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Puzzle 10/04/30 (J) Salsa

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Fri Apr 30, 2010 8:28 am Post subject: Puzzle 10/04/30 (J) Salsa

Code:

+-----------------------+
| . . . | 1 . . | . . . |
| . 2 . | 7 . 5 | . 8 . |
| . . 1 | . 2 8 | . . 6 |
|-------+-------+-------|
| 6 3 . | . 7 1 | . 5 . |
| . . 9 | 5 . . | . 4 . |
| . 4 5 | 6 . . | . 1 . |
|-------+-------+-------|
| . . . | . . . | 5 . . |
| . 1 . | 3 5 7 | . . . |
| . . 6 | . . . | . . 1 |
+-----------------------+

Play this puzzle online at the Daily Sudoku site

tlanglet

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

Posted: Fri Apr 30, 2010 3:06 pm Post subject:

Three steps

Quote:

MUG349[(8)r6c5 = (2)r6c6]r169c56-r6c1=r4c3-(2=89)r4c79; r6c79<>8

(3=8)r5c5-MUG349[(8)r6c5 = (2)r6c6]r169c56-(2=3)r5c6; r5c9<>3
(In hindsight, this move is not needed to complete the puzzle, but it was fun to find.)

Finned x-wing 4 r38c17; r8c3<>4

Kite 7 hinge box4; r7c9<>7

Ted

peterj

Joined: 26 Mar 2010
Posts: 974
Location: London, UK

Posted: Fri Apr 30, 2010 4:45 pm Post subject:

This was my play...

Quote:

kite(4); r8c3<>4
kite(7); r7c9<>7
kite(8) extended r7c4=r7c9; r4c9<>8
xy-chain (4=3)r2c9-(3=7)r3c8-(7=2)r7c8-(2=8)r7c4-(8=4)r7c9; r9c8<>4
xy-wing(289); r8c3<>8

Not sure if all the kites are needed...

Ted, where can I found out about MUGs??!

tlanglet

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

Posted: Fri Apr 30, 2010 6:39 pm Post subject:

peterj wrote:

Ted, where can I found out about MUGs??!

Peter, I am the last one to ask about URs, MUGs, DPs, etc; I a trying to learn myself. The last post on this thread is a list offered by Luke.
If you figure things out, please be my mentor.

Ted

peterj

Joined: 26 Mar 2010
Posts: 974
Location: London, UK

Posted: Fri Apr 30, 2010 9:25 pm Post subject:

Thanks. I started coming to this forum a few months ago and have learnt a lot from all you guys. It's advanced enough to be challenging but I feel within my reach! I'll follow your link

Luke451

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

Posted: Sat May 01, 2010 12:07 am Post subject:

tlanglet wrote:

peterj wrote:

Ted, where can I found out about MUGs??!

Peter, I am the last one to ask about URs, MUGs, DPs, etc; I a trying to learn myself. The last post on this thread is a list offered by Luke.
If you figure things out, please be my mentor.

Ted

I saw that DP too, Ted. Didn't even find it tiresome.... Wink

Code:

*-----------------------------------------------------------*
| 78 6 78 | 1 *34 *34 | 2 9 5 |
| 9 2 34 | 7 6 5 | 1 8 34 |
| 34 5 1 | 9 2 8 | 347 37 6 |
|-------------------+-------------------+-------------------|
| 6 3 28 | 4 7 1 | 89 5 289 |
| 1 78 9 | 5 38 23 | 6 4 2378 |
| 278 4 5 | 6 *389 *239 | 378 1 2378 |
|-------------------+-------------------+-------------------|
| 3478 9 3478 | 28 1 6 | 5 27 478 |
| 248 1 248 | 3 5 7 | 489 6 489 |
| 5 78 6 | 28 *49 *49 | 378 237 1 |
*-----------------------------------------------------------*

It's my understanding that this pattern is a Bug-Lite, though. A MUG needs to be the overlay of more than one Bug-Lite, and you haven't got that here. Personally, I call it "The Marty DP." Smile

Like I said last week, I'm thinking about just labeling everything a DP so I don't have to struggle with the nomenclature. Bug-Lites, MUGs and larger than UR DPs are among the most commonly mislabeled patterns on the Sudokuscape, IMO.

ronk

Joined: 07 May 2006
Posts: 398

Posted: Sat May 01, 2010 11:47 am Post subject:

Luke451 wrote:

It's my understanding that this pattern is a Bug-Lite, though. A MUG needs to be the overlay of more than one Bug-Lite, and you haven't got that here.

Like I said last week, I'm thinking about just labeling everything a DP so I don't have to struggle with the nomenclature. Bug-Lites, MUGs and larger than UR DPs are among the most commonly mislabeled patterns on the Sudokuscape, IMO.

Agree on the BUG-Lite term here. Haven't verbalized this before, but (I think) my working definition of the difference between MUG and BUG-Lite is ...

Code:

If a uniqueness pattern (UP) contains at least three UP digits (a,b,c ...) and at least one of the UP cells contains three or more UP digits it's a MUG, otherwise it's a BUG-Lite.

That's a mouthful, but it's not really that hard to apply. BTW a MUG with just one UP cell with three or more UP digits may not actually exist.

tlanglet

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

Posted: Sat May 01, 2010 1:08 pm Post subject:

Luke451 wrote:

Like I said last week, I'm thinking about just labeling everything a DP so I don't have to struggle with the nomenclature.

May I move into your camp? That will resolve the nomenclature issue so my only remaining DP concern will be determining if the configuration is VALID!

Ted

Marty R.

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

Posted: Sun May 09, 2010 8:52 pm Post subject:

Quote:

Personally, I call it "The Marty DP."

I'll call it that too. This MUG/BUG stuff has my head swimming!!

DP 34-39-49, r6c6<>2, r6c5=8
XY-Wing (287)
M-Wing (37)
Remote Pairs (78)

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