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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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 Posted: Sat Sep 01, 2012 6:13 am Post subject: vanhegan fiendish April 18, 2012 |
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Watch out for a Purple Cow!
| Code: |
*-----------*
|...|..9|..7|
|.2.|7..|.1.|
|74.|..3|95.|
|---+---+---|
|6.4|..8|.3.|
|91.|.3.|.48|
|.3.|1..|5.9|
|---+---+---|
|.81|3..|.95|
|.9.|..6|.7.|
|3..|9..|...|
*-----------*
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Sep 01, 2012 4:49 pm Post subject: |
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| Code: | +---------------+----------------+-------------+
| 1 D56 3 | 2458 2468 9 | 248 28 7 |
| C58 2 9 | 7 468 45 | 348 1 346 |
| 7 4 B68 | -28 1 3 | 9 5 A26 |
+---------------+----------------+-------------+
| 6 F57 4 | G25 9 8 | 127 3 1-2 |
| 9 1 257 | 6 3 257 | 27 4 8 |
| 28 3 278 | 1 247 247 | 5 6 9 |
+---------------+----------------+-------------+
| 24 8 1 | 3 247 247 | 6 9 5 |
| 245 9 25 | 248 248 6 | 13 7 13 |
| 3 E67 67 | 9 5 1 | 248 28 24 |
+---------------+----------------+-------------+ |
Forgot what a Purple Cow is. Maybe this is a Green Guernsey or Jade Jersey, or maybe an XY-Chain, a little longer than I'd like, but I take what I can get.
R3c9=6-->r4c4=2. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Sep 01, 2012 5:44 pm Post subject: |
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| Marty R. wrote: | | Forgot what a Purple Cow is. |
No one knows what it is. 
It is supposedly a name for one of the un-named wings. If you ever see one -- let me know.
| Code: |
*-----------------------------------------------------------*
| 1 c56 3 | 2458 d468-2 9 | 248 28 7 |
| 58 2 9 | 7 468 45 | 348 1 346 |
| 7 4 b68 |a28 1 3 | 9 5 26 |
|-------------------+-------------------+-------------------|
| 6 57 4 | 25 9 8 | 127 3 12 |
| 9 1 257 | 6 3 257 | 27 4 8 |
| 28 3 278 | 1 247 247 | 5 6 9 |
|-------------------+-------------------+-------------------|
| 24 8 1 | 3 247 247 | 6 9 5 |
| 245 9 25 | 248 248 6 | 13 7 13 |
| 3 67 67 | 9 5 1 | 248 28 24 |
*-----------------------------------------------------------*
Hybrid-wing
(2=8)r3c4-(8=6)r3c3-r1c2=(6)r1c5 => r1c5<>2; lclste
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Sep 01, 2012 9:34 pm Post subject: |
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| arkietech wrote: | | Marty R. wrote: | | Forgot what a Purple Cow is. |
No one knows what it is.
It is supposedly a name for one of the un-named wings. If you ever see one -- let me know.
|
Hmmm. I checked the pattern listed for a Purple Cow, and came away with what I'm calling an L2-Wing. However, the Purple Cow pattern only indicates one of the two possible eliminations.
| Code: | . . . | . . . | . . .
. *---1---*---2---* .
. . . | . . . | . . .
------+-------+------
. . . | . . . | . . .
. *-------1-------*#.
. . . | . . . | . . .
------+-------+------
. . . | . . . | . . .
. . . | . . . | . . .
. . . | . . . | . . .
(1)r5c8 = (1)r5c2 - (1)r2c2 = (1-2)r2c5 = (2)r2c8 => r2c8<>1, r5c8<>2 |
8. I-Never-Saw-A-Purple-Cow-I-Hope-I-Never-See-One-But-I-Can-Tell-You-This-Right-Now-I'd-Rather-See-Than-Be-One
# =/= 2
| Code: | L2-Wing: (X)a = (X)b - (X)c = (X-Y)d = (Y)e
"a" and "e" in same unit; a<>Y, e<>X
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Sep 01, 2012 10:22 pm Post subject: |
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| daj95376 wrote: | Hmmm. I checked the pattern listed for a Purple Cow, and came away with what I'm calling an L2-Wing. However, the Purple Cow pattern only indicates one of the two possible eliminations.
| Code: | . . . | . . . | . . .
. *---1---*---2---* .
. . . | . . . | . . .
------+-------+------
. . . | . . . | . . .
. *-------1-------*#.
. . . | . . . | . . .
------+-------+------
. . . | . . . | . . .
. . . | . . . | . . .
. . . | . . . | . . .
(1)r5c8 = (1)r5c2 - (1)r2c2 = (1-2)r2c5 = (2)r2c8 => r2c8<>1, r5c8<>2 |
8. I-Never-Saw-A-Purple-Cow-I-Hope-I-Never-See-One-But-I-Can-Tell-You-This-Right-Now-I'd-Rather-See-Than-Be-One
# =/= 2
| Code: | L2-Wing: (X)a = (X)b - (X)c = (X-Y)d = (Y)e
"a" and "e" in same unit; a<>Y, e<>X
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Thanks Danny,
do you know of an example?
I will start looking.  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sun Sep 02, 2012 2:32 am Post subject: |
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| daj95376 wrote: | | http://www.dailysudoku.com/sudoku/forums/viewtopic.php?p=33809 |
| Code: | *-----------------------------------------------------------------------------*
| 7 138 1368 | 468 2 9 | 134 14 5 |
| 4 2389 3589 | 7 1 58 | 39 6 29 |
| 15 129 1569 | 3 46 45 | 1479 8 279 |
|-------------------------+-------------------------+-------------------------|
| 9 178 1478 | 5 467 47 | 2 3 b678 |
|d36 37 347 | 1469 8 2 | 1579 1579 c679 |
|e6-8 5 2 | 169 3679 37 |a1789 179 4 |
|-------------------------+-------------------------+-------------------------|
| 125 4 135789 | 89 379 6 | 5789 2579 789 |
| 25 6 5789 | 489 479 1 | 45789 24579 3 |
| 38 3789 3789 | 2 5 3478 | 6 479 1 |
*-----------------------------------------------------------------------------*
L2-wing
(8)r6c7=(8-6)r4c9=r5c9-r5c1=(6)r6c1 => r6c1<>8; stte
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I am familiar with this L2-wing
a=(a-b)=b-b=b (the first and last ab must be in the same cell)
The pattern you showed was:
a=(a-b)=(b-a)=a (first and last a are in the same chute, different cells)
I have never seen one of these  --a real purple cow! 
Help me find one! |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Sep 02, 2012 3:43 am Post subject: |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sun Sep 02, 2012 12:12 pm Post subject: |
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Thanks for finding the purple cow Marty!
I discovered the pattern I was confused with was really a skyscrapper. I had looked at Danny's pattern and saw something entirely different.
A Purple Cow is just a plain old vanilla L2-wing. I just didn't realize what they were.
It is amazing what morning will bring. |
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