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

This Sudoku Puzzle has 62 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.

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

Solution Steps:

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