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

This Sudoku Puzzle has 65 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), undefined, Locked Candidates Type 2 (Claiming), Naked Triple, Full House, Uniqueness Test 2 techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 7 / Column 6 → 8 (Naked Single)
  2. Row 1 / Column 1 → 5 (Hidden Single)
  3. Row 9 / Column 5 → 6 (Hidden Single)
  4. Row 8 / Column 3 → 5 (Hidden Single)
  5. Row 1 / Column 5 → 9 (Hidden Single)
  6. Row 1 / Column 7 → 3 (Naked Single)
  7. Row 1 / Column 9 → 7 (Naked Single)
  8. Row 3 / Column 8 → 4 (Naked Single)
  9. Locked Candidates Type 1 (Pointing): 2 in b2 => r4c6<>2
  10. Locked Candidates Type 1 (Pointing): 9 in b3 => r2c123<>9
  11. Locked Candidates Type 1 (Pointing): 2 in b8 => r6c4<>2
  12. X-Wing: 1 r14 c26 => r3c2<>1
  13. W-Wing: 8/7 in r2c3,r5c4 connected by 7 in r2c6,r3c4 => r5c3<>8
  14. W-Wing: 7/9 in r3c2,r9c3 connected by 9 in r5c23 => r23c3<>7
  15. Row 2 / Column 3 → 8 (Naked Single)
  16. W-Wing: 7/1 in r3c4,r4c2 connected by 1 in r1c26 => r3c2<>7
  17. Row 3 / Column 2 → 9 (Naked Single)
  18. Row 5 / Column 3 → 9 (Hidden Single)
  19. Row 9 / Column 3 → 7 (Naked Single)
  20. Row 8 / Column 8 → 7 (Hidden Single)
  21. Locked Candidates Type 2 (Claiming): 9 in r7 => r8c79,r9c9<>9
  22. XY-Wing: 6/8/5 in r48c7,r7c8 => r5c8,r7c7<>5
  23. Row 7 / Column 8 → 5 (Hidden Single)
  24. Locked Candidates Type 2 (Claiming): 6 in c8 => r5c7,r6c9<>6
  25. Naked Triple: 3,6,7 in r5c268 => r5c4<>7
  26. Row 5 / Column 4 → 8 (Naked Single)
  27. Row 6 / Column 4 → 1 (Naked Single)
  28. Row 3 / Column 4 → 7 (Naked Single)
  29. Row 6 / Column 3 → 3 (Naked Single)
  30. Row 3 / Column 3 → 1 (Full House)
  31. Row 3 / Column 1 → 3 (Full House)
  32. Row 2 / Column 6 → 2 (Naked Single)
  33. Row 1 / Column 6 → 1 (Full House)
  34. Row 1 / Column 2 → 2 (Full House)
  35. Row 4 / Column 2 → 1 (Hidden Single)
  36. Uniqueness Test 2: 6/9 in r2c79,r7c79 => r7c2,r9c9<>4
  37. Row 7 / Column 2 → 6 (Naked Single)
  38. Row 5 / Column 2 → 7 (Naked Single)
  39. Row 2 / Column 2 → 4 (Full House)
  40. Row 2 / Column 1 → 7 (Full House)
  41. Row 8 / Column 1 → 9 (Naked Single)
  42. Row 9 / Column 1 → 4 (Full House)
  43. Row 4 / Column 1 → 8 (Naked Single)
  44. Row 6 / Column 1 → 6 (Full House)
  45. Row 5 / Column 6 → 3 (Naked Single)
  46. Row 4 / Column 6 → 7 (Full House)
  47. Row 8 / Column 4 → 2 (Naked Single)
  48. Row 9 / Column 4 → 9 (Full House)
  49. Row 4 / Column 7 → 5 (Naked Single)
  50. Row 6 / Column 8 → 2 (Naked Single)
  51. Row 5 / Column 8 → 6 (Naked Single)
  52. Row 9 / Column 8 → 3 (Full House)
  53. Row 9 / Column 9 → 2 (Full House)
  54. Row 4 / Column 5 → 2 (Naked Single)
  55. Row 4 / Column 9 → 3 (Full House)
  56. Row 5 / Column 7 → 4 (Naked Single)
  57. Row 5 / Column 5 → 5 (Full House)
  58. Row 6 / Column 5 → 4 (Full House)
  59. Row 6 / Column 9 → 8 (Full House)
  60. Row 7 / Column 7 → 9 (Naked Single)
  61. Row 7 / Column 9 → 4 (Full House)
  62. Row 8 / Column 9 → 6 (Naked Single)
  63. Row 2 / Column 9 → 9 (Full House)
  64. Row 2 / Column 7 → 6 (Full House)
  65. Row 8 / Column 7 → 8 (Full House)
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