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

This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, undefined, Naked Pair, Empty Rectangle, Naked Single, 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 → 1 (Hidden Single)
  2. Row 8 / Column 5 → 9 (Hidden Single)
  3. Row 8 / Column 7 → 1 (Hidden Single)
  4. Row 1 / Column 5 → 1 (Hidden Single)
  5. Row 8 / Column 9 → 6 (Hidden Single)
  6. Locked Candidates Type 1 (Pointing): 5 in b3 => r45c8<>5
  7. Locked Candidates Type 1 (Pointing): 4 in b9 => r13c8<>4
  8. Locked Candidates Type 2 (Claiming): 5 in r5 => r4c45,r6c5<>5
  9. Row 3 / Column 5 → 5 (Hidden Single)
  10. Row 1 / Column 8 → 5 (Hidden Single)
  11. Locked Candidates Type 2 (Claiming): 2 in c3 => r46c1<>2
  12. Naked Triple: 4,7,8 in r13c6,r2c5 => r123c4<>4, r123c4<>8, r23c4<>7
  13. Naked Triple: 4,7,8 in r4c45,r6c5 => r5c46<>7
  14. Hidden Pair: 2,3 in r7c12 => r7c12<>4, r7c1<>5, r7c2<>8, r7c2<>9
  15. Row 9 / Column 2 → 9 (Hidden Single)
  16. Locked Candidates Type 1 (Pointing): 5 in b7 => r8c4<>5
  17. 2-String Kite: 7 in r2c3,r9c6 (connected by r2c5,r3c6) => r9c3<>7
  18. Locked Candidates Type 1 (Pointing): 7 in b7 => r8c4<>7
  19. Naked Pair: 4,8 in r9c38 => r9c46<>4, r9c46<>8
  20. Empty Rectangle: 7 in b5 (r2c35) => r4c3<>7
  21. W-Wing: 6/3 in r2c4,r5c7 connected by 3 in r1c47 => r2c7<>6
  22. Row 2 / Column 4 → 6 (Hidden Single)
  23. Row 3 / Column 4 → 2 (Naked Single)
  24. Row 1 / Column 4 → 3 (Naked Single)
  25. Row 1 / Column 2 → 2 (Hidden Single)
  26. Row 7 / Column 2 → 3 (Naked Single)
  27. Row 5 / Column 2 → 7 (Naked Single)
  28. Row 7 / Column 1 → 2 (Naked Single)
  29. Row 5 / Column 8 → 6 (Naked Single)
  30. Row 5 / Column 7 → 3 (Naked Single)
  31. Row 4 / Column 1 → 3 (Hidden Single)
  32. Row 4 / Column 8 → 7 (Hidden Single)
  33. Row 6 / Column 5 → 7 (Hidden Single)
  34. Row 3 / Column 7 → 6 (Hidden Single)
  35. Row 2 / Column 9 → 3 (Hidden Single)
  36. Row 9 / Column 4 → 7 (Hidden Single)
  37. Row 9 / Column 6 → 1 (Naked Single)
  38. Row 5 / Column 6 → 5 (Naked Single)
  39. Row 5 / Column 4 → 1 (Full House)
  40. Row 2 / Column 3 → 7 (Hidden Single)
  41. Row 3 / Column 1 → 4 (Naked Single)
  42. Row 3 / Column 2 → 8 (Full House)
  43. Row 8 / Column 2 → 4 (Full House)
  44. Row 6 / Column 1 → 5 (Naked Single)
  45. Row 8 / Column 1 → 7 (Full House)
  46. Row 3 / Column 6 → 7 (Naked Single)
  47. Row 3 / Column 8 → 9 (Full House)
  48. Row 8 / Column 4 → 8 (Naked Single)
  49. Row 8 / Column 3 → 5 (Full House)
  50. Row 9 / Column 3 → 8 (Full House)
  51. Row 9 / Column 8 → 4 (Full House)
  52. Row 7 / Column 8 → 8 (Full House)
  53. Row 7 / Column 9 → 9 (Full House)
  54. Row 6 / Column 9 → 8 (Naked Single)
  55. Row 4 / Column 9 → 5 (Full House)
  56. Row 4 / Column 4 → 4 (Naked Single)
  57. Row 4 / Column 5 → 8 (Full House)
  58. Row 7 / Column 4 → 5 (Full House)
  59. Row 7 / Column 6 → 4 (Full House)
  60. Row 2 / Column 5 → 4 (Full House)
  61. Row 1 / Column 6 → 8 (Full House)
  62. Row 2 / Column 7 → 8 (Full House)
  63. Row 1 / Column 7 → 4 (Full House)
  64. Row 6 / Column 7 → 2 (Naked Single)
  65. Row 4 / Column 7 → 9 (Full House)
  66. Row 4 / Column 3 → 2 (Full House)
  67. Row 6 / Column 3 → 4 (Full House)
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