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Puzzle NR 09/11/16 (B)

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Mon Nov 16, 2009 9:27 am Post subject: Puzzle NR 09/11/16 (B)

Code:

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

Play this puzzle online at the Daily Sudoku site

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Mon Nov 16, 2009 2:48 pm Post subject:

Code:

*-----------------------------------------------------------------------------*
| 7 b19 5 | 6 8 139 | 2 a39 4 |
| 469 3 c16 | 59 1459 2 | 7 d69 8 |
| 469 2 8 | 7 349 349 | 1 5 *36 |
|-------------------------+-------------------------+-------------------------|
| 2 167 9 | 4 137 1367 | 5 8 367 |
| 356 8 1367 | 2359 123579 13679 | 4 *36 2367 |
| 356 4 367 | 235 2357 8 | 9 1 2367 |
|-------------------------+-------------------------+-------------------------|
| 8 5 47 | 1 6 47 | 3 2 9 |
| 39 79 2 | 8 379 5 | 6 4 1 |
| 1 69 346 | 239 2349 349 | 8 7 5 |
*-----------------------------------------------------------------------------*
(6=3)r3c9-(3=9)r1c8-(9=1)r1c2-(1=6)r2c3-(6)r2c8=(6)r5c8 => r2c8,r456c9<>6;
later I needed a skyscraper on 1 then singles.

tlanglet

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

Posted: Mon Nov 16, 2009 2:53 pm Post subject:

I used two steps.

Quote:

xy-wing 16-9 with vertex in r2c3,
skyscraper or coloring on 1

Ted

Marty R.

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

Posted: Tue Nov 17, 2009 12:02 am Post subject:

M-Wing (36), XY-Wing (169), two ERs (1,1).

oaxen

Joined: 10 Jul 2006
Posts: 96

Posted: Tue Nov 17, 2009 10:19 am Post subject:

tlanglet wrote:

I used two steps.

Quote:

xy-wing 16-9 with vertex in r2c3,
skyscraper or coloring on 1

Ted

"1" in r1c6 makes it a one stepper. But there are more "pairs", e.g. "3" on r8c5 which also gives the solution.

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