | 25 9 4 |
*--------------------------------------------------*
is this the DP? r3c6=9 |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Tue Aug 18, 2009 3:19 am Post subject: |
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| arkietech wrote: | | Code: | *--------------------------------------------------*
| 8 39 1 | 37 349 6 | 47 2 5 |
| 34 6 *25 | 17 234 *45 | 17 8 9 |
| 49 *25 7 | 12 8 *459 | 14 3 6 |
|----------------+----------------+----------------|
| 69 *58 *58 | 4 1 3 | 69 7 2 |
| 367 27 26 | 9 5 8 | 36 4 1 |
| 1 39 4 | 6 7 2 | 39 5 8 |
|----------------+----------------+----------------|
| 67 78 68 | 25 49 49 | 25 1 3 |
| 25 4 9 | 235 23 1 | 8 6 7 |
| 25 1 3 | 8 6 7 | 25 9 4 |
*--------------------------------------------------*
is this the DP? r3c6=9 |
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no.
if a DP was involved in those cells, it would need to contain only three candidates. {2,5,8}
you are trying to form it with 4 candidates. {2,4,5,8}
look something like this.
| Code: | +-------+---------+--------+
| . . . | . . . | . . . |
| . . . | . . 25 | . 28 . |
| . . . | . 25 . | . 28 . |
+-------+---------+--------+
| . . . | . 58 58 | . . . |
| . . . | . . . | . . . |
| . . . | . . . | . . . |
+-------+---------+--------+ |
this situation can't exist.
one (or more) of those cells has to have an extra candidate.
like in my next post.
Last edited by storm_norm on Tue Aug 18, 2009 3:27 am; edited 3 times in total |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Tue Aug 18, 2009 3:21 am Post subject: |
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| Code: | .---------------.---------------.---------------.
| 8 39 1 | 37 349 6 | 47 2 5 |
| 34 6 25 | 17 234 45 | 17 8 9 |
| 49 25 7 | 12 8 459 | 14 3 6 |
:---------------+---------------+---------------:
| 69 58 58 | 4 1 3 | 69 7 2 |
| 367 27 26 | 9 5 8 | 36 4 1 |
| 1 39 4 | 6 7 2 | 39 5 8 |
:---------------+---------------+---------------:
| 67 78 68 |*25 49 49 |*25 1 3 |
|*25 4 9 |*235 23 1 | 8 6 7 |
|*25 1 3 | 8 6 7 |*25 9 4 |
'---------------'---------------'---------------' |
the marked BUGlite says that r8c4 can't be {2,5} |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Aug 18, 2009 1:30 pm Post subject: |
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| storm_norm wrote: | | the marked BUGlite says that r8c4 can't be {2,5} |
Thanks, Norm |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Tue Aug 18, 2009 6:06 pm Post subject: |
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Dan,
have you ventured into any of the BUGlite threads on other forums? in some of the threads there are some nice diagrams of the different patterns. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Aug 18, 2009 6:49 pm Post subject: |
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| storm_norm wrote: | Dan,
have you ventured into any of the BUGlite threads on other forums? in some of the threads there are some nice diagrams of the different patterns. |
Apparently I need to be more adventurist. 
Thanks Norm |
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