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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Feb 06, 2011 3:37 pm Post subject: Puzzle 11/02/06 Uncooperative |
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| Code: | +-----------------------+
| 6 2 . | . . 9 | 3 . . |
| 4 . 9 | . . 1 | . 2 8 |
| . 8 7 | . . . | 9 . 1 |
|-------+-------+-------|
| . . . | 7 . . | . . 9 |
| . . . | . 4 . | . . 2 |
| 8 9 . | . . 2 | . . . |
|-------+-------+-------|
| 9 . 8 | . . . | 2 . . |
| . 4 . | . . . | . 1 5 |
| . 1 2 | 4 8 . | . 9 6 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sun Feb 06, 2011 5:50 pm Post subject: |
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Your title caused me to stop before going down the turbot route...
Two wings...
| Quote: | w-wing(56) with transport ; (6=5)r3c8 -r2c7=r2c2- (5=6)r7c2 -r8c3=r8c6 ; r5c6<>6
w-wing(36) ; (3=6)r4c2 -r4c6=r8c6- (6=3)r8c3 ; r456c3<>3 |
though I actually saw this one-stepper first as the second wing was pretty signposted...
| Quote: | almost w-wing(36)
w-wing(36)[(3=6)r4c2 -r4c6=r8c6- (6=3)r8c3]=(6)r5c6 - (6=5)r5c7 - r2c7=(5-3)r2c2=r4c2 ; r456c3<>3 |
Another nice two-step is...
| Quote: | type-1 ADP(47-37-34)r167c89 ; r6c8<>37
colouring(5)/x-chain(5) ; (5)r3c8=r2c7 - r2c2=r7c2 - r7c4=r6c4 ; r6c8<>5 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Feb 07, 2011 5:44 am Post subject: |
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DP 47-37-34 in boxes 369; r6c8<>37
A rather long XY-Chain in which the 6 in r6c8 proved a 5 in r7c4; r6c4<>5 |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Feb 07, 2011 9:08 am Post subject: |
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| Although I found the DP interesting, my solver doesn't find them ... so its solution was a Kite on <6> and a 7-cell XY-Chain (because I have Coloring disabled as a technique). |
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