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

This Sudoku Puzzle has 36 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Triple, Locked Candidates Type 1 (Pointing), undefined, Empty Rectangle, Give Up techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 6 → 4 (Hidden Single)
  2. Row 6 / Column 4 → 8 (Hidden Single)
  3. Row 4 / Column 2 → 4 (Hidden Single)
  4. Row 6 / Column 2 → 7 (Hidden Single)
  5. Row 3 / Column 1 → 7 (Hidden Single)
  6. Row 7 / Column 9 → 2 (Hidden Single)
  7. Row 8 / Column 1 → 4 (Hidden Single)
  8. Row 1 / Column 2 → 3 (Hidden Single)
  9. Row 1 / Column 7 → 9 (Hidden Single)
  10. Row 8 / Column 4 → 9 (Hidden Single)
  11. Row 4 / Column 4 → 6 (Naked Single)
  12. Row 3 / Column 4 → 1 (Full House)
  13. Row 9 / Column 5 → 4 (Hidden Single)
  14. Row 9 / Column 2 → 1 (Hidden Single)
  15. Row 8 / Column 5 → 1 (Hidden Single)
  16. Locked Triple: 2,3,9 in r456c8 => r2c8,r45c7<>2, r5c7<>3
  17. Locked Candidates Type 1 (Pointing): 1 in b6 => r2c7<>1
  18. Locked Candidates Type 1 (Pointing): 5 in b6 => r23c7<>5
  19. 2-String Kite: 6 in r2c8,r8c2 (connected by r8c9,r9c8) => r2c2<>6
  20. Empty Rectangle: 6 in b1 (r17c5) => r7c3<>6
  21. Row 7 / Column 3 → 5 (Naked Single)
  22. Row 2 / Column 2 → 5 (Hidden Single)
  23. Row 5 / Column 2 → 2 (Hidden Single)
  24. Row 6 / Column 3 → 9 (Naked Single)
  25. Row 4 / Column 3 → 1 (Naked Single)
  26. Row 5 / Column 1 → 6 (Full House)
  27. Row 1 / Column 1 → 1 (Full House)
  28. Row 4 / Column 7 → 5 (Naked Single)
  29. Row 4 / Column 6 → 9 (Naked Single)
  30. Row 4 / Column 8 → 2 (Full House)
  31. Row 5 / Column 7 → 1 (Naked Single)
  32. Row 6 / Column 8 → 3 (Naked Single)
  33. Row 5 / Column 8 → 9 (Full House)
  34. Row 6 / Column 5 → 2 (Full House)
  35. Row 2 / Column 9 → 1 (Hidden Single)
  36. Give Up: Don't know how to proceed!
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