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kuskey
Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH
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 Posted: Tue Mar 01, 2011 5:34 am Post subject: Mar 1 VH |
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Using the techniques I'm most comfortable with I couldn't find a 1-stepper. However, there is some delayed action with several 2-steppers. After a 356 XY-Wing with pivot at r7c9 setting r56c7<>3, take your choice of either:
1. BUG+1
2. 135 XY-Wing pivot at r3c7 setting r7c1<>5
3. W-Wing on13 in c27 SL in 3 at r9 setting r2c8 and r7c1<>1
4. W-Wing on 35 in c12 SL in 3 at c7 setting r7c1<>5 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Mar 01, 2011 5:49 am Post subject: |
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I missed the XY-Wing, but there were a couple of interesting moves.
| Code: |
+-------------+---------+-----------+
| 58 7 68 | 3 56 1 | 2 9 4 |
| 9 1356 4 | 2 56 7 | 8 13 35 |
| 35 135 2 | 4 9 8 | 135 6 7 |
+-------------+---------+-----------+
| 2 9 5 | 1 3 6 | 7 4 8 |
| 1 8 37 | 79 2 4 | 369 5 36 |
| 6 4 37 | 79 8 5 | 39 2 1 |
+-------------+---------+-----------+
| 57 2 9 | 8 4 3 | 156 17 56 |
| 378 36 68 | 5 1 2 | 4 37 9 |
| 4 35 1 | 6 7 9 | 35 8 2 |
+-------------+---------+-----------+
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Play this puzzle online at the Daily Sudoku site
In the DP 37-79-39 in boxes 456, r5c7 must=6 to kill the DP. After that use a BUG+1 or W-Wing (35).
Or note the overlapping Finned X-Wings on 35 in rows 39; r2c2<>35. That exposes an XY-Wing (163). |
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