What other strategies can I use with this sudoku puzzle?












6












$begingroup$


I have a sudoku puzzle that I have been doing for 270 hours.
I never guess numbers and always thought that every move in sudoku had to have a logical explanation. Until the app generated this random puzzle:



enter image description here



I've never used any kind of help from an internet, but now it seems the time has come. I watched some videos, looked into some guides (i.e. sudokusnake.com). And they only helped me to eliminate 9 as a candidate in I5, G8 using the empty rectangle technique. The current state of my sudoku is:




enter image description here




What can be done to solve this sudoku puzzle, other than guessing? Any tips/hints?






strategy sudoku







share|improve this question









New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$








  • 1




    $begingroup$
    Are you 100% sure that the numbers you've written are correct?
    $endgroup$
    – Natasha
    9 hours ago










  • $begingroup$
    @Natasha, yes, I checked it with autosolver
    $endgroup$
    – Qeeet
    9 hours ago






  • 1




    $begingroup$
    I am starting to solve this, so just wanted to confirm to decide if I should start from the beginning, or from the state of the second picture.
    $endgroup$
    – Natasha
    9 hours ago






  • 2




    $begingroup$
    Maybe some of these strategies might help to eliminate some candidates.
    $endgroup$
    – Kevin Cruijssen
    8 hours ago






  • 2




    $begingroup$
    I have written my own Sudoku solver. It implements level 1 techniques (single candidates and other forced moves, direct eliminations etc), and level 2 techniques (naked pairs, hidden pairs, x-wing etc) but not level 3 techniques (naked/hidden triples, swordfish, etc). The level is essentially how many moves it would take to reach a contradiction if you were to make a wrong guess instead of the move the technique tells you. To solve this sudoku my solver needed to guess at the point you got to, so your next step must be at least a level 3 technique.
    $endgroup$
    – Jaap Scherphuis
    7 hours ago
















6












$begingroup$


I have a sudoku puzzle that I have been doing for 270 hours.
I never guess numbers and always thought that every move in sudoku had to have a logical explanation. Until the app generated this random puzzle:



enter image description here



I've never used any kind of help from an internet, but now it seems the time has come. I watched some videos, looked into some guides (i.e. sudokusnake.com). And they only helped me to eliminate 9 as a candidate in I5, G8 using the empty rectangle technique. The current state of my sudoku is:




enter image description here




What can be done to solve this sudoku puzzle, other than guessing? Any tips/hints?






strategy sudoku







share|improve this question









New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$








  • 1




    $begingroup$
    Are you 100% sure that the numbers you've written are correct?
    $endgroup$
    – Natasha
    9 hours ago










  • $begingroup$
    @Natasha, yes, I checked it with autosolver
    $endgroup$
    – Qeeet
    9 hours ago






  • 1




    $begingroup$
    I am starting to solve this, so just wanted to confirm to decide if I should start from the beginning, or from the state of the second picture.
    $endgroup$
    – Natasha
    9 hours ago






  • 2




    $begingroup$
    Maybe some of these strategies might help to eliminate some candidates.
    $endgroup$
    – Kevin Cruijssen
    8 hours ago






  • 2




    $begingroup$
    I have written my own Sudoku solver. It implements level 1 techniques (single candidates and other forced moves, direct eliminations etc), and level 2 techniques (naked pairs, hidden pairs, x-wing etc) but not level 3 techniques (naked/hidden triples, swordfish, etc). The level is essentially how many moves it would take to reach a contradiction if you were to make a wrong guess instead of the move the technique tells you. To solve this sudoku my solver needed to guess at the point you got to, so your next step must be at least a level 3 technique.
    $endgroup$
    – Jaap Scherphuis
    7 hours ago














6












6








6


0



$begingroup$


I have a sudoku puzzle that I have been doing for 270 hours.
I never guess numbers and always thought that every move in sudoku had to have a logical explanation. Until the app generated this random puzzle:



enter image description here



I've never used any kind of help from an internet, but now it seems the time has come. I watched some videos, looked into some guides (i.e. sudokusnake.com). And they only helped me to eliminate 9 as a candidate in I5, G8 using the empty rectangle technique. The current state of my sudoku is:




enter image description here




What can be done to solve this sudoku puzzle, other than guessing? Any tips/hints?






