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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Sep 14, 2010 6:12 am Post subject: Puzzle 10/09/14: A |
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| Code: | +-----------------------+
| 2 . . | . 8 . | . . 4 |
| . . . | 3 . . | . . . |
| . . . | . . 7 | 5 2 . |
|-------+-------+-------|
| . . . | 1 . . | . . . |
| . . . | . 3 8 | . 4 . |
| . 5 8 | . 7 4 | . 1 6 |
|-------+-------+-------|
| . . 1 | . . . | . 6 . |
| 8 . 6 | . 2 3 | . 9 . |
| 3 . . | . . 1 | 4 . 8 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Sep 14, 2010 9:53 am Post subject: |
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| Quote: | X Wing (5)R58 : => r149c49<>5
Kite (5)R1C1 : => r7c6<>5
Kite (6)R3C6 : => r4c1<>6
Kite (9)R3C4 : => r5c9<>9 [extraneous]
XY Wing (5-69), pivot at r5c4 : => r1c6<>6
M Wing (57) : (75)R9C8 5B6 7R5 : => r8c7<>7 |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Tue Sep 14, 2010 5:15 pm Post subject: |
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Just polish this one off quickly before a G&T ... I thought! I played many more moves than this and probably still some extraneous ones..
| Quote: | x-wing(5)
skyscraper(5)
flightless m-wing(16) ; (6=1)r5c2 - r5c1=(1-6)r3c1=r3c5 transport -(6)r1c6=r4c6 ; r4c1<>6, r5c4<>6
xy-wing(69-5) r1c4 ; r4c6<>5
xy-wing(59-7) r5c4 ; r8c7<>7
BUG+1 ; r2c7=7 |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Sep 14, 2010 8:27 pm Post subject: |
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Hmmm! Normally, when my solver finds concurrent results for a technique, one or more of the occurrences turn out to be extraneous. After seeing the posted solutions, I checked the puzzle and found only two extraneous step among those listed by my solver. In addition, the Kite for <9> is important but obscure to locate.
| Code: | r58 X-Wing <> 5 r19c4,r4c9
turbot/Multiple Colors <> 5 r2c1,r7c6,r9c3
r3c6 2-String Kite <> 6 r4c1
r1c1 2-String Kite <> 7 r4c7 extraneous
r3c4 2-String Kite <> 9 r5c9
<69+5> XY-Wing r1c4/r1c6+r5c4 <> 5 r4c6 complementary
<59+6> XY-Wing r5c4/r1c4+r4c6 <> 6 r1c6 extraneous
<59+7> XY-Wing r5c4/r5c7+r8c4 <> 7 r8c7
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Sep 15, 2010 1:28 am Post subject: |
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| I used eight moves, with a Skyscraper on 9 finishing it off. |
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