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Set T_03 Puzzle 84 -- VH+

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Fri Apr 17, 2009 1:45 pm Post subject: Set T_03 Puzzle 84 -- VH+

Code:

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

Play this puzzle online at the Daily Sudoku site

Code:

c2b4 Naked Pair <> 38 [r6c3]
c3b7 cloned Pair <> 35 [r6c3]
r9 Naked Pair <> 35 [r9c478]
r9 b9 Naked Pair <> 19 [r8c89]

r6 Naked Quad <> 1238 [r6c578]

r57 X-Wing <> 8 [r4c68],[r8c68]

UR Type 1 [r79c36] <> 35 [r7c6]

c4b5 UR Type 2 [r46c24] <> 1 [r5c5],[r8c4]

XY-Wing [r4c6]/[r4c2]+[r5c6] <> 8 [r4c4]
XY-Wing [r7c6]/[r7c7]+[r8c4] <> 3 [r8c7] sufficient
XY-Wing [r7c7]/[r7c3]+[r8c8] <> 5 [r7c8]

XY-Wing [r4c6]/[r4c7]+[r8c6] <> 4 [r8c7] sufficient
XY-Wing [r8c6]/[r4c6]+[r8c7] <> 2 [r4c7]

Last edited by daj95376 on Fri Apr 24, 2009 8:48 pm; edited 1 time in total

tlanglet

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

Posted: Sun Apr 19, 2009 12:39 am Post subject:

Another nice, fun VH.

Quote:

Type 2 UR38,
Type 3 UR19,
xy-wing128.

Ted

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Sun Apr 19, 2009 8:12 am Post subject:

Code:

.------------------.------------------.------------------.
| 3 1 7 | 5 8 6 | 9 2 4 |
| 2 6 8 | 4 3 9 | 1 7 5 |
| 5 9 4 | 2 7 1 | 8 3 6 |
:------------------+------------------+------------------:
| 7 38 6 | 138 5 2348 | 24 1489 1289 |
| 4 5 F12 | 9 16 E28 | 7 168 3 |
| 9 38 G12 | 138 46 7 | 45 456 H1-28 |
:------------------+------------------+------------------:
| 1 2 35 | 6 9 D3458 | 345 458 7 |
| 6 7 9 |C138 14 B3458 | 2345 458 A28 |
| 8 4 35 | 7 2 35 | 6 19 19 |
'------------------'------------------'------------------'

this w-wing {2,8} is extended by the 2's
(2=8)A - (8)BC = (8)D - (8=2)E - (2)F = (2)G; H is not 2
for a one stepper.

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