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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Sun Jun 17, 2012 10:19 pm Post subject: Jun 18 VH |
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XY-Wing 38 13 18 pivoted in r5c2; r1c6<>8 solves it.
Also the the following:-
Remote Pairs 13; r1c2<>3
A kite on 3 originating from BOX 1; r6c5<>3
BUG+1; r2c2=3. |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Mon Jun 18, 2012 9:00 am Post subject: Jun 18 VH |
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| Code: |
+----------+----------+--------+
| 9 38 4 | 5 13 18 | 2 7 6 |
| 13 138 7 | 2 9 6 | 4 5 38 |
| 5 2 6 | 38 4 7 | 9 1 38 |
+----------+----------+--------+
| 8 6 9 | 4 2 5 | 1 3 7 |
| 4 13 5 | 38 7 18 | 6 9 2 |
| 13 7 2 | 6 13 9 | 8 4 5 |
+----------+----------+--------+
| 6 4 3 | 1 5 2 | 7 8 9 |
| 2 9 1 | 7 8 3 | 5 6 4 |
| 7 5 8 | 9 6 4 | 3 2 1 |
+----------+----------+--------+
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Play this puzzle online at the Daily Sudoku site
Is this the simplest after-basics VH diagram ever? (Apart
from those that come out with baiscs only of course....) |
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RobertRattley
Joined: 24 Jun 2007
Posts: 118
Location: Australia
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| Posted: Thu Jun 28, 2012 2:27 pm Post subject: |
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"Is this the simplest after-basics VH diagram ever?"
It's the simplest I've ever seen. Surely it must be the simplest possible, or close to it, that still needs a "very hard" technique.
Amazing. |
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Pat
Joined: 23 Feb 2010
Posts: 207
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| Posted: Sun Jul 01, 2012 7:18 am Post subject: re: Is this the simplest after-basics VH diagram ever? |
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| hughwill wrote: | | Is this the simplest after-basics VH diagram ever? |
examples have been seen where only 11 cells remain unsolved
here's one from Ruud (2006.Feb.11)
( 2nd puzzle in his post ) | Code: |
. . . | 1 . . | 9 8 .
4 . . | . 5 2 | 6 . .
. . . | . . . | . 1 .
-------+-------+------
9 . . | . 4 . | . 3 .
. 7 . | . . . | . 9 .
. 6 . | . 8 . | . . 2
-------+-------+------
. 1 . | . . . | . . .
. . 9 | 8 2 . | . . 7
. 4 3 | . . 5 | . . .
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24 cells given + 46 "singles" = 70 cells known --
.3.1.498548195267359..3821492854713637521649816438975281.4.35.9659821347.43.958.1
[ play ] |
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