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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Naked Single, Remote Pair, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 3 → 5 (Hidden Single)
  2. Row 7 / Column 3 → 6 (Hidden Single)
  3. Row 1 / Column 9 → 5 (Hidden Single)
  4. Row 7 / Column 8 → 5 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 3 in b4 => r123c3<>3
  6. Locked Candidates Type 1 (Pointing): 4 in b5 => r4c9<>4
  7. Locked Candidates Type 1 (Pointing): 6 in b6 => r3c9<>6
  8. Locked Candidates Type 1 (Pointing): 4 in b7 => r9c79<>4
  9. Locked Candidates Type 2 (Claiming): 6 in c5 => r1c4,r3c6<>6
  10. Naked Triple: 1,2,3 in r1c134 => r1c5<>1, r1c57<>3, r1c7<>2
  11. Locked Candidates Type 2 (Claiming): 2 in r1 => r2c23,r3c123<>2
  12. Naked Triple: 1,8,9 in r7c156 => r7c7<>8, r7c9<>1, r7c9<>9
  13. Naked Triple: 1,2,8 in r468c2 => r239c2<>1, r39c2<>8, r9c2<>2
  14. Row 9 / Column 2 → 4 (Naked Single)
  15. Naked Triple: 1,6,9 in r678c6 => r23c6<>1, r4c6<>6, r4c6<>9
  16. Row 4 / Column 6 → 4 (Naked Single)
  17. Row 3 / Column 3 → 4 (Hidden Single)
  18. Row 2 / Column 3 → 1 (Naked Single)
  19. Row 1 / Column 3 → 2 (Naked Single)
  20. Row 1 / Column 1 → 3 (Naked Single)
  21. Row 1 / Column 4 → 1 (Naked Single)
  22. Row 3 / Column 1 → 8 (Naked Single)
  23. Row 2 / Column 4 → 4 (Hidden Single)
  24. Row 7 / Column 5 → 8 (Hidden Single)
  25. Row 8 / Column 4 → 3 (Hidden Single)
  26. Row 8 / Column 6 → 6 (Hidden Single)
  27. Locked Candidates Type 2 (Claiming): 8 in r5 => r46c8<>8
  28. Locked Candidates Type 2 (Claiming): 9 in r8 => r9c9<>9
  29. Remote Pair: 1/9 r5c5 -9- r9c5 -1- r7c6 -9- r7c1 => r5c1<>1, r5c1<>9
  30. Row 5 / Column 1 → 2 (Naked Single)
  31. Row 4 / Column 2 → 8 (Naked Single)
  32. Row 4 / Column 4 → 6 (Naked Single)
  33. Row 6 / Column 4 → 8 (Full House)
  34. Row 6 / Column 2 → 1 (Naked Single)
  35. Row 6 / Column 6 → 9 (Naked Single)
  36. Row 5 / Column 5 → 1 (Full House)
  37. Row 8 / Column 2 → 2 (Naked Single)
  38. Row 6 / Column 3 → 3 (Naked Single)
  39. Row 4 / Column 3 → 9 (Full House)
  40. Row 9 / Column 3 → 8 (Full House)
  41. Row 7 / Column 6 → 1 (Naked Single)
  42. Row 9 / Column 5 → 9 (Full House)
  43. Row 8 / Column 7 → 8 (Naked Single)
  44. Row 6 / Column 8 → 7 (Naked Single)
  45. Row 6 / Column 9 → 6 (Full House)
  46. Row 7 / Column 1 → 9 (Naked Single)
  47. Row 9 / Column 1 → 1 (Full House)
  48. Row 5 / Column 7 → 4 (Naked Single)
  49. Row 5 / Column 9 → 9 (Naked Single)
  50. Row 5 / Column 8 → 8 (Full House)
  51. Row 7 / Column 7 → 7 (Naked Single)
  52. Row 7 / Column 9 → 4 (Full House)
  53. Row 8 / Column 9 → 1 (Naked Single)
  54. Row 8 / Column 8 → 9 (Full House)
  55. Row 1 / Column 7 → 6 (Naked Single)
  56. Row 1 / Column 5 → 7 (Full House)
  57. Row 2 / Column 5 → 3 (Naked Single)
  58. Row 3 / Column 5 → 6 (Full House)
  59. Row 2 / Column 8 → 2 (Naked Single)
  60. Row 2 / Column 6 → 5 (Naked Single)
  61. Row 2 / Column 2 → 7 (Full House)
  62. Row 3 / Column 6 → 2 (Full House)
  63. Row 3 / Column 2 → 5 (Full House)
  64. Row 3 / Column 7 → 3 (Naked Single)
  65. Row 9 / Column 7 → 2 (Full House)
  66. Row 9 / Column 9 → 3 (Full House)
  67. Row 4 / Column 8 → 3 (Naked Single)
  68. Row 3 / Column 8 → 1 (Full House)
  69. Row 3 / Column 9 → 7 (Full House)
  70. Row 4 / Column 9 → 2 (Full House)
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