| View previous topic :: View next topic |
| Author |
Message |
daj95376
Joined: 23 Aug 2008
Posts: 3854
|
 Posted: Thu Jul 30, 2009 3:41 pm Post subject: Set XY_03 Puzzle 030 |
 |
|
| Code: | +-----------------------+
| 3 . . | 7 . . | . . 6 |
| . 8 4 | . . 6 | 5 . . |
| . 5 . | 8 . . | 3 . 1 |
|-------+-------+-------|
| 2 . 9 | . . . | 6 . . |
| . . . | . 7 . | . . . |
| . 1 . | . . 9 | . 3 . |
|-------+-------+-------|
| . 3 6 | 4 . . | 7 . . |
| . . . | . . 7 | . 1 . |
| 7 . 8 | . . . | . . . |
+-----------------------+
|
Play this puzzle online at the Daily Sudoku site |
|
| Back to top |
|
 |
storm_norm
Joined: 18 Oct 2007
Posts: 1741
|
| Posted: Thu Jul 30, 2009 7:00 pm Post subject: |
|
|
DP #1 {solves it.}
| Code: | .------------------.------------------.------------------.
| 3 2 1 | 7 45 45 | 9 8 6 |
| 9 8 4 |*13 *13 6 | 5 7 2 |
| 6 5 7 | 8 9 2 | 3 4 1 |
:------------------+------------------+------------------:
| 2 7 9 |*13 48 *13 | 6 5 48 |
| 48 6 3 | 25 7 458 | 1 29 489 |
| 48 1 5 | 26 2468 9 | 248 3 7 |
:------------------+------------------+------------------:
| 1 3 6 | 4 258 58 | 7 29 589 |
| 5 49 2 | 69 368 7 | 48 1 348 |
| 7 49 8 | 259 *1235 *13 | 24 6 345 |
'------------------'------------------'------------------' |
the BUGlite marked {1,3} r249c456, in order to avoid the DP you can eliminate 13 from r9c5.
or you can think of the 3 in r8c5 and r9c9 as having to be there to avoid the DP, neither can both be false. and that eliminates the 3 in r8c9.
either solve the puzzle.
------
DP #2 {doesn't solve it.}
| Code: | .------------------.------------------.------------------.
| 3 2 1 | 7 45 45 | 9 8 6 |
| 9 8 4 | 13 13 6 | 5 7 2 |
| 6 5 7 | 8 9 2 | 3 4 1 |
:------------------+------------------+------------------:
| 2 7 9 | 13 *48 13 | 6 5 *48 |
|*48 6 3 | 25 7 458 | 1 29 *489 |
|*48 1 5 | 26 *2468 9 | 248 3 7 |
:------------------+------------------+------------------:
| 1 3 6 | 4 258 58 | 7 29 589 |
| 5 49 2 | 69 368 7 | 48 1 348 |
| 7 49 8 | 259 1235 13 | 24 6 345 |
'------------------'------------------'------------------' |
the 48 BUGlite, r456c159... in order to avoid the DP, either the (26) pair r6c45 is true or if not then the 9 in r9c9 has to be true.
BUG48[(26)r6c45 = (9)r5c9] - (9=2)r5c8; r6c7 <> 2
leads to a BUG+2 grid (interestingly still contains the DP #1 mentioned above) with a easy to see w-wing {4,8} eliminates 8 from r8c5. |
|
| Back to top |
|
|
arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
|
| Posted: Fri Jul 31, 2009 12:03 am Post subject: |
|
|
I used three steps | Quote: | Skyscraper 2
kite 8
w-wing 59 with 24 extension to link 9's |
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
