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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Mar 13, 2011 6:23 am Post subject: Puzzle 11/03/13: ~ Moderate |
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| Code: | +-----------------------+
| . . . | . . 5 | . . . |
| . 1 3 | 4 . . | . . . |
| . 5 4 | . . . | . 6 7 |
|-------+-------+-------|
| . 2 . | 8 . 6 | . . . |
| . . . | . 9 . | . 8 . |
| 3 . . | 7 . 1 | 6 9 . |
|-------+-------+-------|
| . . . | . . 7 | 9 . . |
| . . 5 | . 3 9 | . . 8 |
| . . 9 | . . . | . 4 6 |
+-----------------------+
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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: Sun Mar 13, 2011 4:50 pm Post subject: |
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Code after basics
| Code: | +-------------------------------------------------------*
| 8 9 67 | 12 67 5 | 34 123 1234 |
| 67 1 3 | 4 67 28 | 258 25 9 |
| 2 5 4 | 9 18 3 | 18 6 7 |
|-------------------+-------------------+-------------------|
| 9 2 17 | 8 5 6 | 34 137 134 |
| 5 67 167 | 3 9 4 | 127 8 12 |
| 3 4 8 | 7 2 1 | 6 9 5 |
|-------------------+-------------------+-------------------|
| 16 8 2 | 156 4 7 | 9 135 13 |
| 4 67 5 | 126 3 9 |#127 12=7 8 |
| 17 3 9 | 125 18 28 | 1257 4 6 |
*-----------------------------------------------------------* |
Notice the 'Almost" XYZ-wing(127)r8c7 with fin digit (7)r8c8 formed by grouping r8c8 as (12=7)
Assuming r8c8=12; r7c89<>1
(1)r8c7
(2)r8c7-(2=1)r8c8
(7)r8c7-(7=6)r8c2-(6=1)r7c1
Now, if r8c8=7 then: (7)r8c8-(7=6)r8c2-(6=1)r7c1; r7c89<>1
The puzzle is completed by several moves including coloring (7).
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun Mar 13, 2011 5:58 pm Post subject: |
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Ted, that is one crazy "almost XYZ-Wing". You have a fin cell on one pincer and a pseudo-cell for the other pincer. Aaaagh! Personally, I see it as an "almost XY-Wing" with an ALS for one pincer:
| Code: | (6)r8c2 - (6= 1)r7c1 => r7c89<>1
(7)r8c2 - (7=21)r8c78 => r7c89<>1
+--------------------------------------------------------------+
| 8 9 67 | 12 67 5 | 34 123 1234 |
| 67 1 3 | 4 67 28 | 258 25 9 |
| 2 5 4 | 9 18 3 | 18 6 7 |
|--------------------+--------------------+--------------------|
| 9 2 17 | 8 5 6 | 34 137 134 |
| 5 67 167 | 3 9 4 | 127 8 12 |
| 3 4 8 | 7 2 1 | 6 9 5 |
|--------------------+--------------------+--------------------|
| p16 8 2 | 156 4 7 | 9 35-1 3-1 |
| 4 v67 5 | 126 3 9 | p12=7 p12=7 8 |
| 17 3 9 | 125 18 28 | 1257 4 6 |
+--------------------------------------------------------------+
# 50 eliminations remain
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An NP() chain:
| Code: | (12=7)r8c78 - (7=6)r8c2 - (6=1)r7c1 => r7c89<>1
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Mar 13, 2011 6:27 pm Post subject: |
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| daj95376 wrote: | Ted, that is one crazy "almost XYZ-Wing". You have a fin cell on one pincer and a pseudo-cell for the other pincer. Aaaagh! Personally, I see it as an "almost XY-Wing" with an ALS for one pincer:
| Code: | (6)r8c2 - (6= 1)r7c1 => r7c89<1> r7c89<1> r7c89<>1
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Danny,
I see your axy-wing but at the time I spotted the pattern, I was looking for xyz-wings and therefore posted it as such.
And of course, I like the anp(). I had been looking for a pattern that had a fin in both cells but still provided the deletion, but I missed it here. 
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Mar 14, 2011 1:15 am Post subject: |
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It was a fun six-step BBDB for me.
Type 1 UR
XY-Wing
ER
DP
Skyscraper
W-Wing |
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