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 

Puzzle 10/07/31: C

 
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: Sat Jul 31, 2010 4:51 am    Post subject: Puzzle 10/07/31: C Reply with quote
Code:
 +-----------------------+
 | 6 . . | . . . | . . . |
 | . . 1 | . . . | . . . |
 | 3 2 . | 8 . . | 7 . . |
 |-------+-------+-------|
 | 8 . 6 | . 4 . | . . 2 |
 | . . . | 6 . . | . . . |
 | . . . | . 1 5 | . 3 6 |
 |-------+-------+-------|
 | 5 . 3 | . . 1 | . 6 4 |
 | . . . | . . 3 | 2 8 . |
 | . . . | 5 . 4 | 1 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Rating wrote:
BBDB turbot
Back to top
View user's profile Send private message
peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sat Jul 31, 2010 3:30 pm    Post subject: Reply with quote
Decided to play to the rating... Ouch!

Quote:
finned x-wing(9) r39c35 ; r8c3<>9
xy-wing(49-7) r3c3 ; r1c3<>7, r8c1<>7
kite(7) ; r2c6<>7
xy-wing(29-5) r2c6 ; r3c8<>5
xy-wing(47-8) r8c3 ; r12c2<>8, r9c3<>8
BUG+1 ; r8c2=7
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Jul 31, 2010 5:11 pm    Post subject: Reply with quote
peterj wrote:
Decided to play to the rating... Ouch!

One gold star for Peter!!!
Back to top
View user's profile Send private message
tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sun Aug 01, 2010 8:24 pm    Post subject: Reply with quote
I had a peek at the ratings after reading Peter's "Ouch" comment. My solution was essentially the same as Peter's

Quote:
ER9 with hinge box8 SL r3c35; r8c3<>9, which sets up a
xy-wing 4-79 vertex (49)r3c3; r1c3,r8c1<>7
ER7 with hinge box2 SL r4c26; r1c2<>7 which sets up a
xy-wing 2-59 vertex (29)r2c6; r3c8<>5
xy-wing 47-8 vertex (47)r8c3; r12c2,r9c3<>8
BUG+1 forces r8c2=7

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



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sun Aug 01, 2010 8:25 pm    Post subject: Reply with quote
I had a peek at the ratings after reading Peter's "Ouch" comment. My solution was essentially the same as Peter's.

Quote:
ER9 with hinge box8 SL r3c35; r8c3<>9, which sets up a
xy-wing 4-79 vertex (49)r3c3; r1c3,r8c1<>7
ER7 with hinge box2 SL r4c26; r1c2<>7 which sets up a
xy-wing 2-59 vertex (29)r2c6; r3c8<>5
xy-wing 47-8 vertex (47)r8c3; r12c2,r9c3<>8
BUG+1 forces r8c2=7

Ted
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Mon Aug 02, 2010 12:47 am    Post subject: Reply with quote
An insomiac's dream:

Quote:
1.ER r1c2<>7
2.ER r8c3<>9
3.<479> XY Wing vertex at r3c3; r1c3,r8c1<>7
4.<259> XY Wing vertex at r2c6; r3c8<>5
5.<478> XY Wing vertex at r7c2; r12c2, r9c3<>8
6.<279> XY Wing vertex at r6c4; r7c2<>7
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Aug 02, 2010 1:41 am    Post subject: Reply with quote
Interesting! Although the choice/order of steps varied slightly, it seems that the actual eliminations were locked -- except for the XY-Wing vs. BUG+1 as the last step.

My solver followed the same general steps.

Code:
 r24\c26 finned  X-Wing                  <> 7    r1c2   -or-
 r4  b2  Empty Rectangle                 <> 7    r1c2
-plus-
 r39\c35 finned  X-Wing                  <> 9    r8c3   -or-
 r3  b8  Empty Rectangle                 <> 9    r8c3

 <49+7>  XY-Wing  r3c3/r2c1+r8c3         <> 7    r1c3,r8c1

 c34\r68 finned  X-Wing                  <> 7    r8c5   extraneous

 <29+5>  XY-Wing  r2c6/r2c8+r3c5         <> 5    r3c8

 <47+8>  XY-Wing  r8c3/r1c3+r7c2         <> 8    r12c2,r9c3

         BUG+1                           =  7    r8c2
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Mon Aug 02, 2010 9:42 am    Post subject: Reply with quote
Danny, After the 2 ERs I just ploughed on with 4 xy wings and your solver didn't seem to get the final one. Did I make a mistake ? I ask because I am not minded to revisit this one ! Smile
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Aug 02, 2010 2:43 pm    Post subject: Reply with quote
Mogulmeister wrote:
Danny, After the 2 ERs I just ploughed on with 4 xy wings and your solver didn't seem to get the final one. Did I make a mistake ? I ask because I am not minded to revisit this one ! Smile

You didn't make a mistake. My last comment (apparently) wasn't clear. You're fine!

I wrote:
Interesting! Although the choice/order of steps varied slightly, it seems that the actual eliminations were locked -- except for the XY-Wing vs. BUG+1 as the last step.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Aug 02, 2010 4:50 pm    Post subject: Reply with quote
ERs (9,7)
XY-Wing (497)
XY-Wing (295)
XY-Wing (478)
BUG+1
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