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Puzzle 10/04/28 (A)

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Wed Apr 28, 2010 2:19 pm Post subject: Puzzle 10/04/28 (A)

Code:

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

Play this puzzle online at the Daily Sudoku site

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Wed Apr 28, 2010 10:15 pm Post subject:

Two steps

Quote:

A short chain found extending the vertex of a potential xy-wing
(1=5)r4c5 - (5=9)r4c8 - r1c8 = r2c9 - (9=1)r2c6; r13c5<>1

xy-wing 1-59 with vertex 19 in r2c6; r1c1<>5 to complete the puzzle.

Ted

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Thu Apr 29, 2010 4:21 am Post subject:

Two XY-Wings, 591 and 195.

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