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Set T_03 Puzzle 106 -- VH+

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Apr 24, 2009 12:10 am    Post subject: Set T_03 Puzzle 106 -- VH+ Reply with quote
Code:
 +-----------------------+
 | . . . | . . 8 | 1 . . |
 | . 5 . | . 1 . | . . . |
 | . . 9 | . . 7 | . 8 . |
 |-------+-------+-------|
 | . . . | . 7 1 | 9 . . |
 | . 9 . | 6 5 . | 7 . . |
 | 8 . 7 | 9 . . | 3 . . |
 |-------+-------+-------|
 | 1 . . | 7 2 9 | 6 3 . |
 | . . 2 | . . . | 8 9 . |
 | . . . | . . . | . . 1 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== Ratings are Accumulative

Basics: Naked/Hidden Single, Naked Pair/Triple, Locked Candidate 1/2

Basics+: Naked Quad, Hidden Pair/Triple/Quad

VH: BUG+1, UR Type 1, X-Wing, XY-Wing

VH+: 2-String Kite, Empty Rectangle, Remote Pair, Skyscraper, finned X-Wing, UR Type 2

Advanced: M-Wing, W-Wing, XYZ-Wing, XY-Chain, other URs

Extreme: Chain, Loop, SIN (Single Inference Network)
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sat Apr 25, 2009 2:48 am    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 23467  234    346   | 2345   9      8     | 1      2567   236   |
| 23467  5      8     | 234    1      46    | 24     267    9     |
| 2346   1      9     | 2345   36     7     | 245    8      236   |
:---------------------+---------------------+---------------------:
| 5      234    34    | 8      7      1     | 9      246    26    |
| 24     9      1     | 6      5      3     | 7      24     8     |
| 8      6      7     | 9      4      2     | 3      1      5     |
:---------------------+---------------------+---------------------:
| 1      8      5     | 7      2      9     | 6      3      4     |
| 346    34     2     | 1      36     5     | 8      9      7     |
| 9      7      36    | 34     8      46    | 25     25     1     |
'---------------------'---------------------'---------------------'

very sneaky...
FINALLY found the key move...
Quote:
the kite on 3... r2c1= r2c4 - r9c4 = r8c5

which is followed by two xy-wings.
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