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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Mon Jan 27, 2014 6:39 pm Post subject: Daily Telegraph January 24, 2014 Diabolical |
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Interesting | Code: |
+-------+-------+-------+
| 2 . . | 4 7 . | . . . |
| . . 1 | . . . | 3 . 8 |
| 9 . . | . . 8 | . . . |
+-------+-------+-------+
| . . 2 | . . . | 5 8 . |
| . . . | 6 . 3 | . . . |
| . 4 . | . . . | 9 . . |
+-------+-------+-------+
| . . . | 5 . . | . . 7 |
| 3 . 7 | . . . | 6 . . |
| . 9 . | . 4 7 | . . 3 |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Jan 28, 2014 2:49 am Post subject: |
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Interesting indeed. So interesting that I can't seem to make enough of a dent in it to do anything.
I played a W-Wing on 12 and a Type 1 UR on 29, and that's where things stand. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Jan 28, 2014 5:57 am Post subject: |
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Finally got it with a five-stepper.
1) W-Wing on 12
2) Type 1 UR on 29
3) Coloring on 5
4) XYZ-Wing on 148
5) XY-Wing on 16-5 |
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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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| Posted: Tue Jan 28, 2014 9:18 am Post subject: Daily Telegraph January 24, 2014 Diabolical |
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| Code: |
+--------------+--------------+------------+
| 2 8 3 | 4 7 5 | 1 6 9 |
| d45 7 1 | 29 6 29 | 3 c45 8 |
| 9 6 e45 | 3 1 8 | 47 27 245 |
+--------------+--------------+------------+
| 167 3 2 | 17 9 4 | 5 8 16 |
| 158 15 9 | 6 258 3 | 47 27 124 |
| 15678 4 568 | 1278 258 12 | 9 3 126 |
+--------------+--------------+------------+
| 148 12 f48 | 5 3 6 | g28 9 7 |
| 3 25 7 | 1289 28 129 | 6 145 145 |
| 568 9 568 | a12 4 7 | h8-2 b15 3 |
+--------------+--------------+------------+
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Interesting in that there are two XY Chains
The one which makes many eliminations does not solve it.
XY Chain: (1=2)r6c6-(2=9)r2c6-(9=2)r2c4-(2-1)r9c4; r46c4<>1, r8c6<>1 does not solve it.
XY Chain: (2=1)r9c4-(1=5)r9c8-(5=4)r2c8-(4=5)r2c1-(5=4)r3c3-(4=8)r7c3-(8=2)r7c7; r9c7<>2; stte. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Jan 28, 2014 10:57 am Post subject: |
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I looked all over te place for chains with no success.
Note: the first chain is basically the W-Wing on 12 with SL 2 in c5. |
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