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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sat Oct 30, 2010 5:28 pm Post subject: Puzzle 10/10/31: A9 Advanced |
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I'm hanging up my hat on posting puzzles. Today's puzzles are the last.
| Code: | +-----------------------+
| 6 4 5 | 7 . . | . . . |
| 2 . . | . 6 . | . . 4 |
| 1 . 9 | . 3 4 | . . . |
|-------+-------+-------|
| 3 . . | 6 2 . | 4 . 8 |
| . 8 2 | 4 5 . | . . 6 |
| . . 4 | . . . | . . . |
|-------+-------+-------|
| . . . | 3 . . | 8 . . |
| . . . | . . . | . 1 . |
| . 1 . | 2 4 . | . . 5 |
+-----------------------+
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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: Mon Nov 01, 2010 10:53 pm Post subject: |
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I turned what was probably intended to be an easier puzzle into a BBDB, albeit an enjoyable one.
X-Wing (6)
Multi-coloring (1); r1c5<>1
Multi-coloring (5); r3c7<>5
XY-Wing (789); r7c5<>9
Transport of above; r4c6<>9
XY-Wing (597); r6c9<>7 |
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lorne
Joined: 22 Nov 2010
Posts: 5
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| Posted: Thu Dec 02, 2010 10:19 pm Post subject: question about multi-coloring |
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Hi there:
I have really struggled with this puzzle in particular. Marty noticed he could eliminate a value of 5 through multi-coloring - but I have not been able to see my way through that. Any help from Marty or anybody else would be appreciated!
thnx,
Lorne |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Dec 03, 2010 1:52 am Post subject: |
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Lorne, if you could post your grid there are a number of people who might give it a shot. In the meantime, I haven't been able to replicate my original solution. Here's the grid after basics as best as I can determine:
| Code: |
+------------+--------------+------------------+
| 6 4 5 | 7 189 2 | 139 389 139 |
| 2 3 8 | 159 6 15 | 1579 579 4 |
| 1 7 9 | 58 3 4 | 56 568 2 |
+------------+--------------+------------------+
| 3 59 1 | 6 2 79 | 4 579 8 |
| 79 8 2 | 4 5 13 | 1379 379 6 |
| 579 6 4 | 189 1789 138 | 13579 2 1379 |
+------------+--------------+------------------+
| 59 2 67 | 3 179 156 | 8 4 79 |
| 4 59 367 | 589 789 568 | 2 1 379 |
| 8 1 37 | 2 4 79 | 3679 3679 5 |
+------------+--------------+------------------+
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Play this puzzle online at the Daily Sudoku site
Here we are after a Skyscraper on 9 in c26.
| Code: |
+------------+-------------+------------------+
| 6 4 5 | 7 189 2 | 139 389 139 |
| 2 3 8 | 19 6 15 | 1579 579 4 |
| 1 7 9 | 58 3 4 | 56 568 2 |
+------------+-------------+------------------+
| 3 59 1 | 6 2 79 | 4 579 8 |
| 79 8 2 | 4 5 13 | 1379 379 6 |
| 579 6 4 | 19 1789 138 | 13579 2 1379 |
+------------+-------------+------------------+
| 59 2 67 | 3 179 156 | 8 4 79 |
| 4 59 367 | 58 78 568 | 2 1 379 |
| 8 1 37 | 2 4 79 | 3679 3679 5 |
+------------+-------------+------------------+
|
Play this puzzle online at the Daily Sudoku site
Multi-coloring on 1 with pincers in r2c4/r5c7; r2c7<>1.
| Code: |
+------------+-------------+------------------+
| 6 4 5 | 7 89 2 | 139 389 139 |
| 2 3 8 | 19 6 15 | 579 579 4 |
| 1 7 9 | 58 3 4 | 56 568 2 |
+------------+-------------+------------------+
| 3 59 1 | 6 2 79 | 4 579 8 |
| 79 8 2 | 4 5 13 | 1379 379 6 |
| 579 6 4 | 19 1789 138 | 13579 2 1379 |
+------------+-------------+------------------+
| 59 2 67 | 3 179 156 | 8 4 79 |
| 4 59 367 | 58 78 568 | 2 1 379 |
| 8 1 37 | 2 4 79 | 3679 3679 5 |
+------------+-------------+------------------+
|
Play this puzzle online at the Daily Sudoku site
XY-Wing on 789, r7c5<>9.
| Code: |
+-----------+------------+--------------+
| 6 4 5 | 7 89 2 | 139 389 13 |
| 2 3 8 | 19 6 15 | 579 579 4 |
| 1 7 9 | 58 3 4 | 56 568 2 |
+-----------+------------+--------------+
| 3 59 1 | 6 2 7 | 4 59 8 |
| 79 8 2 | 4 5 13 | 1379 379 6 |
| 57 6 4 | 19 189 138 | 1357 2 137 |
+-----------+------------+--------------+
| 59 2 67 | 3 17 156 | 8 4 79 |
| 4 59 367 | 58 78 568 | 2 1 379 |
| 8 1 37 | 2 4 9 | 367 367 5 |
+-----------+------------+--------------+
|
Play this puzzle online at the Daily Sudoku site
XY-Wing on 597; r6c9<>7
| Code: |
+---------+----------+------------+
| 6 4 5 | 7 89 2 | 39 38 1 |
| 2 3 8 | 19 6 15 | 579 57 4 |
| 1 7 9 | 58 3 4 | 56 568 2 |
+---------+----------+------------+
| 3 59 1 | 6 2 7 | 4 59 8 |
| 79 8 2 | 4 5 3 | 1 79 6 |
| 57 6 4 | 19 19 8 | 57 2 3 |
+---------+----------+------------+
| 59 2 6 | 3 17 15 | 8 4 79 |
| 4 59 3 | 58 78 6 | 2 1 79 |
| 8 1 7 | 2 4 9 | 36 36 5 |
+---------+----------+------------+
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Play this puzzle online at the Daily Sudoku site
BUG+2; r2c8, r3c7<>5, done!!! |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Dec 03, 2010 4:40 am Post subject: |
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After basics (I have not compared it with Marty's grid): | Code: | +-------------------+-------------------+-------------------+
| 6 4 5 | 7 189 2 | 139 389 139 |
| 2 3 8 | 159 6 15 | 1579 579 4 |
| 1 7 9 | 58 3 4 | 56 568 2 |
+-------------------+-------------------+-------------------+
| 3 59 1 | 6 2 79 | 4 579 8 |
| 79 8 2 | 4 5 13 | 1379 379 6 |
| 579 6 4 | 189 1789 138 | 13579 2 1379 |
+-------------------+-------------------+-------------------+
| 59 2 67 | 3 179 156 | 8 4 79 |
| 4 59 367 | 589 789 568 | 2 1 379 |
| 8 1 37 | 2 4 79 | 3679 3679 5 |
+-------------------+-------------------+-------------------+ |
Taking the simplest steps, I had:
SS 9
SS 1
XY 78-9
XY 5-79
BUG+1 5-7-9
Keith |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Dec 03, 2010 4:43 am Post subject: |
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| A <579> Naked Triple in [c8] reduces Marty's final step to a BUG+1. |
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lorne
Joined: 22 Nov 2010
Posts: 5
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| Posted: Fri Dec 03, 2010 6:24 am Post subject: Thanks |
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Hi Marty and Keith,
Thanks for the tips. Marty, the skyscraper did the trick for me. Some additional chaining but I got it done for there.....
Lorne |
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