dailysudoku.com :: View topic - Pattern GSF 3/5/12

dailysudoku.com
Discussion of Daily Sudoku puzzles

FAQ

Memberlist

Usergroups

Profile

Pattern GSF 3/5/12

dailysudoku.com Forum Index -> Other puzzles

View previous topic :: View next topic

Author

Message

arkietech

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

Posted: Fri Mar 09, 2012 12:03 am Post subject: Pattern GSF 3/5/12

Code:

*-----------*
|1..|23.|..4|
|..2|..5|.7.|
|.7.|...|1..|
|---+---+---|
|5..|...|.3.|
|6..|.8.|..1|
|.9.|...|.2.|
|---+---+---|
|..9|...|6..|
|.6.|4.8|...|
|8..|.1.|..5|
*-----------*

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Fri Mar 09, 2012 2:33 am Post subject:

I would've preferred a non-chain solution, but there are at least two XY-Chains and one AIC whereby r6c5=5 proves r3c6=4; r3c5<>4.

Code:

+--------+-------------+--------+
| 1 5 8 | 2 3 7 | 9 6 4 |
| 9 4 2 | 1 6 5 | 8 7 3 |
| 3 7 6 | 8 49 49 | 1 5 2 |
+--------+-------------+--------+
| 5 8 14 | 79 249 1249 | 47 3 6 |
| 6 2 34 | 57 8 34 | 57 9 1 |
| 7 9 13 | 36 45 136 | 45 2 8 |
+--------+-------------+--------+
| 4 1 9 | 35 25 23 | 6 8 7 |
| 2 6 5 | 4 7 8 | 3 1 9 |
| 8 3 7 | 69 1 69 | 2 4 5 |
+--------+-------------+--------+

Play this puzzle online at the Daily Sudoku site

arkietech

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

Posted: Fri Mar 09, 2012 7:02 am Post subject:

Marty R. wrote:

I would've preferred a non-chain solution

Look for a nice Sue de Cog in Block 5 and Col 4. Finished with a Bug+1

A simpler solution is:

Code:

*-----------------------------------------------------------*
| 1 5 8 | 2 3 7 | 9 6 4 |
| 9 4 2 | 1 6 5 | 8 7 3 |
| 3 7 6 | 8 a49 49 | 1 5 2 |
|-------------------+-------------------+-------------------|
| 5 8 14 |d79 24-9 1249 | 47 3 6 |
| 6 2 34 |c57 8 34 | 57 9 1 |
| 7 9 13 | 36 b45 136 | 45 2 8 |
|-------------------+-------------------+-------------------|
| 4 1 9 | 35 25 23 | 6 8 7 |
| 2 6 5 | 4 7 8 | 3 1 9 |
| 8 3 7 | 69 1 69 | 2 4 5 |
*-----------------------------------------------------------*
xy-chain
(9=4)r3c5-(4=5)r6c5-(5=7)r5c4-(7=9)r4c4 => r4c5<>9

JC Van Hay

Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

Posted: Fri Mar 09, 2012 7:52 am Post subject:

A non-chain solution ... Very Happy

Code:

+----------+---------------------+----------+
| 1 5 8 | 2 3 7 | 9 6 4 |
| 9 4 2 | 1 6 5 | 8 7 3 |
| 3 7 6 | 8 49 49 | 1 5 2 |
+----------+---------------------+----------+
| 5 8 14 | (79) 2[4]9 12[49] | 47 3 6 |
| 6 2 34 | (57) 8 (34) | 57 9 1 |
| 7 9 13 | -36 (45) 1[3]6 | 45 2 8 |
+----------+---------------------+----------+
| 4 1 9 | 35 25 23 | 6 8 7 |
| 2 6 5 | 4 7 8 | 3 1 9 |
| 8 3 7 | 69 1 69 | 2 4 5 |
+----------+---------------------+----------+

BUG
||
4r4c56-(4=3)r5c6
||
9r4c6-(9=7)r4c4-(7=5)r5c4-(5=4)r6c5-(4=3)r5c6
||
3r6c6

=> 3r5c6=3r6c6 => -3r6c4; stte

Or

BUG + Naked Quin(34579)r4c456.r5c46.r6c56

=> -3r6c4; stte

ronk

Joined: 07 May 2006
Posts: 398

Posted: Fri Mar 09, 2012 11:40 am Post subject:

JC Van Hay wrote:

BUG
||
4r4c56-(4=3)r5c6
||
9r4c6-(9=7)r4c4-(7=5)r5c4-(5=4)r6c5-(4=3)r5c6
||
3r6c6

=> 3r5c6=3r6c6 => -3r6c4; stte

Nice one. Not surprisingly, bilocals work too.

Code:

BUG
||
(49-1)r4c6 = (1)r6c6
||
(4-2)r4c4 = (2-1)r4c6 = (1)r6c6
||
(3)r6c6

=> (1=3)r6c6 => r6c6<>6; stte

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