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Puzzle 10/07/03: VH

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Jul 03, 2010 4:51 am Post subject: Puzzle 10/07/03: VH

Code:

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

Play this puzzle online at the Daily Sudoku site

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Sat Jul 03, 2010 2:10 pm Post subject:

Same technique used twice.......

Quote:

Almost xy-wing -235 with vertex (35)r8c3 and fin (7)r7c6
If xy-wing is true; r6c8<>2
If fin is true: (7)r6c3-(7=5)r5c3-(5=3)r8c3-(3=2)r8c8; r6c8<>2

Almost xy-wing 23-8 with vertex (23)r8c8 and fin (3)r8c4
If xy-wing is true: r8c9<>8
If fin is true: (3)r8c4-(3=5)r8c3-(5=8)r9c1-r7c1=(8)r7c9; r8c9<>8

Ted

peterj

Joined: 26 Mar 2010
Posts: 974
Location: London, UK

Posted: Sat Jul 03, 2010 5:06 pm Post subject:

Same technique used twice Smile

(though probably didn't have as much fun as Ted Laughing

) ...

Quote:

xy-wing(58-3) r9c1; r8c4<>3
xy-wing(23-8 ) r8c8; r8c9<>8

So in the spirit of fun and adventure, a nice one-stepper...

Quote:

gm-wing(58 ) (8=5)r9c1 - r9c7=(5-8)r8c9=r7c9; r7c1<>8

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