## Stuck and need help/hint!

Post the puzzle or solving technique that's causing you trouble and someone will help

### Stuck and need help/hint!

Hi! I am new to this forum and Sudoku, and got stuck with this puzzle. Wonder if anyone can help me with a hint/lead?

Original puzzle:
Code: Select all
`. . . | . . . | . 8 . . . . | 8 9 . | . . 2 1 8 . | 7 . 3 | 5 . . ------+-------+------ . 2 . | . . . | . 5 . 5 . 7 | . 4 . | 2 . 9 . 6 . | . . . | . 7 . ------+-------+------ . . 4 | 2 . 7 | . 9 3 2 . . | . 3 1 | . . . . 7 . | . . . | . . . `

Got stucked at this stage and can't proceed further for a few days already!
Code: Select all
`36  345 2   | 14  16  456 | 9    8   7  7   45  56  | 8   9   456 | 13   13  2  1   8   9   | 7   2   3   | 5    46  46 ------------+-------------+------------ 4   2   138 | 13  7   9   | 1368 5   16 5   13  7   | 6   4   8   | 2    13  9 9   6   138 | 135 15  2   | 1348 7   14 ------------+-------------+------------ 68  15  4   | 2   568 7   | 16   9   3 2   9   56  | 45  3   1   | 7    46  8 368 7   13  | 9   68  46  | 146  2   5 `
suzette

Posts: 5
Joined: 20 February 2006

If you look in column 9, both the possible 1s are in the same box, meaning one of them must be true. That means you can erase the other 1s from the same box. That should get you rolling again.
vidarino

Posts: 295
Joined: 02 January 2006

Hi suzette,

Looking at the original puzzle & then at the pencilmarks,

it must be annoying to miss something which you've on several occasions in the same puzzle managed to spot & successfully eliminate candidates........

Happens to the best of us

Tarek

tarek

Posts: 2631
Joined: 05 January 2006

Aiyah! How can I miss such an easy one?! Thanks for the lead, folks. Whew!
suzette

Posts: 5
Joined: 20 February 2006

There is also an xy-wing that enables a 4 to be placed in r8c8

Code: Select all
`36  345 2   | 14  16  456 | 9    8   7  7   45  56  | 8   9   456 | 13   13  2  1   8   9   | 7   2   3   | 5    46  46 ------------+-------------+------------ 4   2   138 | 13  7   9   | 1368 5   16 5   13  7   | 6   4   8   | 2    13  9 9   6   138 | 135 15  2   | 1348 7   14 ------------+-------------+------------ 68 *15  4   | 2   568 7   |*16   9   3 2   9  *56  | 45  3   1   | 7    46  8 368 7   13  | 9   68  46  | 146  2   5 `

If r7c2=5=>r8c3=6=>r8c8=4
If r7c2=1=>r7c7=6=>r8c8=4
Therefore r8c8=4

MCC
MCC

Posts: 1275
Joined: 08 June 2005

Code: Select all
`6   3   2   4   1   5   9   8   77   4   5   8   9   6   3   1   21   8   9   7   2   3   5   6   4----------------------------------------------------------4   2   3   1   7   9   8   5   65   1   7   6   4   8   2   3   99   6   8   3   5   2   4   7   1----------------------------------------------------------8   5   4   2   6   7   1   9   32   9   6   5   3   1   7   4   83   7   1   9   8   4   6   2   5 `

The answer~
windbell

Posts: 6
Joined: 21 February 2006

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