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

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

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

Solution Steps:

  1. Row 4 / Column 3 → 4 (Hidden Single)
  2. Row 7 / Column 9 → 5 (Hidden Single)
  3. Row 8 / Column 5 → 4 (Hidden Single)
  4. Row 9 / Column 8 → 8 (Hidden Single)
  5. Row 6 / Column 7 → 3 (Hidden Single)
  6. Row 9 / Column 4 → 6 (Hidden Single)
  7. Row 1 / Column 9 → 4 (Hidden Single)
  8. Row 4 / Column 5 → 6 (Hidden Single)
  9. Row 9 / Column 2 → 4 (Hidden Single)
  10. Row 7 / Column 8 → 4 (Hidden Single)
  11. Row 4 / Column 4 → 8 (Hidden Single)
  12. Locked Candidates Type 1 (Pointing): 5 in b5 => r5c3<>5
  13. Locked Candidates Type 1 (Pointing): 9 in b6 => r4c1<>9
  14. Locked Candidates Type 1 (Pointing): 9 in b8 => r13c6<>9
  15. Locked Candidates Type 2 (Claiming): 3 in r2 => r1c3<>3
  16. Locked Candidates Type 2 (Claiming): 9 in c1 => r78c2,r89c3<>9
  17. Row 9 / Column 3 → 1 (Naked Single)
  18. Locked Pair: 2,7 in r78c2 => r56c2,r8c3<>2, r56c2,r89c1<>7
  19. Row 9 / Column 1 → 9 (Naked Single)
  20. Row 9 / Column 6 → 7 (Full House)
  21. Row 7 / Column 6 → 9 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 1 in b8 => r135c4<>1
  23. Locked Candidates Type 1 (Pointing): 2 in b8 => r35c4<>2
  24. Row 3 / Column 4 → 3 (Naked Single)
  25. Row 1 / Column 8 → 3 (Hidden Single)
  26. Row 5 / Column 6 → 3 (Hidden Single)
  27. Row 5 / Column 4 → 5 (Hidden Single)
  28. Row 1 / Column 4 → 7 (Naked Single)
  29. Row 1 / Column 6 → 5 (Hidden Single)
  30. Naked Pair: 1,7 in r7c7,r8c8 => r8c79<>1, r8c79<>7
  31. Naked Pair: 1,2 in r3c68 => r3c259<>1, r3c59<>2
  32. Row 3 / Column 9 → 6 (Naked Single)
  33. Row 8 / Column 9 → 9 (Naked Single)
  34. Row 8 / Column 7 → 6 (Naked Single)
  35. Row 1 / Column 2 → 6 (Hidden Single)
  36. Row 4 / Column 7 → 9 (Hidden Single)
  37. Row 2 / Column 1 → 1 (Hidden Single)
  38. Row 4 / Column 1 → 7 (Naked Single)
  39. Row 6 / Column 1 → 5 (Naked Single)
  40. Row 8 / Column 1 → 3 (Full House)
  41. Row 8 / Column 3 → 5 (Naked Single)
  42. Row 2 / Column 3 → 3 (Hidden Single)
  43. Locked Candidates Type 2 (Claiming): 1 in c9 => r5c8<>1
  44. Remote Pair: 2/1 r3c8 -1- r3c6 -2- r4c6 -1- r4c9 => r2c9,r5c8<>2
  45. Row 2 / Column 9 → 7 (Naked Single)
  46. Row 5 / Column 8 → 7 (Naked Single)
  47. Row 2 / Column 7 → 8 (Naked Single)
  48. Row 2 / Column 5 → 2 (Full House)
  49. Row 8 / Column 8 → 1 (Naked Single)
  50. Row 3 / Column 8 → 2 (Full House)
  51. Row 1 / Column 7 → 1 (Full House)
  52. Row 7 / Column 7 → 7 (Full House)
  53. Row 3 / Column 6 → 1 (Naked Single)
  54. Row 4 / Column 6 → 2 (Full House)
  55. Row 4 / Column 9 → 1 (Full House)
  56. Row 6 / Column 9 → 2 (Full House)
  57. Row 5 / Column 5 → 1 (Naked Single)
  58. Row 6 / Column 5 → 7 (Full House)
  59. Row 8 / Column 4 → 2 (Naked Single)
  60. Row 7 / Column 4 → 1 (Full House)
  61. Row 7 / Column 2 → 2 (Full House)
  62. Row 8 / Column 2 → 7 (Full House)
  63. Row 6 / Column 3 → 8 (Naked Single)
  64. Row 6 / Column 2 → 1 (Full House)
  65. Row 5 / Column 2 → 9 (Naked Single)
  66. Row 3 / Column 2 → 8 (Full House)
  67. Row 1 / Column 3 → 9 (Full House)
  68. Row 5 / Column 3 → 2 (Full House)
  69. Row 3 / Column 5 → 9 (Full House)
  70. Row 1 / Column 5 → 8 (Full House)
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