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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Feb 26, 2010 2:06 am Post subject: Puzzle 10/02/25 (B) |
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| Code: | +-----------------------+
| 4 . . | . 9 7 | . . . |
| . . . | . . 5 | 3 . 4 |
| . . . | 3 4 . | . . . |
|-------+-------+-------|
| . . 2 | 9 . . | . 7 . |
| 5 . 7 | . 2 6 | . . . |
| 3 6 . | . 7 1 | . . . |
|-------+-------+-------|
| . 2 . | . . . | . . 3 |
| . . . | 7 . . | . . 6 |
| . 3 . | . . . | 1 2 5 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Feb 26, 2010 3:51 am Post subject: |
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looked at this for a while.
I can solve it in two.
UR 49
then a almost locked triple {4,5,8} in r6c478 leads to r6c3 <> 8 |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Feb 26, 2010 7:25 am Post subject: |
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Not knowing about locked triples I had to use three steps:
ur 48
xyz-wing 258
remote pair 89 |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Feb 26, 2010 1:39 pm Post subject: |
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| arkietech wrote: | | Not knowing about locked triples |
here is that almost locked triple that I was so vague about.
its in row 6, {4,5,8} in c478 if the 2 is false in r6c7
if the 2 is true.
(2)r6c7 - (2)r3c7 = (2-6)r3c1 = (6)r7c1 - (6=8)r7c3
in either case the 8 in r6c3 is eliminated.
| Code: | +---------------------+-------------+--------------------+
| 4 158 3 | 12 9 7 | 258 6 28 |
| 1289 7 189 | 12 6 5 | 3 189 4 |
| 19(26) 159 1569 | 3 4 8 | 59(2) 159 7 |
+---------------------+-------------+--------------------+
| 18 4 2 | 9 5 3 | 6 7 18 |
| 5 19 7 | 48 2 6 | 48 3 19 |
| 3 6 9-8 | (48) 7 1 | (2458) (458) 289 |
+---------------------+-------------+--------------------+
| 89(6) 2 (68) | 5 1 49 | 7 489 3 |
| 189 1589 14589 | 7 3 2 | 489 489 6 |
| 7 3 49 | 6 8 49 | 1 2 5 |
+---------------------+-------------+--------------------+ |
als[(8)r6c478 = (2)r6c7] - (2)r3c7 = (2-6)r3c1 = (6)r7c1 - (6=8)r7c3; r6c3 <> 8 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Feb 26, 2010 8:26 pm Post subject: |
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I started with a ALS128 in r14c9.
ALS[(1)r1c4 = (8)r1c9]r1c49 - (8=1)r4c9 - r4c1 = r5c2; r1c2<>1.
Coloring on 8 or Type 1 UR14 (and probably other moves) completes the puzzle.
Ted
Edit: While having lunch I was thinking about this puzzle and realized that the ALS I used was simply a xy-wing, but since I was specifically looking for ALSs that is what I found and posted! |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Feb 27, 2010 1:57 am Post subject: |
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| Flightless XY-Wing (281) with pincer transport and Type 1 UR (49). |
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