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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, undefined, Naked Single, Full House techniques.

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

Solution Steps:

  1. Row 2 / Column 1 → 2 (Hidden Single)
  2. Locked Candidates Type 1 (Pointing): 5 in b1 => r1c4<>5
  3. Locked Candidates Type 1 (Pointing): 4 in b4 => r7c2<>4
  4. Locked Candidates Type 1 (Pointing): 1 in b5 => r89c4<>1
  5. Locked Candidates Type 1 (Pointing): 2 in b6 => r4c45<>2
  6. Naked Triple: 4,5,7 in r2c46,r3c5 => r1c46<>4, r1c46<>7
  7. Row 1 / Column 9 → 4 (Hidden Single)
  8. Naked Triple: 4,5,7 in r2c467 => r2c3<>7
  9. Naked Triple: 6,7,9 in r5c367 => r5c4<>6, r5c45<>7, r5c45<>9
  10. Hidden Pair: 1,3 in r39c8 => r3c8<>7, r9c8<>2
  11. X-Wing: 6 c37 r57 => r5c6<>6
  12. Row 1 / Column 6 → 6 (Hidden Single)
  13. Row 1 / Column 4 → 9 (Naked Single)
  14. Naked Triple: 4,7,9 in r46c5,r5c6 => r46c4<>4, r46c4<>7
  15. Locked Candidates Type 1 (Pointing): 4 in b5 => r7c5<>4
  16. Row 7 / Column 3 → 4 (Hidden Single)
  17. Row 8 / Column 3 → 8 (Naked Single)
  18. Row 2 / Column 3 → 3 (Naked Single)
  19. Row 7 / Column 2 → 2 (Naked Single)
  20. Row 8 / Column 9 → 2 (Naked Single)
  21. Row 2 / Column 9 → 8 (Naked Single)
  22. Row 3 / Column 3 → 7 (Naked Single)
  23. Row 5 / Column 3 → 6 (Full House)
  24. Row 7 / Column 5 → 9 (Naked Single)
  25. Row 9 / Column 2 → 5 (Naked Single)
  26. Row 9 / Column 1 → 6 (Full House)
  27. Row 4 / Column 9 → 6 (Naked Single)
  28. Row 9 / Column 9 → 3 (Full House)
  29. Row 8 / Column 4 → 4 (Naked Single)
  30. Row 1 / Column 8 → 7 (Naked Single)
  31. Row 1 / Column 1 → 5 (Naked Single)
  32. Row 1 / Column 2 → 8 (Full House)
  33. Row 3 / Column 5 → 5 (Naked Single)
  34. Row 7 / Column 7 → 6 (Naked Single)
  35. Row 7 / Column 8 → 8 (Full House)
  36. Row 4 / Column 4 → 1 (Naked Single)
  37. Row 9 / Column 8 → 1 (Naked Single)
  38. Row 8 / Column 7 → 9 (Full House)
  39. Row 8 / Column 6 → 1 (Full House)
  40. Row 2 / Column 7 → 5 (Naked Single)
  41. Row 6 / Column 8 → 9 (Naked Single)
  42. Row 2 / Column 4 → 7 (Naked Single)
  43. Row 2 / Column 6 → 4 (Full House)
  44. Row 3 / Column 7 → 1 (Naked Single)
  45. Row 3 / Column 8 → 3 (Full House)
  46. Row 5 / Column 7 → 7 (Full House)
  47. Row 4 / Column 8 → 2 (Full House)
  48. Row 5 / Column 5 → 2 (Naked Single)
  49. Row 4 / Column 2 → 4 (Naked Single)
  50. Row 6 / Column 2 → 1 (Full House)
  51. Row 6 / Column 4 → 6 (Naked Single)
  52. Row 9 / Column 6 → 7 (Naked Single)
  53. Row 9 / Column 4 → 2 (Full House)
  54. Row 5 / Column 6 → 9 (Full House)
  55. Row 5 / Column 4 → 5 (Full House)
  56. Row 6 / Column 1 → 7 (Naked Single)
  57. Row 4 / Column 1 → 9 (Full House)
  58. Row 4 / Column 5 → 7 (Full House)
  59. Row 6 / Column 5 → 4 (Full House)
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