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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Feb 21, 2010 1:08 am Post subject: Puzzle 10/02/20 ___ BBDB as VH+ puzzle |
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| Code: | +-----------------------+
| 5 . . | 8 2 1 | . . . |
| . 3 . | 6 5 . | . . . |
| . . 8 | 3 . 4 | . . 1 |
|-------+-------+-------|
| 3 1 9 | 5 8 . | 2 . 4 |
| 6 4 . | 2 . . | . . . |
| 2 . 5 | . . . | 1 . . |
|-------+-------+-------|
| . . . | 4 . 2 | . 3 . |
| . . . | . . . | 4 . . |
| . . 3 | 1 . . | . . 6 |
+-----------------------+
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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: Sun Feb 21, 2010 4:59 pm Post subject: |
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A VH+(?) one-stepper
| Quote: | UR67 in r46c68. To prevent the deadly pattern, r6c6=3 or r6c68=9.
(3)r6c6 - (3=9)r5c6 - (9=7)r6c4,
(9)r6c68 - (9=7)r6c4
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Ted  |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Feb 21, 2010 7:03 pm Post subject: |
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OK, so I tried again and found a two stepper that I think is a VH+.
| Quote: | Type 4 UR67 r46c68 with x-wing on 6 overlay deletes 7 in r6c68, which opens up a
xy-wing 6-79 with vertex in r6c8 that deletes 7 in r4c6 & r6c9 to complete the puzzle.
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Ted  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun Feb 21, 2010 7:06 pm Post subject: |
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| tlanglet wrote: | A VH+(?) one-stepper
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Aaack! My messages overlapped yours. I deleted mine.
Nice find! I missed the fact that several steps from my solver could be skipped. I have to stop posting puzzles when I'm tired!!!
Regards, Danny |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun Feb 21, 2010 7:40 pm Post subject: |
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Will you accept this puzzle as a replacement?
| Code: | +-----------------------+
| 8 . . | 7 1 . | . . 4 |
| . 7 . | . . 6 | . . . |
| . . . | 8 . . | 7 . . |
|-------+-------+-------|
| 3 . 8 | 9 . 1 | . . 7 |
| 7 . . | . 2 . | 8 . 1 |
| . 1 . | 5 . . | . 4 . |
|-------+-------+-------|
| . . 6 | . 7 . | 3 . . |
| . . . | . . 5 | . 7 . |
| 2 . . | 1 6 . | . . 8 |
+-----------------------+
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Feb 21, 2010 11:06 pm Post subject: |
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Danny, I welcome all puzzles you post. I enjoyed the original puzzle you posted and also the alternate.
I completed the alternate in five moves.
| Quote: | Flightless w-wing 29 in r1c6 & r7c9 with grouped strong link on 9 in r1689c7 plus two transports,
xy-wing 24-9 with vertex in r7c4
Type 3 UR59 in r23c59 provides a pseudocell 26 in r23c9 which combines with the 36 in r1c8 and the 236 in r3c8 to form a subset (236) thereby deleting the 6 in r1c7 (which is probably not useful),
flightless xy-wing 26-9 with vertex in r8c7 and pseudocell 69 in r6c37 plus transport: (9)r7c9 - r7c2 = r3c2; r23c3<>9,
another flightless xy-wing 2-69 with vertex in r7c9 and pseudocell 69 in r157c3 plus transport: (6)r1c2 - r4c2 = r6c1; r6c7<>6.
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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: Mon Feb 22, 2010 5:18 am Post subject: |
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| On the original, I used a Kite (2), XYZ (679) and Type 1 UR (67). |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Feb 22, 2010 6:13 am Post subject: |
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| I tried on the alternate to double Ted's number of moves, but fell one short at nine, ending with a flightless XY-Wing on 492 with pincer transport. |
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