Sudoku

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Sadia Zareen

Educación

Easy 4 by 4 puzzle
A. 4 3
1 4
3 4 1
2
For answers click once.

Easy 4 by 4 puzzle
A. 4 3 1 2
2 1 3 4
3 2 4 1
1 4 2 3

Easy 4 by 4 puzzle
B.
1 4
3 1
1 3
4 1
For answers click once.

Easy 4 by 4 puzzle
B. 3 1 4 2
4 2 3 1
1 3 2 4
2 4 1 3

Easy 4 by 4 puzzle
C.
4 2 3
3 4
3 4
4 2
For answers click once.

Easy 4 by 4 puzzle
C.
4 1 2 3
2 3 1 4
3 2 4 1
1 4 3 2

Easy 4 by 4 puzzle
D.
3 1 4
2
1 4
4 3
For answers click once.

Easy 4 by 4 puzzle
D.
3 1 4 2
4 2 3 1
2 3 1 4
1 4 2 3

4 by 4 puzzle
E.
3 4 2
3
1
3 2 1
For answers click once.

4 by 4 puzzle
E.
1 3 4 2
2 4 3 1
4 1 2 3
3 2 1 4

4 by 4 puzzle
F.
2 4 1
4
4
1 2 3
For answers click once.

4 by 4 puzzle
F.
2 3 4 1
4 1 3 2
3 2 1 4
1 4 2 3

4 by 4 puzzle
G.
3 1
4 1
1 4
1 3
For answers click once.

4 by 4 puzzle
G.
3 1 4 2
4 2 3 1
1 3 2 4
2 4 1 3

4 by 4 puzzle
H.
1 4 2
1
4
2 3 4
For answers click once.

4 by 4 puzzle
H.
1 4 2 3
3 2 4 1
4 1 3 2
2 3 1 4

Easy 6 by 6 puzzle
I. 2 4
3 5 2 6
4 5 3
4 2 1
2 1 4 5
5 6
For answers click once.

Easy 6 by 6 puzzle
I. 6 2 4 3 1 5
1 3 5 2 4 6
4 5 6 1 3 2
5 4 3 6 2 1
2 6 1 4 5 3
3 1 2 5 6 4

Easy 6 by 6 puzzle
J. 3 2 5 6
4
1 6 3 4
2 4 5 1
3
5 1 4 2
For answers click once.

Easy 6 by 6 puzzle
J. 3 2 1 4 5 6
6 4 5 2 1 3
1 5 6 3 2 4
2 3 4 5 6 1
4 6 2 1 3 5
5 1 3 6 4 2

6 by 6 puzzle
K. 5 2 1 3
1 6 3 4 2

4 1 3 5 6
5 2 4 6
For answers click once.

6 by 6 puzzle
K. 6 4 5 2 1 3
1 5 6 3 4 2
2 3 1 4 6 5
3 6 2 1 5 4
4 1 3 5 2 6
5 2 4 6 3 1

Hard 6 by 6 puzzle
L. 5 6
6 3 5
3
3
2 5 4
1 5
For answers click once.

Hard 6 by 6 puzzle
L. 1 5 6 2 3 4
4 6 1 3 2 5
3 2 4 5 1 6
5 1 2 4 6 3
2 3 5 6 4 1
6 4 3 1 5 2

Hard 6 by 6 puzzle
M. 5 1 2
6 2
4
6
5 2
3 1 2
For answers click once.

Hard 6 by 6 puzzle
M. 3 4 5 1 2 6
6 5 2 4 1 3
1 2 3 6 4 5
2 6 4 3 5 1
4 1 6 5 3 2
5 3 1 2 6 4

9 6 2 7
N.
4 3 8 6
8 1 9 2
1 5 8 3 4 9
puzzle

7 9
9 8 6 5 1 3
9 by 9

5 9 7 3 2
9 6 4 8
4 2 1 5
For a hint click once; for answers click twice.

5 9 3 8 6 2 1 4 7
N.
7 2 4 1 5 3 9 8 6
6 8 1 9 7 4 2 3 5
1 5 8 3 4 9 7 6 2
puzzle

3 7 6 5 2 1 4 9 8
2 4 9 7 8 6 5 1 3
9 by 9

8 1 5 6 9 7 3 2 4
9 6 2 4 3 5 8 7 1
4 3 7 2 1 8 6 5 9

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Sudoku

1. by SADIA ZAREEN

2. Easy 4 by 4 puzzle A. 4 3 1 4 3 4 1 2 For answers click once.

3. Easy 4 by 4 puzzle A. 4 3 1 2 2 1 3 4 3 2 4 1 1 4 2 3

4. Easy 4 by 4 puzzle B. 1 4 3 1 1 3 4 1 For answers click once.

5. Easy 4 by 4 puzzle B. 3 1 4 2 4 2 3 1 1 3 2 4 2 4 1 3

6. Easy 4 by 4 puzzle C. 4 2 3 3 4 3 4 4 2 For answers click once.

7. Easy 4 by 4 puzzle C. 4 1 2 3 2 3 1 4 3 2 4 1 1 4 3 2

8. Easy 4 by 4 puzzle D. 3 1 4 2 1 4 4 3 For answers click once.

9. Easy 4 by 4 puzzle D. 3 1 4 2 4 2 3 1 2 3 1 4 1 4 2 3

10. 4 by 4 puzzle E. 3 4 2 3 1 3 2 1 For answers click once.

