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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Aug 16, 2009 1:20 am Post subject: Set XY_03 Puzzle 035 |
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After basics, my solver found two steps. I was able to find a workaround to prevent the second step from being an XY-Chain.
| Code: | +-----------------------+
| 3 . 6 | 7 . . | . 5 . |
| . 2 7 | . 1 6 | . . 3 |
| 5 1 4 | 3 . . | . . 7 |
|-------+-------+-------|
| 4 . 1 | 6 . . | . 7 . |
| . 7 . | . 9 . | . . . |
| . 6 . | . . 7 | . . . |
|-------+-------+-------|
| . . . | . . . | . . 1 |
| 6 . . | 2 . . | . . . |
| . 8 9 | . . . | 2 . 6 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sun Aug 16, 2009 3:34 am Post subject: |
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| Code: | .------------------.------------------.------------------.
| 3 9 6 | 7 248 248 | 1 5 28 |
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
:------------------+------------------+------------------:
| 4 35 1 | 6 235 23 | 89 7 89 |
| 2 7 358 | 18 9 34 | 3456 16 45 |
| 9 6 358 | 18 345 7 | 345 12 245 |
:------------------+------------------+------------------:
| 7 345 2 | 9 6 38 | 45 48 1 |
| 6 345 35 | 2 38 1 | 7 489 459 |
| 1 8 9 | 4 7 5 | 2 3 6 |
'------------------'------------------'------------------' |
(8=9)r4c9 - (9)r4c7 = (9)r2c7 - (9=4)r2c8 - (4=8)r7c8 - (8)r7c6 = (8)r1c6; r1c1 <> 8
leaves a BUG+1 grid and places 3 in r8c2
Last edited by storm_norm on Tue Aug 18, 2009 5:55 am; edited 1 time in total |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Aug 16, 2009 7:05 pm Post subject: |
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Starting from Norm's grid, a finned x-wing on 3 in r47c26 brings you to:
| Code: |
*--------------------------------------------------*
| 3 9 6 | 7 4 28 | 1 5 28 |
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
|----------------+----------------+----------------|
| 4 35 1 | 6 235 23 | 89 7 89 |
| 2 7 38 | 18 9 4 | 36 16 5 |
| 9 6 358 | 18 35 7 | 34 12 24 |
|----------------+----------------+----------------|
| 7 34 2 | 9 6 38 | 5 48 1 |
| 6 345 35 | 2 38 1 | 7 489 49 |
| 1 8 9 | 4 7 5 | 2 3 6 |
*--------------------------------------------------* |
At this point, there is a BUG+4 condition that solves the puzzle.
r4c5=3, or
r6c3=3, or
r8c2=3, or
r8c8=4.
All four conditions imply r8c5=8.
Ted |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sun Aug 16, 2009 9:38 pm Post subject: |
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I don't see r8c5=8 with r6c3=3? Can you help? | Code: | *--------------------------------------------------*
| 3 9 6 | 7 4 28 | 1 5 28 |
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
|----------------+----------------+----------------|
| 4 35 1 | 6 235 23 | 89 7 89 |
| 2 7 38 | 18 9 4 | 36 16 5 |
| 9 6 358 | 18 35 7 | 34 12 24 |
|----------------+----------------+----------------|
| 7 34 2 | 9 6 38 | 5 48 1 |
| 6 345 35 | 2 38 1 | 7 489 49 |
| 1 8 9 | 4 7 5 | 2 3 6 |
*--------------------------------------------------* |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Aug 17, 2009 12:00 am Post subject: |
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| arkietech wrote: | I don't see r8c5=8 with r6c3=3? Can you help? | Code: | *--------------------------------------------------*
| 3 9 6 | 7 4 28 | 1 5 28 |
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
|----------------+----------------+----------------|
| 4 35 1 | 6 235 23 | 89 7 89 |
| 2 7 38 | 18 9 4 | 36 16 5 |
| 9 6 358 | 18 35 7 | 34 12 24 |
|----------------+----------------+----------------|
| 7 34 2 | 9 6 38 | 5 48 1 |
| 6 345 35 | 2 38 1 | 7 489 49 |
| 1 8 9 | 4 7 5 | 2 3 6 |
*--------------------------------------------------* |
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Dan, I did not initially see the the connection, but then "Jackpot"
(3)r6c3 - (3=4)r6c7 - (4)r6c9 = (4)r8c9 - (4=8)r7c8 - (8=3)r7c6 - (3=8)r8c5
Ted |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Mon Aug 17, 2009 12:20 am Post subject: |
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| tlanglet wrote: | | (3)r6c3 - (3=4)r6c7 - (4)r6c9 = (4)r8c9 - (4=8)r7c8 - (8=3)r7c6 - (3=8)r8c5 |
Works for me. Thanks  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Aug 17, 2009 4:57 am Post subject: |
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Finned X-Wing and BUG+4 were my results as well. Slightly different take on ...
