## This is supposed to be easy

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

### This is supposed to be easy

I'm an intermediate a Sudoku but his is supposedly an easy puzzle ... however, I'm stumped. Any one have a suggestion on the nexts step? Thank you!!

x 4 x ! 7 x 6 ! 3 x x
3 x x ! x 1 x ! 8 x x
5 x 1 ! 4 3 x ! 8 x x
------+-------+------
4 x x ! x 7 x ! x 8 9
7 2 9 ! 8 4 1 ! x 3 x
8 x x ! x 5 x ! x x 7
------+------+-------
x x 4 ! 1 x x ! 9 x 3
1 x x ! x 2 x ! x x x
x x 7 ! 3 x 4 ! x 5 x
5krunner

Posts: 22
Joined: 19 December 2005

Hi 5krunner.

In your puzzle there are two "8" in column seven. You have to correct the grid.

Regards, Carcul
Carcul

Posts: 724
Joined: 04 November 2005

### Re: This is supposed to be easy

5krunner wrote:this is supposedly an easy puzzle

however, I'm stumped

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

the 2 for box 7 must be in c1

this settles r1c1

- Pat

Pat

Posts: 3653
Joined: 18 July 2005

Sorry ... here's the corrected puzzle:

x 4 x ! 7 x 6 ! 3 x x
3 x x ! x 1 x ! x x 4
5 x 1 ! 4 3 x ! 8 x x
------+-------+------
4 x x ! x 7 x ! x 8 9
7 2 9 ! 8 4 1 ! x 3 x
8 x x ! x 5 x ! x x 7
------+------+-------
x x 4 ! 1 x x ! 9 x 3
1 x x ! x 2 x ! x x x
x x 7 ! 3 x 4 ! x 5 x
5krunner

Posts: 22
Joined: 19 December 2005

After a pinned square, the rest is forced moves. Here's the pin:

The pin is R1C9, which has to be 5.
ihope127

Posts: 22
Joined: 25 December 2005

Only one cell in row one can still take a 5.
tso

Posts: 798
Joined: 22 June 2005

5krunner

It would help us to help you if in future you would post your candidate list at the same time you post the puzzle you're stuck on.

This is the candidate list for your puzzle, I'll assume this is where you're at.

Code: Select all
`29    4     28  |7    89   6    |3     129   125 3     6789  268 |259  1    2589 |2567  2679  4  5     679   1   |4    3    29   |8     2679  26  ------------------------------------------------4     1356  356 |26   7    23   |126   8     9  7     2     9   |8    4    1    |56    3     56  8     136   36  |269  5    239  |1246  1246  7   ------------------------------------------------26    568   4   |1    68   578  |9     267   3   1     35689 3568|59   2    5789 |467   467   68  269   689   7   |3    689  4    |126   5     128`

Naked triplet in r1 enables you to place two numbers in box 3
The 2's are locked in c1 box7. So r1c1 can be placed.

That should see you on your way.

MCC
MCC

Posts: 1275
Joined: 08 June 2005

This is an easy puzzle that does not require candidates -- it is solved completely using nothing but singles.
tso

Posts: 798
Joined: 22 June 2005

tso wrote:This is an easy puzzle that does not require candidates -- it is solved completely using nothing but singles.

One single.
ihope127

Posts: 22
Joined: 25 December 2005

MCC wrote:29 4 28 7 89 6 3 129 125
Naked triplet in r1 enables you to place two numbers in box 3

Thanks

Mac
QBasicMac

Posts: 441
Joined: 13 July 2005

ihope127 wrote:
tso wrote:This is an easy puzzle that does not require candidates -- it is solved completely using nothing but singles.

One single.

One hidden, many naked.

What you're calling a pin, I'm calling a hidden single.
What you're calling a forced move, I'm calling a naked single.

QBasicMac wrote:
MCC wrote:29 4 28 7 89 6 3 129 125
Naked triplet in r1 enables you to place two numbers in box 3

Thanks

Mac

[29][28][89] is a naked triple. This is a perfectly valid triple making perfectly valid eliminations -- though again, the pin or hidden single followed by forced moves/naked singles is the simpler way to go and does not require candidates to be filled in. But if your goal is NOT to do things the simple way, this is actually a way to make easy puzzles like this more interesting, there are *lots* of more complex tactics available. There is another triple available -- row346c6 is a triple in [239]. Better (or worse), there is a 4 cell nice loop in r17c15...

Code: Select all
` *--------------------------------------------------------------------* |29------------(9)-------------89      .      | .      .      .      | | |      .      .      | .      |      .      | .      .      .      | | |      .      .      | .      |      .      | .      .      .      | |-|--------------------+--------|-------------+----------------------| |(2)     .      .      | .     (8)     .      | .      .      .      | | |      .      .      | .      |      .      | .      .      .      | | |      .      .      | .      |      .      | .      .      .      | |-|--------------------+--------|-------------+----------------------| |26------------(6)-------------68      .      | .      .      .      | | .      .   .  .      | .      .      .      | .      .      .      | | .      .      .      | .      .      .      | .      .      .      | *--------------------------------------------------------------------*`

... eliminating 9s from the rest of the top row, 6s from the rest of row 7, 2s from the rest of column 1 and 8s from the rest of column 5.

Again, a perfectly valid deduction, very possibly more fun than simply filling in all the singles.
tso

Posts: 798
Joined: 22 June 2005

tso wrote:One hidden, many naked.

What you're calling a pin, I'm calling a hidden single.
What you're calling a forced move, I'm calling a naked single.

Aha. Hadn't really thought of them as naked singles.
ihope127

Posts: 22
Joined: 25 December 2005

Thank you everyone for the excellent advise. I'm slowly learning.
5krunner

Posts: 22
Joined: 19 December 2005

tso wrote:[29][28][89] is a naked triple

Thanks!! I don't know how long I could stare at that line and not see it.

Mac
QBasicMac

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Joined: 13 July 2005

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Guest

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