dailysudoku.com :: View topic - Swordfish, I like them.

dailysudoku.com
Discussion of Daily Sudoku puzzles

FAQ

Memberlist

Usergroups

Profile

Swordfish, I like them.

dailysudoku.com Forum Index -> Other puzzles

View previous topic :: View next topic

Author

Message

wapati

Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

Posted: Thu Apr 23, 2009 5:07 am Post subject: Swordfish, I like them.

Code:

4 . 1|8 . .|. . .
8 5 6|. 9 .|. . .
. 9 .|. . .|. 5 .
-----+-----+-----
6 3 2|4 . .|. . .
. . .|. . .|. . .
. . .|. . 6|5 7 4
-----+-----+-----
. 8 .|. . .|. 3 .
. . .|. 7 .|4 8 2
. . .|. . 1|6 . 7

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Fri Apr 24, 2009 5:37 am Post subject:

Code:

.------------------.------------------.------------------.
| 4 27 1 | 8 236 5 | 2379 26 369 |
| 8 5 6 | 17 9 23 | 237 4 13 |
| 237 9 37 | 17 246 24 | 278 5 168 |
:------------------+------------------+------------------:
| 6 3 2 | 4 5 7 | 89 1 89 |
| 57 47 457 | 9 1 8 | 23 26 36 |
| 9 1 8 | 23 23 6 | 5 7 4 |
:------------------+------------------+------------------:
| 27 8 79 | 6 24 249 | 1 3 5 |
| 1 6 359 | 35 7 39 | 4 8 2 |
| 235 24 345 | 235 8 1 | 6 9 7 |
'------------------'------------------'------------------'

xy-wing {2,4,7} removes 7 from r5c1
(2=7)r1c2 - (7)r5c2 = (7)r5c3 - (7=9)r7c3 - (9)r7c6 = (9-3)r8c6 = (3-2)r2c6 = (2)r2c7; r1c78 <> 2
a swordfish is present at this point, but
this xy-chain will do.
(3=2)r2c6 - (2=7)r1c7 - (7=9)r1c7 - (9=3)r1c9; r1c5 <> 3

wapati

Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

Posted: Thu Apr 30, 2009 2:05 pm Post subject: Double trouble.

I can make this a 3 step puzzle, if two of those are swords.

Code:

. . 9|1 . .|5 . .
. 5 .|. 9 3|6 . .
3 . 6|2 . .|. . .
-----+-----+-----
. . .|. . 8|4 7 .
. 6 .|4 . 2|. 5 .
. 4 7|6 . .|. . .
-----+-----+-----
. . .|. . 4|9 . 1
. . 4|9 3 .|. 8 .
. . 2|. . 1|3 . .

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Thu Apr 30, 2009 7:22 pm Post subject:

Code:

*--------------------------------------------------------------------*
| 247 278 9 | 1 468 *67 | 5 23 23478 |
| 1247 5 *18 |*78 9 3 | 6 12 2478 |
| 3 78-1 6 | 2 48 5 | 178 9 478 |
|----------------------+----------------------+----------------------|
| 29 29 15 | 3 15 8 | 4 7 6 |
| 18 6 3 | 4 7 2 | 18 5 9 |
| 158 4 7 | 6 15 9 | 128 123 238 |
|----------------------+----------------------+----------------------|
| 57 3 58 | 578 2 4 | 9 6 1 |
| 1567 *17 4 | 9 3 *67 | 27 8 257 |
| 5679 789 2 | 578 68 1 | 3 4 57 |
*--------------------------------------------------------------------*

xy-chain or an ?wing with extensions solves in in one step.

Display posts from previous:

	dailysudoku.com Forum Index -> Other puzzles	All times are GMT
Page 1 of 1

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