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Puzzle 10/09/08: A1 VH

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Sep 08, 2010 2:09 am    Post subject: Puzzle 10/09/08: A1 VH Reply with quote
Last pair of VH-rated puzzles. They have a limited number of technique choices and my generator heavily favors XY-Wings. Forcing me to scan a large number of puzzles hoping to find some variety. Expect turbot/VH+ rated puzzles to replace them.

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

Play this puzzle online at the Daily Sudoku site


===== ===== ===== ===== Ratings are Accumulative in Techniques ===== ===== =====

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

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

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

turbot:    2-String Kite, Skyscraper, Empty Rectangle, finned/Sashimi X-Wing
VH+:       Remote Pair, XYZ-Wing, UR Type 2/4
Advanced:  turbot and VH+

XY:        gM-Wing, W-Wing, XY-Chain, BUG+2, BUG+3, other URs

Extreme:   Chain, Loop, SIN (Single Inference Network)
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
PostPosted: Wed Sep 08, 2010 9:09 am    Post subject: Reply with quote
Quote:
Type 1 UR(57)R57C12 : => r5c1<>57=4
XY Wing (-567), pivot at R3C1 : => r1c56<>5
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