dailysudoku.com :: View topic - Vanhegan fiendish October 12, 2012

dailysudoku.com
Discussion of Daily Sudoku puzzles

FAQ

Memberlist

Usergroups

Profile

Vanhegan fiendish October 12, 2012

dailysudoku.com Forum Index -> Other puzzles

View previous topic :: View next topic

Author

Message

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Fri Oct 12, 2012 4:52 am Post subject: Vanhegan fiendish October 12, 2012

Code:

*-----------*
|168|...|.73|
|4..|3..|...|
|..9|6..|2.1|
|---+---+---|
|6..|.7.|.9.|
|..5|...|8..|
|.9.|.2.|..6|
|---+---+---|
|9.6|..2|5..|
|...|..1|..9|
|57.|...|312|
*-----------*

Play/Print this puzzle online

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Fri Oct 12, 2012 1:35 pm Post subject:

Code after basics:

Code:

*--------------------------------------------------*
| 1 6 8 | 2 459 459 | 49 7 3 |
| 4 25 27 | 3 1 79 | 69 56 8 |
| 37 35 9 | 6 48 478 | 2 45 1 |
|----------------+----------------+----------------|
| 6 24 12 | 8 7 3 | 14 9 5 |
| 37 34 5 | 1 69 69 | 8 2 47 |
| 8 9 17 | 45 2 45 | 17 3 6 |
|----------------+----------------+----------------|
| 9 1 6 | 47 3 2 | 5 8 47 |
| 2 8 3 | 457 45 1 | 467 46 9 |
| 5 7 4 | 9 68 68 | 3 1 2 |
*--------------------------------------------------*

Here is one for Keith.

(4=9)r1c7-BugLite(45) r168c456[(9)r1c56=(7)r8c4]-(7=4)r7c4-r7c9=r5c9 => -4r4c6

Ted

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Fri Oct 12, 2012 5:02 pm Post subject:

Code:

*-------------------------------------------------------*
| 1 6 8 | 2 459 459 | A49 7 3 |
| 4 25 27 | 3 1 79 | 69 56 8 |
| 37 35 9 | 6 48 478 | 2 45 1 |
|----------------+----------------+--------------------|
| 6 24 12 | 8 7 3 | B14 9 5 |
| 37 34 5 | 1 69 69 | 8 2 C47 |
| 8 9 17 | 45 2 45 | 17 3 6 |
|----------------+----------------+--------------------|
| 9 1 6 | F47 3 2 | 5 8 D47 |
| 2 8 3 | -457 -45 1 | E467 E46 9 |
| 5 7 4 | 9 68 68 | 3 1 2 |
*------------------------------------------------------*

I also played the BUG-Lite. Either A or F=4 due to the 9s in r1 or the 7 in r8c4. Transport 4 from r1c7 to r8c78 via ABCDE; r8c45<>4.

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Fri Oct 12, 2012 6:15 pm Post subject:

tlanglet wrote:

Code after basics:

Code:

Here is one for Keith.

(4=9)r1c7-BugLite(45) r168c456[(9)r1c56=(7)r8c4]-(7=4)r7c4-r7c9=r5c9 => -4r4c6

Ted

Ted,

There's no 4 in r4c6. May I ask where the elimination occurs and what are the pincers? Just trying to see if I can interpret the notation.

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Fri Oct 12, 2012 7:14 pm Post subject:

Code:

+-------------+-------------+-------------+
| 1 6 8 | 2 B459 B459|A49 7 3 |
| 4 25 27 | 3 1 79 | 69 56 8 |
| 37 35 9 | 6 48 478 | 2 45 1 |
+-------------+-------------+-------------+
| 6 24 12 | 8 7 3 |1-4 9 5 |
| 37 34 5 | 1 69 69 | 8 2 F47 |
| 8 9 17 | 45 2 45 | 17 3 6 |
+-------------+-------------+-------------+
| 9 1 6 |D47 3 2 | 5 8 E47 |
| 2 8 3 |C457 45 1 | 467 46 9 |
| 5 7 4 | 9 68 68 | 3 1 2 |
+-------------+-------------+-------------+

Marty,
DP 45 in R168C456.

BC are <79>.
ABCD is an XY-wing 49-79-47. With transport EF, R4C7 <>4.

Keith Cool

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Fri Oct 12, 2012 7:39 pm Post subject:

keith wrote:

ABCD is an XY-wing 49-79-47. With transport EF, R4C7 <>4.

