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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Sun Aug 07, 2011 5:18 pm Post subject: Puzzle 11/08/07: A XY |
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Code: | +-----------------------+
| 8 . 1 | 4 . 6 | 5 . . |
| . 9 . | . . . | . . 8 |
| 6 . 3 | . . . | . . . |
|-------+-------+-------|
| 9 . . | 7 1 . | 4 8 5 |
| . . . | 6 . 9 | 7 . . |
| 4 . . | . 8 3 | 9 1 . |
|-------+-------+-------|
| 1 . . | 3 6 4 | . . 9 |
| . . . | 2 . 1 | . . . |
| . 6 . | 9 . . | 3 . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Luke451
Joined: 20 Apr 2008 Posts: 310 Location: Southern Northern California
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Posted: Tue Aug 09, 2011 4:19 am Post subject: |
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At least in the spirit of xy:
Code: | *--------------------------------------------------------------------*
| 8 27 1 | 4 239 6 | 5 2379 237 |
| 27 9 45 | 1 23 57 | 26 23467 8 |
| 6 45 3 | 8 29 57 | 1 2479 247 |
|----------------------+----------------------+----------------------|
| 9 3 6 | 7 1 2 | 4 8 5 |
| 5 1 8 | 6 4 9 | 7 23 23 |
| 4 27 27 | 5 8 3 | 9 1 6 |
|----------------------+----------------------+----------------------|
| 1 58 257 | 3 6 4 | 28 257 9 |
| 3 458 9 | 2 57 1 | 68 4567 47 |
| 27 6 2457 | 9 57 8 | 3 2457 1 |
*--------------------------------------------------------------------* |
1. (8)r8c7=r7c7-(8=5)r7c2-(5=4)r3c2-r3c89=(4-6)r2c8=(6)r2c7 =>r8c7<>6
2. w-wing (57)r2c6,r7c3 =>r2c3<>5 (works as xy as well)
Combining 'em:
(6)r2c8=(6-2)r2c7=r7c7-(2)r7c3=w-wing(57)-(5=4)r2c3 =>r2c8<>4, ste |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Tue Aug 09, 2011 4:55 am Post subject: |
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I played an X-Wing on 4, Skyscraper on 2 and Multi-coloring on 7, not knowing to what extent, if any, these contributed to the solution. Overlapping URs, Type 1 on 23 and Type 4 on 29 set r1c8<>23 and r1c5<>2. These exposed an XY-Wing on 239; r1c8, r2c5<>9. |
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