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Free Press Aug 20, 2010

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Fri Aug 20, 2010 4:06 pm    Post subject: Free Press Aug 20, 2010 Reply with quote
Code:

Puzzle: FP082010
+-------+-------+-------+
| 2 8 . | . . 5 | . 1 . |
| 1 . 5 | 3 . . | 2 . 7 |
| 9 . . | . . . | . 8 . |
+-------+-------+-------+
| . . . | 4 5 7 | . . . |
| . . . | . . . | . . . |
| . . . | . 9 8 | . . . |
+-------+-------+-------+
| . 6 . | . . . | . . 2 |
| 8 . 2 | . . 3 | 6 . 5 |
| . 9 . | . . . | . 4 8 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Fri Aug 20, 2010 6:02 pm    Post subject: Reply with quote
I got lucky. There is a one-stepper that is available after only solving three cells.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Aug 20, 2010 7:42 pm    Post subject: Reply with quote
I don't know about the three cells, but it was a one-stepper.

Quote:
Coloring on 9
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Fri Aug 20, 2010 8:01 pm    Post subject: Reply with quote
Code:
+-------------------------+-------------------------+-------------------------+
| 2       8       367     | 679     67      5       | 349     1       3469    |
| 1       4#      5       | 3       8#      69      | 2       69      7       |
| 9       37      367     | 1267    1267    1246    | 345     8       346     |
+-------------------------+-------------------------+-------------------------+
| 36      123     13689   | 4       5       7       | 1389    2369    1369    |
| 34567   12357   1346789 | 126     1236    126     | 1345789 235679  13469   |
| 34567   12357   13467   | 126     9       8       | 13457   23567   1346    |
+-------------------------+-------------------------+-------------------------+
| 3457    6       1347    | 15789   17      19      | 1379    379     2       |
| 8       17      2       | 179     4#      3       | 6       79      5       |
| 357     9       137     | 12567   1267    126     | 137     4       8       |
+-------------------------+-------------------------+-------------------------+

Only three cells have been solved. They are marked #.

The skyscraper on 9 in R28 solves R7C6 as 1, and the puzzle.

Keith
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sat Aug 21, 2010 4:13 am    Post subject: Reply with quote
Well, I had more moves and more fun with my four steps.........


AUR (89)r45c37 external implications to prevent the DP: r17c7=9; r45c7<>9 (Not helpful but fun move.)

xy-wing by extending the vertex of potential xy-wing-369: (3=6)r3c9-(6=9)r2c8-r8c8=r8c4-(9=7)r1c4-(7=6)r1c5-(6=3)r1c3; r3c23<>3

AUR (47)r56c17: (3)r6c7=(8)r5c7-(8=3)r4c7; r46c8,r7c7<>3

Flightless xy-wing 12-6 vertex (12)r5c6 with pseudocell (16)r27c6 plus transport (6)r2c6-r2c8=(6)r1c9; r6c9<>6

Ted
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