strategy sudoku







share|improve this question









New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




I have a sudoku puzzle that I have been doing for 270 hours.
I never guess numbers and always thought that every move in sudoku had to have a logical explanation. Until the app generated this random puzzle:



enter image description here



I've never used any kind of help from an internet, but now it seems the time has come. I watched some videos, looked into some guides (i.e. sudokusnake.com). And they only helped me to eliminate 9 as a candidate in I5, G8 using the empty rectangle technique. The current state of my sudoku is:




enter image description here




What can be done to solve this sudoku puzzle, other than guessing? Any tips/hints?






strategy sudoku




strategy sudoku






share|improve this question









New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited 11 hours ago









Alconja

23.1k1397145




23.1k1397145






New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked 12 hours ago









QeeetQeeet

312




312




New contributor




Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Qeeet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 1




    $begingroup$
    Are you 100% sure that the numbers you've written are correct?
    $endgroup$
    – Natasha
    9 hours ago










  • $begingroup$
    @Natasha, yes, I checked it with autosolver
    $endgroup$
    – Qeeet
    9 hours ago






  • 1




    $begingroup$
    I am starting to solve this, so just wanted to confirm to decide if I should start from the beginning, or from the state of the second picture.
    $endgroup$
    – Natasha
    9 hours ago






  • 2




    $begingroup$
    Maybe some of these strategies might help to eliminate some candidates.
    $endgroup$
    – Kevin Cruijssen
    8 hours ago






  • 2




    $begingroup$
    I have written my own Sudoku solver. It implements level 1 techniques (single candidates and other forced moves, direct eliminations etc), and level 2 techniques (naked pairs, hidden pairs, x-wing etc) but not level 3 techniques (naked/hidden triples, swordfish, etc). The level is essentially how many moves it would take to reach a contradiction if you were to make a wrong guess instead of the move the technique tells you. To solve this sudoku my solver needed to guess at the point you got to, so your next step must be at least a level 3 technique.
    $endgroup$
    – Jaap Scherphuis
    7 hours ago














  • 1




    $begingroup$
    Are you 100% sure that the numbers you've written are correct?
    $endgroup$
    – Natasha
    9 hours ago










  • $begingroup$
    @Natasha, yes, I checked it with autosolver
    $endgroup$
    – Qeeet
    9 hours ago






  • 1




    $begingroup$
    I am starting to solve this, so just wanted to confirm to decide if I should start from the beginning, or from the state of the second picture.
    $endgroup$
    – Natasha
    9 hours ago






  • 2




    $begingroup$
    Maybe some of these strategies might help to eliminate some candidates.
    $endgroup$
    – Kevin Cruijssen
    8 hours ago






  • 2




    $begingroup$
    I have written my own Sudoku solver. It implements level 1 techniques (single candidates and other forced moves, direct eliminations etc), and level 2 techniques (naked pairs, hidden pairs, x-wing etc) but not level 3 techniques (naked/hidden triples, swordfish, etc). The level is essentially how many moves it would take to reach a contradiction if you were to make a wrong guess instead of the move the technique tells you. To solve this sudoku my solver needed to guess at the point you got to, so your next step must be at least a level 3 technique.
    $endgroup$
    – Jaap Scherphuis
    7 hours ago








1




1




$begingroup$
Are you 100% sure that the numbers you've written are correct?
$endgroup$
– Natasha
9 hours ago




$begingroup$
Are you 100% sure that the numbers you've written are correct?
$endgroup$
– Natasha
9 hours ago












$begingroup$
@Natasha, yes, I checked it with autosolver
$endgroup$
– Qeeet
9 hours ago




$begingroup$
@Natasha, yes, I checked it with autosolver
$endgroup$
– Qeeet
9 hours ago




