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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Mar 03, 2010 3:57 pm Post subject: Puzzle 10/03/03 (B) |
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Probably difficult as a VH+
| Code: | +-----------------------+
| 5 . . | . . . | . . . |
| . . . | . . 9 | . . 2 |
| . . 1 | . 5 8 | . 3 . |
|-------+-------+-------|
| . . . | 1 6 . | 5 . 3 |
| . . 3 | 8 . 5 | 6 2 . |
| . 1 5 | . 7 . | . . 9 |
|-------+-------+-------|
| . . . | 9 2 . | . . . |
| . . 2 | . 8 . | . . 6 |
| . 9 . | 5 . 3 | . 1 . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Mar 04, 2010 6:13 am Post subject: |
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This was a little easier for me than the A puzzle, taking five steps.
| Quote: | Type 1 UR (48)
XYZ (478)
W-Wing (47)
ER (8)
Flightless XY-Wing (498) with pincer transport |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Mar 05, 2010 1:42 am Post subject: |
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Three steps.
ALS A 3478 in r678c7,
ALS B 78 in r9c9,
shared exclusive = 7,
shared common = 8,
ALSs did not directly provide a deletion, but a transport does;
(8)r9c9 - r9c1 = r2c1; r2c8<>8,
Type 1 UR 48 in r67c78 deletes 48 from r7c7, which sets up an
AIC: (3=1)r2c5 - (1=7)r2c7 - (7=3)r7c7 - r8c7 = r8c1; r2c1<>3.
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Mar 05, 2010 7:06 pm Post subject: |
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| Code: | c19r9 Skyscraper <> 8 r1c23,r2c7
<49+2> XY-Wing r1c3/r1c4+r3c1 <> 2 r1c2,r3c4
r67c78 <48> UR Type 1 <> 48 r7c7
r23c24 <46> UR Type 4 <> 4 r23c2
<47+8> XYZ-Wing r7c3/r7c8+r9c1 <> 8 r7c2
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I don't recall which steps were necessary. |
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Wendy W
Joined: 04 Feb 2008
Posts: 144
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| Posted: Fri Mar 12, 2010 1:13 am Post subject: |
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I'm just now working through the backlog of DAJ puzzles after a (non-Sudoku-related) work crunch.
My solution to this one was a little different: xyz-wing 478 based in r8c3; then a vertical skyscaper on 8, then xy-wing 249. I spotted the UR 48 in boxes 6 and 9 but thought I'd see if I could do without it. Apparently it wasn't required. |
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