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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Thu Oct 22, 2009 6:27 pm Post subject: Set XY_03 Puzzle 045 |
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| Code: | XY puzzles can be solved using these techniques:
Basics: Naked/Hidden Single, Naked Pair/Triple, Locked Candidates 1/2
Basics+: Naked Quad, Hidden Pair/Triple/Quad
VH: BUG+1, UR Type 1, X-Wing, XY-Wing
VH+: 2-String Kite, Empty Rectangle, Remote Pair, Skyscraper,
XYZ-Wing, finned X-Wing, UR Type 2/4
XY: gM-Wing, W-Wing, XY-Chain, BUG+2, BUG+3, other URs
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| Code: | +-----------------------+
| . . . | . 5 . | . 1 . |
| . 5 9 | . . . | . . . |
| . 8 . | . 2 9 | 5 4 . |
|-------+-------+-------|
| . . . | 9 1 . | . 7 . |
| 8 . 1 | 7 . . | 2 9 . |
| . . 7 | . . . | 4 . . |
|-------+-------+-------|
| . . 8 | . 9 4 | 3 . . |
| 3 . 6 | 2 7 . | . 8 9 |
| . . . | . . . | . 2 . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
[Edit: corrected title -- Thanks Marty!]
Last edited by daj95376 on Fri Oct 23, 2009 12:52 am; edited 1 time in total |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Thu Oct 22, 2009 7:47 pm Post subject: |
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| Code: | *--------------------------------------------------------------------*
| 467 67 2 | 348 5 3678 | 9 1 38 |
| 1467 5 9 | 348 368 13678 | 678 36 2 |
| 167 8 3 | 16 2 9 | 5 4 67 |
|----------------------+----------------------+----------------------|
| 5 236 4 | 9 1 236 | 68 7 38 |
| 8 36 1 | 7 4 36 | 2 9 5 |
| 269 2369 7 | 5 368 2368 | 4 36 1 |
|----------------------+----------------------+----------------------|
| 27 127 8 | 16 9 4 | 3 5 67 |
| 3 4 6 | 2 7 5 | 1 8 9 |
| 79 179 5 | 38 368 1368 | 67 2 4 |
*--------------------------------------------------------------------*
(7)r1c6=(7-1)r2c6=(1)r9c6-(1=6)r7c4-(6=7)r7c9-(7)r3c9=(7)r3c1 => r1c12<>7
singles remain |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Oct 23, 2009 12:15 am Post subject: |
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Danny, how about changing the subject line, this is the second puzzle posted with the same 044 number. 
Marty |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Oct 23, 2009 12:53 am Post subject: |
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Done!!!
A persistent problem of mine! |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Oct 23, 2009 3:00 pm Post subject: |
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Two steps using xy-wing pincer extensions.
xy-wing 36-7 with vertex 36 in r2c8, pincer 67 in r3c9, pincer 37: (3)r2c8 - (3=6)r6c8 - (6)r6c12 = (6)r45c2 - (6=7)r1c2; r3c1<>7,
xy-wing -167 with vertex 67 in r1c2, pincer 16 in r3c1 and pincer17: (7)r1c2 - (7)r1c6 = (7)r2c6 - (7)r2c7 = (7)r3c9 - (7=6)r7c9 - (6=1)r7c4; r3c4<>1 completes the puzzle.
Ted  |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sun Oct 25, 2009 4:30 pm Post subject: |
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| Code: | +----------------+-----------------+-----------------+
| 467 67 2 | 348 5 3678 | 9 1 38 |
| 1467 5 9 | 348 368 13678 | 678 3(6) 2 |
| 16-7 8 3 | 16 2 9 | 5 4 (67) |
+----------------+-----------------+-----------------+
| 5 236 4 | 9 1 236 | 68 7 38 |
| 8 36 1 | 7 4 36 | 2 9 5 |
| (269) 2369 7 | 5 368 2368 | 4 3(6) 1 |
+----------------+-----------------+-----------------+
| (27) 127 8 | 16 9 4 | 3 5 67 |
| 3 4 6 | 2 7 5 | 1 8 9 |
| (79) 179 5 | 38 368 1368 | 67 2 4 |
+----------------+-----------------+-----------------+ |
(279)r679c1 = (6)r6c1 - (6)r6c8 = (6)r2c8 - (6=7)r3c9; r3c1 <> 7 |
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