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VH+

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ravel

Joined: 21 Apr 2006
Posts: 536

Posted: Mon Mar 17, 2008 6:44 pm Post subject: VH+

Searched for a new pattern today, these two are solvable with VH methods plus UR, skysraper/kite (turbot fish, coloring) and w-wing

Code:

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

>>> play online

Code:

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

>>> play online

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Mon Mar 17, 2008 7:22 pm Post subject:

the first puzzle...

I'll start with the URs

Code:

16 3 8 | 7 4 125 | 56 126 9
2 76 167 | 58 9 358 | 45 34 16
4 9 5 | 12 6 123 | 8 1237 127
------------------------------------------------------------------
9 5 26 | 26 8 4 | 3 17 17
76 1 3 | 9 5 76 | 2 8 4
78 248 24 | 3 1 27 | 69 69 5
------------------------------------------------------------------
5 2468 2469 | 468 7 68 | 1 2469 3
3 467 14679 | 1456 2 156 | 469 469 8
168 2468 1246 | 1468 3 9 | 7 5 26

a very nice type 2 UR on {6,9} in boxes 6 and 9 eliminates the 4s in r8c234 and r7c8

then the {1,7} UR in boxes 3 and 6, removes 1 from r3c89

then the {6,7} UR in boxes 1 and 7 removes the 6 from r28c3

edit:

there are some steps in between, especially between the {1,7} UR and the {6,7} UR

Last edited by storm_norm on Mon Mar 17, 2008 8:49 pm; edited 1 time in total

Victor

Joined: 29 Sep 2005
Posts: 207
Location: NI

Posted: Mon Mar 17, 2008 8:48 pm Post subject:

And colouring on 6s finishes off.

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Mon Mar 17, 2008 9:51 pm Post subject:

the second puzzle...

Code:

3 7 5 | 9 248 128 | 46 18 246
4 2 9 | 17 6 158 | 58 37 13
1 6 8 | 247 3 25 | 9 57 24
------------------------------------------------------------------
8 9 46 | 1246 24 7 | 456 35 15
56 1 3 | 468 458 9 | 7 2 46
2 45 7 | 3 45 16 | 68 18 9
------------------------------------------------------------------
56 58 1 | 268 9 268 | 3 4 7
7 48 46 | 68 1 3 | 2 9 5
9 3 2 | 5 7 4 | 1 6 8

the x-wing on 1 removes the 1 in r2c6

leads too...

Code:

3 7 5 | 9 248 R1(2)8 | 46 G1R8 246
4 2 9 | 17 6 G5R8 | R5G8 37 13
1 6 8 | 247 3 G2R5 | 9 57 24
------------------------------------------------------------------
8 9 46 | 1246 24 7 | 456 35 15
56 1 3 | 468 458 9 | 7 2 46
2 45 7 | 3 45 16 | 68 18 9
------------------------------------------------------------------
56 58 1 | 268 9 268 | 3 4 7
7 48 46 | 68 1 3 | 2 9 5
9 3 2 | 5 7 4 | 1 6 8

start medusa coloring in r2c6 {5,8}

the 2 in r1c6 shares a cell with a red 1 and sees a green 2 in r3c6... not allowed... the 2 in r1c6 is history. which breaks it.

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