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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Apr 27, 2011 5:58 am Post subject: Puzzle 11/04/26: ~ Difficult+ |
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| Code: | +-----------------------+
| . . . | . 4 . | . . . |
| . 6 7 | 2 5 8 | . 9 4 |
| . 4 8 | . 9 6 | . . . |
|-------+-------+-------|
| . 7 . | 3 . . | . . . |
| 5 2 6 | . . 9 | . 7 . |
| . 3 9 | . 7 5 | . . . |
|-------+-------+-------|
| . . . | . . . | . 6 . |
| . 5 . | . 6 . | 4 . . |
| . 9 . | . . . | . . 2 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
After Basics: This doesn't crack the puzzle, but it's a little productive.
| Code: | UR[(3=9)r7c79] - (9=5)r7c4 - (5=8)r9c4 - (8=1)r9c8 - (1=3)r9c5 => r7c5,r9c7<>3
+--------------------------------------------------------------+
| 9 1 5 | 7 4 3 | 68 2 68 |
| 3 6 7 | 2 5 8 | 1 9 4 |
| 2 4 8 | 1 9 6 | *57 3 *57 |
|--------------------+--------------------+--------------------|
| 148 7 14 | 3 128 12 | 69 5 69 |
| 5 2 6 | 4 18 9 | 38 7 138 |
| 18 3 9 | 6 7 5 | 2 4 18 |
|--------------------+--------------------+--------------------|
| 147 8 1234 | 59 12-3 1247 | *57+39 6 *57+39 |
| 17 5 123 | 89 6 127 | 4 18 379 |
| 6 9 134 | 58 13 147 | 57-3 18 2 |
+--------------------------------------------------------------+
# 53 eliminations remain
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Thu Apr 28, 2011 1:48 am Post subject: |
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I found several steps that had limited impact including the AUR noted by Danny, but then I hit a winner; long but it did the dirty deed...........
anp(17=4)r78c1-als(4=13)r9c35-(1=8)r9c8-(8=5)r9c4-(5=9)r7c4-r7c79=r8c9-(9=6=8=1)r416c9; r6c1<>1
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Thu Apr 28, 2011 3:26 am Post subject: |
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Whew !!! My head hurts just from trying to follow it. _  _ |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Thu Apr 28, 2011 6:57 am Post subject: |
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I went down a long twisty route with this one. Looked like lots of DPs in the grid to me and eventually I found this one-stepper...
| Code: | BUG-Lite(68-69-38-39)r1457c79 ; r5c9<>3
(1)r5c9
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(3)r8c9
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(3)r9c7 - (3=1)r9c5 - (1=8)r5c5 - (8=3)r5c7
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(9)r8c9 - (3)r8c9=(3-2)r8c3=r8c6 - (2=1)r4c6 - (1=8)r5c5 - (8=3)r5c7 |
Then I realised I was being thick! As the second and fourth streams are conjugates this m-wing-like AIC does the same job...
| Code: | | (3=8)r5c6-(8=1)r5c5-(1=2)r4c6 - r8c6=(2-3)r8c3=r8c9 ; r5c9<>3 |
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