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 T_03 Puzzle 81 -- VH

 
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: 3854
PostPosted: Tue Apr 14, 2009 6:50 am    Post subject: Set T_03 Puzzle 81 -- VH Reply with quote
Code:
 +-----------------------+
 | 6 . . | . 1 7 | . . . |
 | . 7 . | . . 3 | 9 . . |
 | . . 1 | . . . | . 2 . |
 |-------+-------+-------|
 | . . . | 7 . . | 6 8 . |
 | 1 . . | . 6 . | . . 7 |
 | 7 6 . | . . 4 | 5 1 9 |
 |-------+-------+-------|
 | . 1 . | 3 . 9 | . . . |
 | . . 5 | 1 . 6 | . . . |
 | . . . | . 2 5 | . . 3 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
 r9  b7  Locked Pair                     <> 89   [r7c13],[r8c12],[r9c38]
 r5  b6  Naked  Pair                     <> 34   [r5c23]
 r7      Naked  Pair                     <> 24   [r7c389]
 r1  b3  Locked Candidate 1              <> 3    [r1c23]
 r1  b3  Locked Candidate 1              <> 8    [r1c23]
   c3b1  Locked Candidate 2              <> 4    [r23c1],[r13c2]

         UR Type 1 [r79c38]              <> 67   [r7c8]

   c34   X-Wing                          <> 9    [r15c2]

         UR Type 1 [r15c78]              <> 34   [r1c7]

         UR Type 1 [r78c17]              <> 24   [r8c1]

         XY-Wing  [r1c3]/[r1c9]+[r3c1]   <> 5    [r1c2],[r3c9]   -or-
         XY-Wing  [r3c1]/[r1c3]+[r3c9]   <> 4    [r1c9]


Last edited by daj95376 on Mon Apr 20, 2009 8:49 am; edited 1 time in total
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Tue Apr 14, 2009 10:01 pm    Post subject: Reply with quote
Quote:
Three UR's and an XY-wing do this one in!


After basics:
Code:
+-------------+-------------+-------------+
| 6   259 49  |2-59 1   7   | 348 345 458 |
| 258 7   48b |2-56 45a 3   | 9   456 1   |
| 359 359 1   |-569 45-9 8  | 7   2   456 |
+-------------+-------------+-------------+
|45-9 45-9 3  | 7  -59e 1   | 6   8   2   |
| 1  -589 89c |5-9d 6   2   | 34  34  7   |
| 7   6   2   | 8   3   4   | 5   1   9   |
+-------------+-------------+-------------+
| 24  1   67  | 3   8   9   | 24  567 56  |
| 234 234 5   | 1   7   6   | 248 9   48  |
| 89  89  67  | 4   2   5   | 1   67  3   |
+-------------+-------------+-------------+
There is an interesting 4 / 5 cell group abcd / e that is not quite a loop, but makes the eliminations shown. Possibly there are other eliminations I did not see.

Keith
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Wed Apr 15, 2009 6:30 am    Post subject: Reply with quote
keith wrote:
Quote:
Three UR's and an XY-wing do this one in!


After basics:
Code:
+-------------+-------------+-------------+
| 6   259 49  |2-59 1   7   | 348 345 458 |
| 258 7   48b |2-56 45a 3   | 9   456 1   |
| 359 359 1   |-569 45-9 8  | 7   2   456 |
+-------------+-------------+-------------+
|45-9 45-9 3  | 7  -59e 1   | 6   8   2   |
| 1  -589 89c |5-9d 6   2   | 34  34  7   |
| 7   6   2   | 8   3   4   | 5   1   9   |
+-------------+-------------+-------------+
| 24  1   67  | 3   8   9   | 24  567 56  |
| 234 234 5   | 1   7   6   | 248 9   48  |
| 89  89  67  | 4   2   5   | 1   67  3   |
+-------------+-------------+-------------+
There is an interesting 4 / 5 cell group abcd / e that is not quite a loop, but makes the eliminations shown. Possibly there are other eliminations I did not see.

Keith

keith, I see what you did.
you went a-b-c-d to eliminate the 5's
then went
e-a-b-c to eliminate the 9's
not quite sure how you made an elimination in r3c5
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Wed Apr 15, 2009 3:37 pm    Post subject: Reply with quote
storm_norm wrote:

keith, I see what you did.
you went a-b-c-d to eliminate the 5's
then went
e-a-b-c to eliminate the 9's
not quite sure how you made an elimination in r3c5


A <9> in R3C5 puts a <4> in a, <8> in b, <9> in c, <5> in d, <9> in e, resulting in two <9>s in C5.

Keith
Back to top
View user's profile Send private message
tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu Apr 16, 2009 11:47 pm    Post subject: Reply with quote
Another lazy, wandering type of solution.
skyscraper 9,
kite 4,
w-wing 49,
coloring 9 twice,
w-wing 25,
w-wing 14

Ted
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