I like it

here is a cousin:

Code:

*--------------------------------------------------*
| 1 6 8 | 2 459 459 |a49 7 3 |
| 4 b25 27 | 3 1 79 |b69 b56 8 |
| 37 35 9 | 6 48 478 | 2 45 1 |
|----------------+----------------+----------------|
| 6 c24 12 | 8 7 3 | 1-4 9 5 |
| 37 34 5 | 1 69 69 | 8 2 47 |
| 8 9 17 | 45 2 45 | 17 3 6 |
|----------------+----------------+----------------|
| 9 1 6 | 47 3 2 | 5 8 47 |
| 2 8 3 | 457 45 1 | 467 46 9 |
| 5 7 4 | 9 68 68 | 3 1 2 |
*--------------------------------------------------*
(4=9)r1c7-(9=2)als:r2c278-(2=4)r4c2 => -4r4c7; stte

Play/Print this puzzle online

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Fri Oct 12, 2012 9:03 pm Post subject:

Except for a typo, my solution is the same as Ted's. I was simply trying to give Marty a different explanation. A decoder ring for the notation, if you will. Keith

Luke451

Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California

Posted: Fri Oct 12, 2012 9:16 pm Post subject:

arkietech wrote:

here is a cousin:

Code:

Play/Print this puzzle online

Hi, Dan. I know you're just trying to "wing" it when you throw in an als like this, but an xy-chain is still just an xy-chain.

Oh, and nice BUG-Lite, guys!

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Fri Oct 12, 2012 9:39 pm Post subject:

I see in light of the comments that I could have transported either pincer and my transport could have been shorter. The result is the same, but I would never in a million years spot that pattern as an XY-Wing.

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Fri Oct 12, 2012 11:12 pm Post subject:

Luke451 wrote:

Hi, Dan. I know you're just trying to "wing" it when you throw in an als like this, but an xy-chain is still just an xy-chain.

Looking at it another way an xy-chain with three xy's is an xy-wing.

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Sat Oct 13, 2012 1:44 am Post subject:

Marty R. wrote:

tlanglet wrote:

Code after basics:

Code:

Here is one for Keith.

(4=9)r1c7-BugLite(45) r168c456[(9)r1c56=(7)r8c4]-(7=4)r7c4-r7c9=r5c9 => -4r4c6

Ted

Ted,

There's no 4 in r4c6. May I ask where the elimination occurs and what are the pincers? Just trying to see if I can interpret the notation.

Marty, sorry about the confusion. My pincers are 4r1c7 and 4r5c9 which deletes the 4 in r4c7, not r4c6. I could claim a typo or insufficient coffee early in the morning but in either case I messed-up.

Ted

aran

Joined: 19 Apr 2010
Posts: 70

Posted: Sat Oct 13, 2012 3:37 pm Post subject:

arkietech wrote:

Luke451 wrote:

Hi, Dan. I know you're just trying to "wing" it when you throw in an als like this, but an xy-chain is still just an xy-chain.

Looking at it another way an xy-chain with three xy's is an xy-wing.

arkitech
On the use of ALS in your formulation : (4=9)r1c7-(9=2)als:r2c278-(2=4)r4c2 => -4r4c7 :
...I would argue that there is no ALS...
That is, when =9r1c7 is posited, the once ALS on the board mutates into an LS (here a resolved LS) in the chain.
In other words
(4=9)r1c7-(9=2)LSr2c278-(2=4)r4c2 => -4r4c7
would better reflect the position, though still putting the relevant information (LS) after the deduction (2r2c2) and still leaving the reader to make that deduction.
One way of making things clearer whilst respecting the logical sequence would be for example :
(4=9)r1c7-9r2c7=(56+2)r2c782-(2=4)r4c2 => -4r4c7
where+is a sign of resolution, and the ordering of the LS indicates which is the resolved cell of interest.

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Sat Oct 13, 2012 5:27 pm Post subject:

aran wrote:

arkietech wrote:

Luke451 wrote:

Hi, Dan. I know you're just trying to "wing" it when you throw in an als like this, but an xy-chain is still just an xy-chain.

Looking at it another way an xy-chain with three xy's is an xy-wing.

How can r2c278 be a locked set when it is three cells with four values (2569)? Pulling the 9 out will make it a locked set but the notation indicates the 9 is there. Confused

Display posts from previous:

	dailysudoku.com Forum Index -> Other puzzles	All times are GMT
Page 1 of 1

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum