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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Full House, Naked Pair, Naked Triple, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 8 → 4 (Hidden Single)
  2. Row 4 / Column 8 → 1 (Naked Single)
  3. Row 4 / Column 7 → 4 (Naked Single)
  4. Row 2 / Column 4 → 4 (Hidden Single)
  5. Row 9 / Column 1 → 4 (Hidden Single)
  6. Row 8 / Column 8 → 2 (Hidden Single)
  7. Row 3 / Column 9 → 7 (Hidden Single)
  8. Row 8 / Column 1 → 9 (Hidden Single)
  9. Row 3 / Column 5 → 1 (Hidden Single)
  10. Row 8 / Column 2 → 7 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 2 in b1 => r2c5<>2
  12. Row 1 / Column 5 → 2 (Hidden Single)
  13. Row 1 / Column 4 → 3 (Naked Single)
  14. Row 2 / Column 5 → 6 (Full House)
  15. Row 2 / Column 7 → 3 (Hidden Single)
  16. Row 2 / Column 9 → 1 (Hidden Single)
  17. Row 8 / Column 9 → 5 (Naked Single)
  18. Row 1 / Column 9 → 6 (Naked Single)
  19. Row 1 / Column 7 → 5 (Full House)
  20. Row 5 / Column 9 → 9 (Full House)
  21. Row 2 / Column 8 → 9 (Full House)
  22. Row 5 / Column 7 → 6 (Naked Single)
  23. Row 6 / Column 8 → 5 (Full House)
  24. Row 7 / Column 6 → 5 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 3 in b5 => r6c123<>3
  26. Locked Candidates Type 1 (Pointing): 7 in b5 => r79c4<>7
  27. Locked Candidates Type 1 (Pointing): 6 in b7 => r6c2<>6
  28. Naked Pair: 8,9 in r7c47 => r7c2<>8, r7c5<>9
  29. Naked Triple: 1,8,9 in r679c4 => r5c4<>1
  30. XY-Chain: 1 1- r5c6 -4- r5c3 -2- r4c2 -3- r7c2 -6- r9c2 -8- r6c2 -1 => r5c2,r6c46<>1
  31. Row 6 / Column 4 → 9 (Naked Single)
  32. Row 6 / Column 5 → 3 (Naked Single)
  33. Row 7 / Column 4 → 8 (Naked Single)
  34. Row 6 / Column 6 → 4 (Naked Single)
  35. Row 7 / Column 5 → 7 (Naked Single)
  36. Row 9 / Column 5 → 9 (Full House)
  37. Row 7 / Column 7 → 9 (Naked Single)
  38. Row 9 / Column 4 → 1 (Naked Single)
  39. Row 8 / Column 6 → 3 (Full House)
  40. Row 5 / Column 6 → 1 (Full House)
  41. Row 7 / Column 8 → 6 (Naked Single)
  42. Row 7 / Column 2 → 3 (Full House)
  43. Row 9 / Column 8 → 7 (Full House)
  44. Row 9 / Column 7 → 8 (Naked Single)
  45. Row 8 / Column 7 → 1 (Full House)
  46. Row 8 / Column 3 → 8 (Full House)
  47. Row 9 / Column 2 → 6 (Full House)
  48. Row 4 / Column 2 → 2 (Naked Single)
  49. Row 2 / Column 3 → 2 (Naked Single)
  50. Row 6 / Column 3 → 6 (Naked Single)
  51. Row 4 / Column 4 → 7 (Naked Single)
  52. Row 4 / Column 1 → 3 (Full House)
  53. Row 5 / Column 4 → 2 (Full House)
  54. Row 5 / Column 2 → 5 (Naked Single)
  55. Row 5 / Column 3 → 4 (Naked Single)
  56. Row 3 / Column 3 → 3 (Full House)
  57. Row 3 / Column 1 → 6 (Full House)
  58. Row 5 / Column 1 → 7 (Full House)
  59. Row 6 / Column 1 → 8 (Naked Single)
  60. Row 2 / Column 1 → 5 (Full House)
  61. Row 2 / Column 2 → 8 (Full House)
  62. Row 6 / Column 2 → 1 (Full House)
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