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Puzzle 10/03/07 Advanced

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Mon Mar 08, 2010 3:11 am Post subject: Puzzle 10/03/07 Advanced

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Code:

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

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storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Mon Mar 08, 2010 4:04 am Post subject:

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after SSTS,

Code:

+----------------+---------------+--------------+
| 2 57 (69) | 59 8 67 | 3 4 1 |
| 57 1 68(9) | 4 26 3 | 28 6(9) 57 |
| 3 8-6 4 | 259 2567 1 | 28 (69) 57 |
+----------------+---------------+--------------+
| 6 9 2 | 7 4 5 | 1 3 8 |
| 1 38 38 | 6 9 2 | 7 5 4 |
| 57 4 57 | 3 1 8 | 6 2 9 |
+----------------+---------------+--------------+
| 4 257 56 | 1 2567 67 | 9 8 3 |
| 8 257 357 | 25 2357 9 | 4 1 6 |
| 9 36 1 | 8 36 4 | 5 7 2 |
+----------------+---------------+--------------+

Quote:

w-wing 69

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tlanglet

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

Posted: Tue Mar 09, 2010 3:44 pm Post subject:

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Norm, I had a different code set after basics. What is this "SSTS" thing?

Code:

*-----------------------------------------------------------*
| 2 567 5679 | 59 8 67 | 3 4 1 |
| 57 1 689 | 4 26 3 | 28 69 57 |
| 3 5678 4 | 259 2567 1 | 28 69 57 |
|-------------------+-------------------+-------------------|
| 6 9 2 | 7 4 5 | 1 3 8 |
| 1 38 38 | 6 9 2 | 7 5 4 |
| 57 4 57 | 3 1 8 | 6 2 9 |
|-------------------+-------------------+-------------------|
| 4 2567 567 | 1 2567 67 | 9 8 3 |
| 8 2357 357 | 25 2357 9 | 4 1 6 |
| 9 36 1 | 8 36 4 | 5 7 2 |
*-----------------------------------------------------------*

Starting with my code, I needed two steps.

AIC found extending the vertex of a potential xy-wing -347:
(3=6)r9c5 - r7c6 = r1c6 - (6=2)r2c5 - (2=8)r2c7 - r3c7 = r3c2 - (8=3)r5c2; r9c2<>3

The finishing step was a simple BUG+! that set r7c5=7.

Ted

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storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Tue Mar 09, 2010 6:35 pm Post subject:

Ted, "SSTS" is the Simple Sudoku Technique Set simple sudoku recognizes basics x-wings xy-wings swordfish coloring multi-coloring in my haste I simply posted the grid after these techniques were filtered out.

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tlanglet

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

Posted: Tue Mar 09, 2010 8:15 pm Post subject:

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storm_norm wrote:

Ted,

"SSTS" is the Simple Sudoku Technique Set
simple sudoku recognizes
basics
x-wings
xy-wings
swordfish
coloring
multi-coloring

in my haste I simply posted the grid after these techniques were filtered out.

Thanks for the info Norm.

I think I will review my solution if I had started with the SSTS code.

Ted

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Marty R.

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

Posted: Tue Mar 09, 2010 11:25 pm Post subject:

I used an XYZ-Wing (567), Kite (6), Coloring (7) and M-Wing (69).

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