dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Set H Puzzle 33

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj
View previous topic :: View next topic  
Author Message
daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sun Dec 28, 2008 6:50 pm    Post subject: Set H Puzzle 33 Reply with quote

You might want to be sure that you have lots of time before starting this puzzle!

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

Play this puzzle online at the Daily Sudoku site
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sun Dec 28, 2008 11:25 pm    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 238    348    12378 | 9      13     34    | 2347   5      6     |
| 2356   3456   12367 | 1345   8      3456  | 9      127    1347  |
| 3569   34569  136   | 7      2      3456  | 34     8      134   |
:---------------------+---------------------+---------------------:
| 4      1      9     | 2      35     7     | 35     6      8     |
| 236    7      5     | 36     4      8     | 1      29     39    |
| 2368   368    2368  | 356    9      1     | 2357   4      357   |
:---------------------+---------------------+---------------------:
| 3569   2      36    | 1345   7      3459  | 8      19     1459  |
| 7      59     4     | 8      156    2     | 56     3      159   |
| 1      3589   38    | 345    356    3459  | 4567   79     2     |
'---------------------'---------------------'---------------------'

using the strong links on 1 in col 4, we can see that either the 3 in r1c5 is true or the 9 in r7c8 is true, a little extension from the 3 we get this chain.
(9=3)r5c9 - (3)r4c7 = (3)r4c5 - (3=1)r1c5 - (1)r2c4 = (1)r7c4 - (1=9)r7c8; r78c9 <> 9

but for some reason I can't make this post any longer... Rolling Eyes

so on to the next post.
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sun Dec 28, 2008 11:29 pm    Post subject: Reply with quote

then after some basics...

Code:
.------------------.------------------.------------------.
| 38    348   7    | 9     1     34   | 2     5     6    |
| 2356  3456  236  | 345   8     3456 | 9     1     7    |
| 9     56    1    | 7     2     56   | 34    8     34   |
:------------------+------------------+------------------:
| 4     1     9    | 2     35    7    | 35    6     8    |
| 36    7     5    | 36    4     8    | 1     2     9    |
| 2368  368   2368 | 356   9     1    | 7     4     35   |
:------------------+------------------+------------------:
| 356   2     36   | 1     7    -345  | 8     9    *45   |
| 7     9     4    | 8     56    2    | 56    3     1    |
| 1     358   38   | 345 [3]56   359  |[4]56  7     2    |
'------------------'------------------'------------------'

the UR {5,6} says that either the 3 in r9c5 is true, or the 4 in r9c7 is true...

in either case, the 3 in r7c6 cannot exist.

56UR[(3)r9c5 = (4)r9c7] - (4)r7c9 = (4)r7c6; r7c6 <> 3

or...

if r9c5 is 3 then r7c6 is not 3...

if r9c5 is not 3 then r9c7 is 4,
r7c9 <4> r7c6 is 4.
means 3 is not in r7c6.

single from there.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5161
Location: Rochester, NY, USA

PostPosted: Sun Dec 28, 2008 11:58 pm    Post subject: Reply with quote

This did take me a long time, as you predicted.

A half-dozen ERs opened things up. Then a Type 1 UR on 56. Finally, an XY-Wing on 453 with pincer transports, using one transport of each pincer.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj All times are GMT
Page 1 of 1

 
Jump to:  
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