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

This Sudoku Puzzle has 55 steps and it is solved using Hidden Single, Locked Triple, Naked Single, Full House, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair techniques.

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

Solution Steps:

  1. Row 7 / Column 5 → 9 (Hidden Single)
  2. Locked Triple: 1,2,5 in r789c3 => r16c3,r7c12,r8c12<>1, r1c3,r78c1<>5, r8c1<>2
  3. Row 1 / Column 1 → 5 (Hidden Single)
  4. Row 7 / Column 3 → 5 (Hidden Single)
  5. Row 1 / Column 2 → 6 (Hidden Single)
  6. Row 7 / Column 2 → 3 (Naked Single)
  7. Row 7 / Column 1 → 6 (Naked Single)
  8. Row 7 / Column 4 → 1 (Full House)
  9. Locked Pair: 4,5 in r89c5 => r1c5,r89c4<>4
  10. Row 9 / Column 5 → 4 (Hidden Single)
  11. Row 8 / Column 5 → 5 (Naked Single)
  12. Row 9 / Column 9 → 5 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 8 in b2 => r1c7<>8
  14. Locked Candidates Type 1 (Pointing): 8 in b7 => r8c89<>8
  15. Locked Candidates Type 2 (Claiming): 9 in c7 => r2c8<>9
  16. Locked Candidates Type 2 (Claiming): 8 in c9 => r5c8<>8
  17. Hidden Pair: 2,3 in r45c1 => r45c1<>1, r4c1<>4, r45c1<>7
  18. Row 4 / Column 6 → 4 (Hidden Single)
  19. Row 1 / Column 4 → 4 (Hidden Single)
  20. Row 5 / Column 5 → 1 (Hidden Single)
  21. Row 1 / Column 5 → 8 (Full House)
  22. Row 5 / Column 2 → 9 (Naked Single)
  23. Row 6 / Column 3 → 7 (Naked Single)
  24. Row 1 / Column 3 → 9 (Naked Single)
  25. Row 6 / Column 4 → 8 (Naked Single)
  26. Row 5 / Column 4 → 7 (Full House)
  27. Row 1 / Column 6 → 1 (Naked Single)
  28. Row 1 / Column 7 → 7 (Full House)
  29. Row 3 / Column 6 → 9 (Full House)
  30. Row 5 / Column 8 → 3 (Naked Single)
  31. Row 4 / Column 7 → 1 (Naked Single)
  32. Row 5 / Column 1 → 2 (Naked Single)
  33. Row 5 / Column 9 → 8 (Full House)
  34. Row 3 / Column 7 → 8 (Naked Single)
  35. Row 3 / Column 1 → 1 (Full House)
  36. Row 4 / Column 8 → 7 (Naked Single)
  37. Row 4 / Column 9 → 2 (Naked Single)
  38. Row 6 / Column 9 → 9 (Full House)
  39. Row 4 / Column 1 → 3 (Full House)
  40. Row 8 / Column 9 → 1 (Full House)
  41. Row 2 / Column 7 → 9 (Naked Single)
  42. Row 2 / Column 8 → 1 (Full House)
  43. Row 9 / Column 7 → 3 (Full House)
  44. Row 2 / Column 2 → 8 (Naked Single)
  45. Row 2 / Column 1 → 7 (Full House)
  46. Row 6 / Column 1 → 4 (Naked Single)
  47. Row 6 / Column 2 → 1 (Full House)
  48. Row 8 / Column 2 → 4 (Full House)
  49. Row 8 / Column 1 → 8 (Full House)
  50. Row 8 / Column 3 → 2 (Naked Single)
  51. Row 9 / Column 3 → 1 (Full House)
  52. Row 8 / Column 8 → 9 (Naked Single)
  53. Row 9 / Column 8 → 8 (Full House)
  54. Row 9 / Column 4 → 2 (Full House)
  55. Row 8 / Column 4 → 3 (Full House)
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