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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Wed Jun 03, 2009 5:27 am Post subject: Set XY_03 Puzzle 014 |
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I'm going to take a sabbatical from posting puzzles. (5/5)
Code: | +-----------------------+
| 9 . . | . . . | . 1 5 |
| . . 1 | 4 . . | 8 2 . |
| . 2 3 | . . . | 4 . . |
|-------+-------+-------|
| . 5 . | 8 . . | . . . |
| . . . | . 4 . | . 8 . |
| . . . | . . 7 | . . 1 |
|-------+-------+-------|
| . 3 4 | . . . | . . . |
| 1 8 . | . 3 . | . . 6 |
| 6 . . | . . 4 | . 5 8 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
Code: | r1 Naked Pair <> 67 [r1c456]
r7 Naked Triple <> 279 [r7c456]
r3 b3 Locked Candidate 1 <> 9 [r3c456]
r9 b7 Locked Candidate 1 <> 9 [r9c45]
r8 b8 Locked Candidate 1 <> 9 [r8c7]
c7b6 Locked Candidate 2 <> 9 [r46c8],[r5c9]
c9b7 turbot fish/ER <> 2 [r5c3]
r1 b4 Empty Rectangle <> 6 [r6c7]
r8 b3 Empty Rectangle <> 7 [r3c4]
c5b2 Locked Candidate 1 <> 7 [r9c5]
XYZ-Wing [r5c3]/[r1c3]+[r6c2] <> 6 [r4c3]
r37c89 <79> UR Type 6 <> 9 [r3c8],[r7c9]
r1c8 2-String Kite <> 7 [r4c3]
r7 b4 Empty Rectangle <> 7 [r5c9]
c9b4 Empty Rectangle <> 7 [r7c1]
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Last edited by daj95376 on Fri Jun 26, 2009 10:43 pm; edited 1 time in total |
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storm_norm
Joined: 18 Oct 2007 Posts: 1741
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Posted: Fri Jun 05, 2009 6:28 pm Post subject: |
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Code: | .---------------------.---------------------.---------------------.
| 9 4 *67 | 23 28 238 |*67 1 5 |
| 5 *67 1 | 4 679 69 | 8 2 3 |
| 8 2 3 | 1567 1567 156 | 4 U679 U79 |
:---------------------+---------------------+---------------------:
| 237 5 2679 | 8 1269 12369 | 2679 367 4 |
| 237 1 2679 | 23569 4 23569 | 25679 8 27 |
| 4 *69 8 | 23569 2569 7 | 2569 36 1 |
:---------------------+---------------------+---------------------:
|*27 3 4 | 56 568 568 | 1 U79 U279 |
| 1 8 5 | 279 3 29 | 27 4 6 |
| 6 *-79 279 | 127 127 4 | 3 5 8 |
'---------------------'---------------------'---------------------' |
the UR {79}r37c89 says that neither the 2 in r7c9 or the 6 in r3c8 can both be false.
(7=2)r7c1 - UR79[(2)r7c9 = (6)r3c8] - (6)r1c7 = (6)r1c3 - (6)r2c2 = (6-9)r6c2 = (9)r9c2; r9c2 <> 7 |
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tlanglet
Joined: 17 Oct 2007 Posts: 2468 Location: Northern California Foothills
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Posted: Mon Jun 08, 2009 4:30 am Post subject: |
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I saw the Type 6 UR 79 and employed Norm's approach of using the implication of the UR to form a chain. The one step chain solution I found is:
UR79[(6)r3c8 = (2)r7c9] - (2=7)r7c1 - (7)r9c2 = (7)r2c2 - (7=6)r1c3; r1c7<>6.
Norm, I noticed that you used essentially the same cells for your chain, but in a totally different manner.
Ted |
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storm_norm
Joined: 18 Oct 2007 Posts: 1741
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Posted: Mon Jun 08, 2009 7:11 am Post subject: |
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tlanglet wrote: | I saw the Type 6 UR 79 and employed Norm's approach of using the implication of the UR to form a chain. The one step chain solution I found is:
UR79[(6)r3c8 = (2)r7c9] - (2=7)r7c1 - (7)r9c2 = (7)r2c2 - (7=6)r1c3; r1c7<>6.
Norm, I noticed that you used essentially the same cells for your chain, but in a totally different manner.
Ted |
I like yours better. |
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wapati
Joined: 10 Jun 2008 Posts: 472 Location: Brampton, Ontario, Canada.
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Posted: Mon Jun 08, 2009 10:35 pm Post subject: Re: Set XY_03 Puzzle 014 |
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daj95376 wrote: | I'm going to take a sabbatical from posting puzzles. (5/5) |
I've said, more or less, that, as have you.
From experience I say take the break. |
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