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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Mar 29, 2011 2:21 pm Post subject: Puzzle 11/03/29: ~ Difficult |
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| Code: | +-----------------------+
| 2 . . | 6 3 . | 4 . 9 |
| . 9 . | 8 . . | . . . |
| . . . | . 9 . | . . 8 |
|-------+-------+-------|
| 3 6 . | 2 . . | . . 1 |
| 9 . 1 | . 4 . | 3 . . |
| . . . | . . 3 | 7 . . |
|-------+-------+-------|
| 7 . . | . 1 4 | . . . |
| . . . | . . . | . 2 . |
| 8 . 6 | 3 . . | . . 7 |
+-----------------------+
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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: Wed Mar 30, 2011 2:41 am Post subject: |
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A fun two stlepper...............
| Quote: | anp(45=8)r4c3|r6c1-r6c23=(8-6)r6c5=(6-4)r6c9=r8c9-(4=1)r9c8-(1=5)r8c7-(5=8)r4c7; conflict r4c3<>8
xy-wing (34-5) vertex (34)r8c9 with als pincer (1345)b7q458: (5=4)r6c9-(4=3)r8c9-als(3=5)b7q584; r6c1<>5
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Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Wed Mar 30, 2011 5:27 am Post subject: |
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A one-step chain..
| Quote: | | (4)r4c8=r9c8 - (4=1)r9c2 - anp(1=54)r86c1 - (4)r2c1=r2c3 ; r4c3<>4 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Mar 31, 2011 4:27 pm Post subject: |
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| I could find nothing so I used a Medusa wrap. Then multi-coloring on 4 and a flightless XY-Wing on 145 finished it up. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Thu Mar 31, 2011 5:41 pm Post subject: |
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| Marty R. wrote: | | I could find nothing ... |
| Code: | after basics
+-----------------------------------------------------------------------+
| 2 158 578 | 6 3 157 | 4 157 9 |
| 1456 9 3457 | 8 25 1257 | 1256 13567 356 |
| 156 135 357 | 4 9 1257 | 1256 13567 8 |
|-----------------------+-----------------------+-----------------------|
| 3 6 458 | 2 7 9 | 58 458 1 |
| 9 7 1 | 5 4 68 | 3 68 2 |
| 45 2458 2458 | 1 68 3 | 7 9 456 |
|-----------------------+-----------------------+-----------------------|
| 7 235 235 | 9 1 4 | 568 3568 356 |
| 145 1345 9 | 7 68 68 | 15 2 345 |
| 8 14 6 | 3 25 25 | 9 14 7 |
+-----------------------------------------------------------------------+
# 85 eliminations remain
r29c56 <25> UR Type 1.2224 <> 25 r2c6 extraneous
r9c9 2-String Kite <> 4 r6c2
XY-Wing: (5=1)r8c1 - (1=4)r9c2 - (4=3)r8c2
+Extensions: (4=5)r6c1 - - (3=4)r8c9 => r6c9<>4
+-----------------------------------------------------------------------+
| 2 158 578 | 6 3 157 | 4 157 9 |
| 1456 9 3457 | 8 25 17 | 1256 13567 356 |
| 156 135 357 | 4 9 1257 | 1256 13567 8 |
|-----------------------+-----------------------+-----------------------|
| 3 6 458 | 2 7 9 | 58 458 1 |
| 9 7 1 | 5 4 68 | 3 68 2 |
| 45 258 2458 | 1 68 3 | 7 9 56-4 |
|-----------------------+-----------------------+-----------------------|
| 7 235 235 | 9 1 4 | 568 3568 356 |
| 15 34 9 | 7 68 68 | 15 2 34 |
| 8 14 6 | 3 25 25 | 9 14 7 |
+-----------------------------------------------------------------------+
# 78 eliminations remain
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Mar 31, 2011 7:19 pm Post subject: |
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| Thanks Danny. I never played the UR because it didn't look productive. I either had a different grid or just plain missed the coloring on 4. After the Medusa wrap I found coloring to force r8c1<>4, then that XY-Wing you show pivoted in r8c1 was what I used to finish. |
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