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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Hidden Pair, undefined, Full House 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 2 / Column 1 → 9 (Hidden Single)
  2. Row 2 / Column 9 → 4 (Naked Single)
  3. Row 9 / Column 3 → 9 (Hidden Single)
  4. Row 8 / Column 8 → 9 (Hidden Single)
  5. Row 1 / Column 8 → 5 (Naked Single)
  6. Row 1 / Column 9 → 9 (Naked Single)
  7. Row 3 / Column 9 → 1 (Naked Single)
  8. Row 7 / Column 5 → 1 (Hidden Single)
  9. Row 8 / Column 2 → 1 (Hidden Single)
  10. Row 2 / Column 5 → 3 (Hidden Single)
  11. Row 5 / Column 8 → 1 (Hidden Single)
  12. Row 6 / Column 6 → 1 (Hidden Single)
  13. Row 8 / Column 4 → 3 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 6 in b1 => r45c2<>6
  15. Locked Candidates Type 2 (Claiming): 4 in r8 => r9c56<>4
  16. Locked Candidates Type 2 (Claiming): 5 in r8 => r79c4,r9c56<>5
  17. Locked Candidates Type 2 (Claiming): 5 in c4 => r4c56,r5c5<>5
  18. Naked Pair: 6,7 in r24c6 => r39c6<>7, r9c6<>6
  19. Row 9 / Column 6 → 8 (Naked Single)
  20. Row 7 / Column 9 → 8 (Hidden Single)
  21. Naked Pair: 4,5 in r67c7 => r45c7<>5, r5c7<>4
  22. Locked Candidates Type 1 (Pointing): 4 in b6 => r6c13<>4
  23. Hidden Pair: 7,8 in r6c14 => r6c1<>3, r6c14<>5, r6c4<>6
  24. Row 5 / Column 4 → 5 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 5 in b4 => r4c9<>5
  26. Hidden Pair: 5,7 in r49c2 => r49c2<>2, r9c2<>4
  27. X-Wing: 7 r67 c14 => r49c1,r9c4<>7
  28. W-Wing: 6/7 in r4c6,r9c5 connected by 7 in r49c2 => r45c5<>6
  29. Row 5 / Column 3 → 6 (Hidden Single)
  30. Row 6 / Column 3 → 3 (Naked Single)
  31. Row 4 / Column 6 → 6 (Hidden Single)
  32. Row 2 / Column 6 → 7 (Naked Single)
  33. Row 4 / Column 9 → 3 (Naked Single)
  34. Row 2 / Column 8 → 2 (Naked Single)
  35. Row 2 / Column 2 → 6 (Full House)
  36. Row 3 / Column 8 → 7 (Full House)
  37. Row 3 / Column 1 → 3 (Hidden Single)
  38. Row 9 / Column 8 → 3 (Hidden Single)
  39. Row 9 / Column 1 → 4 (Hidden Single)
  40. Row 7 / Column 3 → 2 (Naked Single)
  41. Row 3 / Column 3 → 4 (Full House)
  42. Row 1 / Column 2 → 8 (Naked Single)
  43. Row 3 / Column 2 → 2 (Full House)
  44. Row 3 / Column 6 → 5 (Naked Single)
  45. Row 3 / Column 5 → 8 (Full House)
  46. Row 8 / Column 6 → 4 (Full House)
  47. Row 8 / Column 5 → 5 (Full House)
  48. Row 1 / Column 4 → 6 (Naked Single)
  49. Row 1 / Column 5 → 4 (Full House)
  50. Row 5 / Column 2 → 4 (Naked Single)
  51. Row 5 / Column 5 → 9 (Naked Single)
  52. Row 7 / Column 4 → 7 (Naked Single)
  53. Row 9 / Column 4 → 2 (Naked Single)
  54. Row 6 / Column 4 → 8 (Full House)
  55. Row 4 / Column 5 → 7 (Full House)
  56. Row 9 / Column 5 → 6 (Full House)
  57. Row 5 / Column 7 → 2 (Naked Single)
  58. Row 5 / Column 1 → 8 (Full House)
  59. Row 7 / Column 1 → 5 (Naked Single)
  60. Row 9 / Column 2 → 7 (Full House)
  61. Row 4 / Column 2 → 5 (Full House)
  62. Row 9 / Column 9 → 5 (Full House)
  63. Row 6 / Column 9 → 6 (Full House)
  64. Row 6 / Column 1 → 7 (Naked Single)
  65. Row 4 / Column 1 → 2 (Full House)
  66. Row 4 / Column 7 → 9 (Full House)
  67. Row 7 / Column 7 → 4 (Naked Single)
  68. Row 6 / Column 7 → 5 (Full House)
  69. Row 6 / Column 8 → 4 (Full House)
  70. Row 7 / Column 8 → 6 (Full House)
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