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Puzzle NR_009

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Tue May 05, 2009 9:23 am Post subject: Puzzle NR_009

Code:

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

Play this puzzle online at the Daily Sudoku site

tlanglet

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

Posted: Tue May 05, 2009 2:32 pm Post subject:

Another enjoyable puzzle.

Quote:

A x-wing 6 to open up <78> in r4c5,
finned x-wing 8 to open up <17> in r4c6,
w-wing 89 to open up <68> in r5c4,
xy-wing 678 with pseudo-cell 67 in row4 to complete the puzzle.

Ted

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Tue May 05, 2009 11:34 pm Post subject:

Code:

.---------------.---------------.---------------.
| 1 8 79 | 4 3 2 | 79 5 6 |
| 6 4 79 | 1 5 B789 | 2 3 BA78 |
| 3 5 2 |A89 789 6 |A789 1 4 |
:---------------+---------------+---------------:
| 4 9 16 | 5 678 178 | 678 2 3 |
| 7 3 16 |68-9 2 18-9 | 5 4 BA89 |
| 8 2 5 | 3 679 4 | 1 67 79 |
:---------------+---------------+---------------:
| 2 6 8 | 79 1 3 | 4 79 5 |
| 9 1 3 | 678 4 5 | 67 678 2 |
| 5 7 4 | 2 689 B89 | 3 689 1 |
'---------------'---------------'---------------'

the two w-wings marked A and B
simultaneously remove 9 from r5c4 and r5c6 and solve the puzzle.

A... (9=8)r3c4 - (8)r3c7 = (8)r2c9 - (8=9)r5c9

B... (9=8)r9c6 - (8)r2c6 = (8)r2c9 - (8=9)r5c9

Marty R.

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

Posted: Sun May 10, 2009 12:22 am Post subject:

I used a W-Wing on 89, then made another elimination with a pincer transport. An ER on 6 opened things up enough for a W-Wing on 68 to finish it off.

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