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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sat Dec 05, 2009 8:22 am Post subject: Puzzle XY 09/12/05 |
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| Code: | +-----------------------+
| . . 7 | . . 2 | . . . |
| . 8 5 | . 4 7 | . . 2 |
| 3 2 . | . . . | 9 4 . |
|-------+-------+-------|
| . . . | . 7 . | . . . |
| . 5 . | 2 8 4 | . . . |
| 2 7 . | . 5 1 | . . 4 |
|-------+-------+-------|
| . . 8 | . . . | 7 2 . |
| . . 2 | . . . | 4 . 8 |
| . 3 . | . . 8 | . 1 5 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Dec 05, 2009 3:46 pm Post subject: |
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Good puzzle!  Best I could do: | Quote: | w-wing 39
kite 9
w-wing 91 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Dec 05, 2009 4:05 pm Post subject: |
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Well, my first (and probably the only) pass was a BBDBer.
kite 9,
ER 9,
repeat of first kite 9 with a pincer transport,
coloring 9
multi-coloring 9, (Believe me I looked for other deletions but only digit 9 worked)
xyz-wing -369,
w-wing 19,
long AIC found by extending the vertex of a potential xy-wing -469,
coloring 3
Ted  |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Dec 08, 2009 12:25 am Post subject: |
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| As hard as I looked, I couldn't find a W-Wing on 39. I used a Kite (9), two ERs (9,9), XY-Wing (369) with pincer transport and a W-Wing on 19. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Dec 08, 2009 4:25 am Post subject: |
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| Marty R. wrote: | | As hard as I looked, I couldn't find a W-Wing on 39. I used a Kite (9), two ERs (9,9), XY-Wing (369) with pincer transport and a W-Wing on 19. |
after basics, Dan appears to have left out
| Code: | Kite r4c4<>9 ... leading to ... turbot fish r8c6<>9
+--------------------------------------------------------------+
| 469 469 7 | 139 39 2 | 5 8 136 |
| 69 8 5 | 139 4 7 | 13 36 2 |
| 3 2 1 | 8 6 5 | 9 4 7 |
|--------------------+--------------------+--------------------|
| 8 149 3469 | 369 7 39 | 2 5 1369 |
| 19 5 369 | 2 8 4 | 13 7 1369 |
| 2 7 369 | 369 5 1 | 8 369 4 |
|--------------------+--------------------+--------------------|
| 1456 146 8 | 45 139 369 | 7 2 39 |
| 57 16 2 | 57 139 369 | 4 39 8 |
| 479 3 49 | 47 2 8 | 6 1 5 |
+--------------------------------------------------------------+
# 61 eliminations remain
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finally exposing
| Code: | W-Wing: (3=9)r1c5 - r78c5 = r7c6 - (9=3)r7c9 => r1c9,r7c5<>3
+--------------------------------------------------------------+
| 469 469 7 | 139 a39 2 | 5 8 16-3 |
| 69 8 5 | 139 4 7 | 13 36 2 |
| 3 2 1 | 8 6 5 | 9 4 7 |
|--------------------+--------------------+--------------------|
| 8 149 3469 | 36 7 39 | 2 5 1369 |
| 19 5 369 | 2 8 4 | 13 7 1369 |
| 2 7 369 | 369 5 1 | 8 369 4 |
|--------------------+--------------------+--------------------|
| 1456 146 8 | 45 b19-3 c369 | 7 2 d39 |
| 57 16 2 | 57 b139 36 | 4 39 8 |
| 479 3 49 | 47 2 8 | 6 1 5 |
+--------------------------------------------------------------+
# 61 eliminations remain
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Dec 08, 2009 4:31 am Post subject: |
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My solver used:
| Code: | r2c2 2-String Kite <> 9 r4c4
c8b5 turbot fish/ER <> 9 r8c6
<69+3> XYZ-Wing r7c6/r7c9+r8c6 <> 3 r7c5
r7c5 2-String Kite <> 3 r1c9
-1r5c1 9r5c1 9r2c4 1r2c7 [gM-Wing ] <> 1 r5c7 -or-
-9r2c4 1r2c4 1r5c7 9r5c1 [ W-Wing ] <> 9 r2c1
+--------------------------------------------------------------+
| 469 469 7 | 13 39 2 | 5 8 16 |
| 6-9 8 5 | a19 4 7 | b13 36 2 |
| 3 2 1 | 8 6 5 | 9 4 7 |
|--------------------+--------------------+--------------------|
| 8 149 3469 | 36 7 39 | 2 5 139 |
| d19 5 369 | 2 8 4 | c13 7 169 |
| 2 7 369 | 369 5 1 | 8 369 4 |
|--------------------+--------------------+--------------------|
| 1456 146 8 | 45 19 369 | 7 2 39 |
| 57 16 2 | 57 139 36 | 4 39 8 |
| 479 3 49 | 47 2 8 | 6 1 5 |
+--------------------------------------------------------------+
# 53 eliminations remain
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Sorry for using the abbreviated output from my solver, but I have a piece of pie getting cold! |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Dec 08, 2009 9:15 am Post subject: |
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| daj95376 wrote: | | Dan appears to have left out |
I am getting forgetful in my old age. Thanks Danny. |
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oaxen
Joined: 10 Jul 2006
Posts: 96
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| Posted: Tue Dec 08, 2009 5:45 pm Post subject: One stepper |
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A "6" in r1c9 makes it a one stepper. (One of the "6's" in block C)
The same with "4" in r9c3 (One of the "4's" in column 3) |
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