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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Feb 02, 2010 2:39 pm Post subject: Puzzle 10/02/02 BBDB |
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| Code: | +-----------------------+
| 7 . 4 | 1 . 3 | . . 8 |
| . 3 . | . 7 . | . . . |
| 8 . . | 6 . . | 1 7 . |
|-------+-------+-------|
| 1 . 7 | 4 . . | . 3 . |
| . 4 . | . . . | . 6 7 |
| 5 . . | . . . | . . . |
|-------+-------+-------|
| . . 5 | . . . | 3 9 . |
| . . 8 | 7 9 . | 5 . 4 |
| 4 . . | . 5 . | . 8 . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Feb 03, 2010 3:16 pm Post subject: |
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A fun, non-exhausting BBDBer using typical VH & VH+ techniques for a total of 8 steps. Some were surely not necessary.
| Quote: | x-wing 9,
xy-wing -269 with vertex in r2c1,
xy-wing 1-26 with vertes in r7c9,
three consecutive w-wings on 28 in cells r5c7, r6c2 & r7c4 with strong links on 2 for all three,
finned x-wing 2,
xy-wing 15-8 with vertex in r5c6.
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Ted  |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Feb 04, 2010 12:00 am Post subject: |
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| I used nine moves, including multi-coloring, XYs, X, URs and Finned X-Wing. The last move was an easy BUG+2, with each cell needing the same number, thus they acted as pincers. |
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Wendy W
Joined: 04 Feb 2008
Posts: 144
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| Posted: Fri Feb 05, 2010 1:16 am Post subject: |
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Non-exhausting?! Speak for yourself, Ted! Fun puzzle.
XY 269
XY 126
X 9
XY 269 (again!)
W 29
BUG +1 (259)
Phew, I need a drink! |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Feb 05, 2010 1:17 am Post subject: |
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| Wendy W wrote: | Non-exhausting?! Speak for yourself, Ted! Fun puzzle.
XY 269
XY 126
X 9
XY 269 (again!)
W 29
BUG +1 (259)
Phew, I need a drink! |
Hey, you used fewer steps than either of us.   |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Feb 05, 2010 2:56 am Post subject: |
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When I say BBDB, then my solver used more than four steps.
| Code: | r14 X-Wing <> 9 r69c2,r256c7
c14\r57 finned X-Wing <> 2 r5c6
<69+2> XY-Wing r2c1/r2c9+r7c1 <> 2 r7c9
<16+2> XY-Wing r7c9/r7c1+r8c8 <> 2 r8c2
r25c46 <58> UR Type 4 <> 8 r5c46
<15+8> XY-Wing r5c6/r2c6+r5c5 <> 8 r4c6
r57 X-Wing <> 2 r6c4
BUG+1 = 2 r4c2
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oaxen
Joined: 10 Jul 2006
Posts: 96
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| Posted: Fri Feb 05, 2010 10:10 am Post subject: |
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| 9 in r5c1 makes it a one stepper |
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