11. 4 by 4 puzzle E. 1 3 4 2 2 4 3 1 4 1 2 3 3 2 1 4

12. 4 by 4 puzzle F. 2 4 1 4 4 1 2 3 For answers click once.

13. 4 by 4 puzzle F. 2 3 4 1 4 1 3 2 3 2 1 4 1 4 2 3

14. 4 by 4 puzzle G. 3 1 4 1 1 4 1 3 For answers click once.

15. 4 by 4 puzzle G. 3 1 4 2 4 2 3 1 1 3 2 4 2 4 1 3

16. 4 by 4 puzzle H. 1 4 2 1 4 2 3 4 For answers click once.

17. 4 by 4 puzzle H. 1 4 2 3 3 2 4 1 4 1 3 2 2 3 1 4

18. Easy 6 by 6 puzzle I. 2 4 3 5 2 6 4 5 3 4 2 1 2 1 4 5 5 6 For answers click once.

19. Easy 6 by 6 puzzle I. 6 2 4 3 1 5 1 3 5 2 4 6 4 5 6 1 3 2 5 4 3 6 2 1 2 6 1 4 5 3 3 1 2 5 6 4

20. Easy 6 by 6 puzzle J. 3 2 5 6 4 1 6 3 4 2 4 5 1 3 5 1 4 2 For answers click once.

21. Easy 6 by 6 puzzle J. 3 2 1 4 5 6 6 4 5 2 1 3 1 5 6 3 2 4 2 3 4 5 6 1 4 6 2 1 3 5 5 1 3 6 4 2

22. 6 by 6 puzzle K. 5 2 1 3 1 6 3 4 2 4 1 3 5 6 5 2 4 6 For answers click once.

23. 6 by 6 puzzle K. 6 4 5 2 1 3 1 5 6 3 4 2 2 3 1 4 6 5 3 6 2 1 5 4 4 1 3 5 2 6 5 2 4 6 3 1

24. Hard 6 by 6 puzzle L. 5 6 6 3 5 3 3 2 5 4 1 5 For answers click once.

25. Hard 6 by 6 puzzle L. 1 5 6 2 3 4 4 6 1 3 2 5 3 2 4 5 1 6 5 1 2 4 6 3 2 3 5 6 4 1 6 4 3 1 5 2

26. Hard 6 by 6 puzzle M. 5 1 2 6 2 4 6 5 2 3 1 2 For answers click once.

27. Hard 6 by 6 puzzle M. 3 4 5 1 2 6 6 5 2 4 1 3 1 2 3 6 4 5 2 6 4 3 5 1 4 1 6 5 3 2 5 3 1 2 6 4

28. 9 6 2 7 N. 4 3 8 6 8 1 9 2 1 5 8 3 4 9 puzzle 7 9 9 8 6 5 1 3 9 by 9 5 9 7 3 2 9 6 4 8 4 2 1 5 For a hint click once; for answers click twice.

29. 5 9 3 8 6 2 1 4 7 N. 7 2 4 1 5 3 9 8 6 6 8 1 9 7 4 2 3 5 1 5 8 3 4 9 7 6 2 puzzle 3 7 6 5 2 1 4 9 8 2 4 9 7 8 6 5 1 3 9 by 9 8 1 5 6 9 7 3 2 4 9 6 2 4 3 5 8 7 1 4 3 7 2 1 8 6 5 9

Notas del editor

Sudoku techniques Sudoku solving technique #1 Sole Candidate When all the other possibilities for the sudoku cell have been removed, and only one choice remains - then it must be the correct value. Sudoku solving technique #2 Unique Candidate If a cell is the only one in the row that can contain a certain number, then it must have that number. This is because every row of the sudoku must have each of the values 1-9. The same applies to columns and 3x3 blocks in the sudoku. Sudoku solving technique #3 Col/Row/Block interactions If you know that a number must occur in a certain row, then you can eliminate that number as a possibilty for other blocks in the same row. Eg, if you know that the number 4 must appear in the 1st row of block 1 (2nd and 3rd rows being full) then you know that the number 4 cannot occur in block 2 or 3 in the sudoku. This applies to columns as well. Sudoku solving technique #4 Naked subset if 2 squares in the same col/row/block have the same 2 candidates, then you can remove those numbers as candidates in the same col/row/block. This rule extends to cover 3 squares with the same 3 candidates, 4 etc.

Sudoku

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Notas del editor