1




1




$begingroup$
I am starting to solve this, so just wanted to confirm to decide if I should start from the beginning, or from the state of the second picture.
$endgroup$
– Natasha
9 hours ago




$begingroup$
I am starting to solve this, so just wanted to confirm to decide if I should start from the beginning, or from the state of the second picture.
$endgroup$
– Natasha
9 hours ago




2




2




$begingroup$
Maybe some of these strategies might help to eliminate some candidates.
$endgroup$
– Kevin Cruijssen
8 hours ago




$begingroup$
Maybe some of these strategies might help to eliminate some candidates.
$endgroup$
– Kevin Cruijssen
8 hours ago




2




2




$begingroup$
I have written my own Sudoku solver. It implements level 1 techniques (single candidates and other forced moves, direct eliminations etc), and level 2 techniques (naked pairs, hidden pairs, x-wing etc) but not level 3 techniques (naked/hidden triples, swordfish, etc). The level is essentially how many moves it would take to reach a contradiction if you were to make a wrong guess instead of the move the technique tells you. To solve this sudoku my solver needed to guess at the point you got to, so your next step must be at least a level 3 technique.
$endgroup$
– Jaap Scherphuis
7 hours ago




$begingroup$
I have written my own Sudoku solver. It implements level 1 techniques (single candidates and other forced moves, direct eliminations etc), and level 2 techniques (naked pairs, hidden pairs, x-wing etc) but not level 3 techniques (naked/hidden triples, swordfish, etc). The level is essentially how many moves it would take to reach a contradiction if you were to make a wrong guess instead of the move the technique tells you. To solve this sudoku my solver needed to guess at the point you got to, so your next step must be at least a level 3 technique.
$endgroup$
– Jaap Scherphuis
7 hours ago










1 Answer
1






active

oldest

votes


















0












$begingroup$

Hint (a little bit of guessing :-)




If you put 4 into A3 and go through simple elimination steps based on the options you have already figured out, you'll see that it was a wrong move. So A3 must be 9.







share|improve this answer









$endgroup$













  • $begingroup$
    I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
    $endgroup$
    – Qeeet
    4 hours ago











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1 Answer
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oldest

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1 Answer
1






active

oldest

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active

oldest

votes






active

oldest

votes









0












$begingroup$

Hint (a little bit of guessing :-)




If you put 4 into A3 and go through simple elimination steps based on the options you have already figured out, you'll see that it was a wrong move. So A3 must be 9.







share|improve this answer









$endgroup$













  • $begingroup$
    I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
    $endgroup$
    – Qeeet
    4 hours ago
















0












$begingroup$

Hint (a little bit of guessing :-)




If you put 4 into A3 and go through simple elimination steps based on the options you have already figured out, you'll see that it was a wrong move. So A3 must be 9.







share|improve this answer









$endgroup$













  • $begingroup$
    I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
    $endgroup$
    – Qeeet
    4 hours ago














0












0








0





$begingroup$

Hint (a little bit of guessing :-)




If you put 4 into A3 and go through simple elimination steps based on the options you have already figured out, you'll see that it was a wrong move. So A3 must be 9.







share|improve this answer









$endgroup$



Hint (a little bit of guessing :-)




If you put 4 into A3 and go through simple elimination steps based on the options you have already figured out, you'll see that it was a wrong move. So A3 must be 9.








share|improve this answer












share|improve this answer



share|improve this answer










answered 5 hours ago









ppgdevppgdev

1306




1306












  • $begingroup$
    I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
    $endgroup$
    – Qeeet
    4 hours ago


















  • $begingroup$
    I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
    $endgroup$
    – Qeeet
    4 hours ago
















$begingroup$
I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
$endgroup$
– Qeeet
4 hours ago




$begingroup$
I had to solve almost all puzzle to check if 4 suits the cell i.postimg.cc/hP7vV3Ys/sudoku0001-er1.png there must be easier step
$endgroup$
– Qeeet
4 hours ago










Qeeet is a new contributor. Be nice, and check out our Code of Conduct.










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