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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Dec 18, 2009 4:49 pm Post subject: Puzzle NR 09/12/18 (A) |
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| Code: | +-----------------------+
| . . . | 3 7 . | . . 2 |
| . . . | . . . | . . . |
| . . 5 | . . . | 6 8 . |
|-------+-------+-------|
| 5 . . | . . 8 | . . 6 |
| 8 . . | . 9 . | 4 7 . |
| . . . | 4 . 6 | . 3 . |
|-------+-------+-------|
| . . 7 | . 2 . | 8 . 3 |
| . . 2 | . 6 3 | . 1 . |
| 3 . . | 8 . . | 2 . 9 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Dec 19, 2009 2:49 pm Post subject: |
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After basics:
| Code: | *--------------------------------------------------------------------*
| 6 149 8 | 3 7 1459 | 15 459 2 |
| 12479 12479 149 | 6 8 12459 | 3 459 1457 |
| 12479 3 5 | 129 14 1249 | 6 8 147 |
|----------------------+----------------------+----------------------|
| 5 149 149 | 7 3 8 | 19 2 6 |
| 8 6 3 | 125 9 12 | 4 7 15 |
| 27 27 19 | 4 15 6 | 159 3 8 |
|----------------------+----------------------+----------------------|
| 149 1459 7 | 159 2 149 | 8 6 3 |
| 49 8 2 | 59 6 3 | 7 1 45 |
| 3 145 6 | 8 145 7 | 2 45 9 |
*--------------------------------------------------------------------*
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A type 3 UR 27 in r26c12 creates a pseudocell 149 which forms a subset with the 149 in cells r1c2 & r2c3 to delete 149 in r3c1.
a x-wing on 5,
an AIC by extending the vertex of a potential xy-wing 1-45. (4=1)r3c5 - (1=5)r6c5 - (5)r9c5 = (5)r9c8 - (5=4)r8c9; r3c9<>4.
flightless xy-wing 1-47 with vertex in r3c9 plus transport,
x-wing on 4 r19c28,
BUG+2 forces r5c9=5 to complete the puzzle.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Dec 20, 2009 4:24 am Post subject: |
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| I had fun but it took me a million moves. X-Wings, W-Wing, URs, XYZ-Wing and a few colorings. I noticed a triple late and who knows if not noticing it earlier caused me to use more moves. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun Dec 20, 2009 2:44 pm Post subject: |
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This is the first puzzle from a set generated by tweaking my puzzle generator. Because it's so involved, I'll go back to the previous version of my puzzle generator for future puzzles.
| Code: | b4 Naked Triple <> 149 r6c12 -or-
r6 Naked Triple <> 159 r6c12
c6b2 Locked Candidate 1 <> 5 r57c6
c7b6 Locked Candidate 1 <> 9 r1c7
c2 Naked Quad <> 1459 r2c2
r58 X-Wing <> 5 r2c9,r7c4
c1b7 Locked Candidate 1 <> 9 r23c1
r3 b2 Locked Candidate 2 <> 9 r12c6
c58\r39 Sashimi X-Wing <> 4 r3c9 -or-
c5b9 turbot fish/ER <> 4 r3c9
-plus-
c5b7 Empty Rectangle <> 4 r3c1 -or-
r7 b2 Empty Rectangle <> 4 r3c1 -or-
r7c5 2-String Kite <> 4 r3c1
r3 b2 Locked Candidate 2 <> 4 r12c6
r1 Naked Pair <> 15 r1c28
c6 Naked Triple <> 125 r37c6
r1 b6 Empty Rectangle <> 1 r5c6 -or-
r1c9 2-String Kite (grouped) <> 1 r5c6
c19 X-Wing <> 4 r2c38 -or-
r19 X-Wing <> 4 r2c8,r4c2
r2 Naked Triple <> 159 r2c19
c25\r69 Sashimi X-Wing <> 1 r6c3 -or-
r9 b4 turbot fish/ER <> 1 r6c5 -or-
c5b4 turbot fish/ER <> 1 r9c2
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Dec 20, 2009 3:33 pm Post subject: |
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Yes, but one test case is not a valid database to make a final decision.
Ted |
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