| Code: | BUG+4
[r4c5,r6c3,r8c2]=3 => [r4c2]=5
[r8c8]=4 [r8c9]<>4 [r6c9]=4 [r6c7]=3 [r6c5]=5 [r6c3]<>5 => [r4c2]=5
+-----------------------------------------------------+
| 3 9 6 | 7 4 28 | 1 5 28 |
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
|-----------------+-----------------+-----------------|
| 4 35 1 | 6 25+3 23 | 89 7 89 |
| 2 7 38 | 18 9 4 | 36 16 5 |
| 9 6 58+3 | 18 35 7 | 34 12 24 |
|-----------------+-----------------+-----------------|
| 7 34 2 | 9 6 38 | 5 48 1 |
| 6 45+3 35 | 2 38 1 | 7 89+4 49 |
| 1 8 9 | 4 7 5 | 2 3 6 |
+-----------------------------------------------------+
# 34 eliminations remain
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Aug 19, 2009 12:47 am Post subject: |
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| Quote: | Starting from Norm's grid, a finned x-wing on 3 in r47c26 brings you to:
| Code: | *--------------------------------------------------*
| 3 9 6 | 7 4 28 | 1 5 28 |
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
|----------------+----------------+----------------|
| 4 35 1 | 6 235 23 | 89 7 89 |
| 2 7 38 | 18 9 4 | 36 16 5 |
| 9 6 358 | 18 35 7 | 34 12 24 |
|----------------+----------------+----------------|
| 7 34 2 | 9 6 38 | 5 48 1 |
| 6 345 35 | 2 38 1 | 7 489 49 |
| 1 8 9 | 4 7 5 | 2 3 6 |
*--------------------------------------------------* |
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An XY-Chain, as in the thing that Danny did a workaround to avoid, says that r7c2 or r8c9 must be=4, finishing the puzzle. |
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strmckr
Joined: 18 Aug 2009
Posts: 64
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| Posted: Thu Aug 20, 2009 6:28 am Post subject: |
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or how about after the finned xwing brings it to here:
| Code: | .-------------.-------------.-------------.
| 3 9 6 | 7 4 8-2 | 1 5 28@|
| 8 2 7 | 5 1 6 | 49 49 3 |
| 5 1 4 | 3 28 9 | 68 26 7 |
:-------------+-------------+-------------:
| 4 35 1 | 6 235 23@| 89 7 89@|
| 2 7 38 | 18 9 4 | 36 16 5 |
| 9 6 358 | 18 35 7 | 34 12 24 |
:-------------+-------------+-------------:
| 7 34 2 | 9 6 38@| 5 48@ 1 |
| 6 345 35 | 2 38 1 | 7 489 49@|
| 1 8 9 | 4 7 5 | 2 3 6 |
'-------------'-------------'-------------' |
use:
Death Blossom: [r7c8], -4- r148c9 {2489}, -8- r47c6 {238} => r1c6<>2 {leaves all singles}
i guess it can be viewed as an xy chain as well  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Thu Aug 20, 2009 11:31 am Post subject: |
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| strmckr wrote: | Death Blossom: [r7c8], -4- r148c9 {2489}, -8- r47c6 {238} => r1c6<>2 {leaves all singles}
i guess it can be viewed as an xy chain as well |
Hello Chris and welcome to the forum.
Most of the users here are manual solvers and it's unlikely that more than a few would ever use Death Blossom in a solution.
For me, the challenge is to find puzzles/solutions that are solvable/understandable by most.
Regards, Danny
BTW: I "look it up" |
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strmckr
Joined: 18 Aug 2009
Posts: 64
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| Posted: Thu Aug 20, 2009 12:43 pm Post subject: |
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I'm a manual solver as well 
I usually use complex moves that few people know about...
as Im sure aware of from other sites...
{and i cant write chains correctly ever solvers help with that...}
for me a Death blossom was the simplest approach. {note: mike baker from players form created and named this years back}
2 almost locked sets.. intersection being the elimination.
or xy chain from the marked cells.....
but your correct few would ever use it |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Thu Aug 20, 2009 3:42 pm Post subject: |
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I looked at the referenced page and believe there is a typo.
| Quote: | | Reversing direction will help illuminate the Death Blossom idea since we start with green “stem” cell. G8 with {3/5} must be able to see at least two ALSs which contain all its candidates. It is important that the 3 in G9 can see all of the 3’s in the yellow |
That should read "G9 with {3/5}", should it not?  |
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strmckr
Joined: 18 Aug 2009
Posts: 64
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| Posted: Thu Aug 20, 2009 8:25 pm Post subject: |
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definitely a typo nice catch wapiti...
i'll leave a message for Stuart Andrews to correct it. (scanraid.com) |
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