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May 10 DB

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Earl

Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

Posted: Sat May 10, 2008 12:10 pm Post subject: May 10 DB

The May 10 DB succumbs to a UR, a finned x-wing (4), or a kite (4).
Take your pick.

Earl

Code:

+-------+-------+-------+
| . 1 . | . . 6 | 9 . . |
| . . . | . . . | 2 . . |
| 4 . . | 3 9 . | 6 8 . |
+-------+-------+-------+
| 6 . . | 9 . . | . . . |
| . 7 . | . 2 . | . 6 . |
| . . . | . . 5 | . . 1 |
+-------+-------+-------+
| . 5 3 | . 1 8 | . . 2 |
| . . 7 | . . . | . . . |
| . . 2 | 5 . . | . 3 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Sat May 10, 2008 2:58 pm Post subject:

After basics:

Code:

+----------------+----------------+----------------+
| 7 1 8 | 2 45 6 | 9 45 3 |
| 3 9 6 | 78 458 47 | 2 1 45 |
| 4 2 5 | 3 9 1 | 6 8 7 |
+----------------+----------------+----------------+
| 6 38 1 | 9 48 347 | 3457 2 45 |
| 5 7 49 | 1 2 34 | 348 6 89 |
| 2 38 49 | 78 6 5 | 347 479 1 |
+----------------+----------------+----------------+
| 9 5 3 | 6 1 8 | 47 47 2 |
| 18 6 7 | 4 3 2 | 158 59 89 |
| 18 4 2 | 5 7 9 | 18 3 6 |
+----------------+----------------+----------------+

There is a type 1 UR on <18> that solves R8C7 as <5>. Or,

There is a remote pair <45> that solves R4C5 as <8>. Or,

There is an XY-wing <348> that takes out <3> in R4C6. Or,

There is a W-wing <47> that can be extended to take out <7> in R6C8 and R7C7.

The W-wing does not solve the puzzle. The others do.

Keith

Victor

Joined: 29 Sep 2005
Posts: 207
Location: NI

Posted: Sat May 10, 2008 4:40 pm Post subject:

Guess you two have said it all!

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Sat May 10, 2008 7:56 pm Post subject:

ditto on the UR {1,8}

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