dailysudoku.com :: View topic - For Valentine's Day

dailysudoku.com
Discussion of Daily Sudoku puzzles

FAQ

Memberlist

Usergroups

Profile

For Valentine's Day

dailysudoku.com Forum Index -> Other puzzles

View previous topic :: View next topic

Author

Message

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Thu Feb 14, 2008 7:44 am Post subject: For Valentine's Day

Posted by ravel last year, in a different forum:

Code:

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

http://www.sudoku.com/boards/viewtopic.php?t=5255&highlight=valentines

Keith

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Fri Feb 15, 2008 3:39 am Post subject:

Code:

|---c1--|---c2--|---c3--||---c4--|---c5--|---c6--||---c7--|---c8--|---c9--
-----------------------------------------------------------------------------
r1 | 5 | 4 | 3 || 1 | 7 | 6 || 9 | 2 | 8
---+-------+-------+-------||-------+-------+-------||-------+-------+-------
r2 | 6 | 1 | 7 || 2 | 9 | 8 || 5 | 3 | 4
---+-------+-------+-------||-------+-------+-------||-------+-------+-------
r3 | 9 | 2 | 8 || 3 | 5 | 4 || 7 | 1 | 6
===========================||=======================||=======================
r4 | 4 | 9 | 12 || 56 | 8 | 7 || 12 | 56 | 3
---+-------+-------+-------||-------+-------+-------||-------+-------+-------
r5 | 3 | 7 | 56 || 456 | 1246 | 25 || 1246 | 8 | 9
---+-------+-------+-------||-------+-------+-------||-------+-------+-------
r6 | 12 | 8 | 56 || 9 | 1246 | 3 || 1246 | 7 | 125
===========================||=======================||=======================
r7 | 17 | 3 | 9 || 456 | 246 | 25 || 8 | 46 | 17
---+-------+-------+-------||-------+-------+-------||-------+-------+-------
r8 | 8 | 56 | 24 || 7 | 246 | 1 || 3 | 9 | 25
---+-------+-------+-------||-------+-------+-------||-------+-------+-------
r9 | 127 | 56 | 124 || 8 | 3 | 9 || 126 | 456 | 1257
.............................................................................

first three rows solved and yet it doesn't solve.

I began with a coloring on 2

I had to look up the rules of a UR and I believe there is a type 4b UR on {1,7} in col r79c19... it eliminates the 1 in both r9c1 and r9c9

x-wing on 1 then I was stuck looking for xy-chains when I saw the xyz-wing Embarassed

doh !!

xyz-wing {4,5,6} pivot in r9c8 eliminates the 6 in r9c7 will finish it off.

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