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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Jun 30, 2010 3:58 am Post subject: Puzzle 10/06/30: Advanced |
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| Code: | +-----------------------+
| . . . | 5 . 2 | . . . |
| . 3 . | 9 . 4 | 7 1 . |
| . . 4 | . . . | . 8 5 |
|-------+-------+-------|
| 8 5 . | 6 . 1 | . 9 . |
| . . . | . 9 3 | 1 5 . |
| 3 9 . | 7 2 . | 8 6 . |
|-------+-------+-------|
| . 6 . | . 3 8 | 5 . . |
| . 8 3 | 2 5 9 | . 7 . |
| . . 5 | . . . | . . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
| Code: | after basics
+-----------------------------------------------------------------------+
| 1679 17 6789 | 5 1678 2 | 3469 34 369 |
| 5 3 268 | 9 68 4 | 7 1 26 |
| 12679 127 4 | 3 167 67 | 269 8 5 |
|-----------------------+-----------------------+-----------------------|
| 8 5 27 | 6 4 1 | 23 9 237 |
| 2467 247 267 | 8 9 3 | 1 5 27 |
| 3 9 1 | 7 2 5 | 8 6 4 |
|-----------------------+-----------------------+-----------------------|
| 12479 6 279 | 14 3 8 | 5 24 19 |
| 14 8 3 | 2 5 9 | 46 7 16 |
| 1249 124 5 | 14 67 67 | 349 234 8 |
+-----------------------------------------------------------------------+
# 67 eliminations remain
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Jun 30, 2010 5:09 pm Post subject: |
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This was a definite challenge for me but I could have missed a killer move. I finally got it down to three steps......
| Quote: | 1. Type 1 UR 67 r39c56; r3c5<>67
2. ANP(27=9)r47c3 - (9=1)r7c9 - (1=6)r8c9 - (6=2)r2c9; r2c3<>2
3. While chasing an ANP, I found a contradiction
ANP(34=9)r19c7 - (9=1)r7c9 - r8c9 = r8c1 - (1=24)r59c2 - (2=7)r3c2 - (7=6)r3c6 - (6=9)r3c7 - (9)r9c7; r9c7<>9
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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 Jun 30, 2010 6:07 pm Post subject: |
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I didn't find any killer moves but played it as they came (and a lot simpler than Ted!) - the last step saved a couple of moves and there were many extraneous URs (I think!). Four steps...
| Quote: | x-wing(9) r39c17; r1c17<>9, r7c1<>9
kite(2) (2)r2c3=r2c9 - r3c7=r4c7; r4c3<>2
xy-wing(14-6) r8c1; r1c7<>6
xyz-wing(89-6) r1c3; r1c1<>6 |
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