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

This Sudoku Puzzle has 62 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Uniqueness Test 1, Give Up 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 5 / Column 2 → 1 (Naked Single)
  2. Row 5 / Column 4 → 4 (Naked Single)
  3. Row 7 / Column 2 → 4 (Naked Single)
  4. Row 2 / Column 2 → 9 (Naked Single)
  5. Row 9 / Column 2 → 6 (Naked Single)
  6. Row 1 / Column 1 → 1 (Naked Single)
  7. Row 2 / Column 3 → 4 (Full House)
  8. Row 1 / Column 4 → 8 (Hidden Single)
  9. Row 1 / Column 5 → 6 (Hidden Single)
  10. Row 7 / Column 9 → 7 (Hidden Single)
  11. Row 9 / Column 3 → 1 (Hidden Single)
  12. Row 9 / Column 5 → 4 (Hidden Single)
  13. Row 1 / Column 7 → 9 (Hidden Single)
  14. Row 4 / Column 1 → 9 (Hidden Single)
  15. Locked Candidates Type 1 (Pointing): 3 in b2 => r2c7<>3
  16. Locked Candidates Type 1 (Pointing): 1 in b3 => r46c7<>1
  17. Locked Candidates Type 1 (Pointing): 8 in b6 => r6c3<>8
  18. Locked Candidates Type 1 (Pointing): 2 in b7 => r8c4679<>2
  19. Locked Candidates Type 1 (Pointing): 8 in b7 => r8c67<>8
  20. Locked Candidates Type 2 (Claiming): 2 in c9 => r4c78<>2
  21. Naked Pair: 4,6 in r48c7 => r36c7<>6
  22. Row 3 / Column 8 → 6 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 2 in b3 => r7c7<>2
  24. XY-Wing: 1/2/3 in r2c5,r39c4 => r2c4,r7c5<>3
  25. Row 7 / Column 5 → 1 (Naked Single)
  26. Row 2 / Column 5 → 3 (Full House)
  27. Row 9 / Column 4 → 3 (Hidden Single)
  28. Locked Candidates Type 1 (Pointing): 2 in b8 => r2c6<>2
  29. Uniqueness Test 1: 1/2 in r2c47,r3c47 => r2c4<>1, r2c4<>2
  30. Row 2 / Column 4 → 5 (Naked Single)
  31. Row 2 / Column 6 → 1 (Naked Single)
  32. Row 2 / Column 7 → 2 (Full House)
  33. Row 3 / Column 4 → 2 (Full House)
  34. Row 3 / Column 7 → 1 (Full House)
  35. Row 8 / Column 4 → 9 (Naked Single)
  36. Row 6 / Column 6 → 9 (Naked Single)
  37. Row 8 / Column 6 → 5 (Naked Single)
  38. Uniqueness Test 1: 4/6 in r4c79,r8c79 => r4c9<>4, r4c9<>6
  39. Uniqueness Test 1: 2/8 in r5c13,r8c13 => r5c3<>2, r5c3<>8
  40. Row 5 / Column 3 → 3 (Naked Single)
  41. Row 5 / Column 9 → 2 (Naked Single)
  42. Row 5 / Column 1 → 8 (Full House)
  43. Row 8 / Column 1 → 2 (Full House)
  44. Row 8 / Column 3 → 8 (Full House)
  45. Row 6 / Column 3 → 6 (Naked Single)
  46. Row 4 / Column 3 → 2 (Full House)
  47. Row 4 / Column 9 → 1 (Naked Single)
  48. Row 4 / Column 4 → 7 (Naked Single)
  49. Row 6 / Column 4 → 1 (Full House)
  50. Row 6 / Column 9 → 3 (Naked Single)
  51. Row 4 / Column 2 → 5 (Naked Single)
  52. Row 6 / Column 2 → 7 (Full House)
  53. Row 1 / Column 9 → 4 (Naked Single)
  54. Row 1 / Column 8 → 3 (Full House)
  55. Row 8 / Column 9 → 6 (Full House)
  56. Row 8 / Column 7 → 4 (Full House)
  57. Row 6 / Column 7 → 8 (Naked Single)
  58. Row 6 / Column 8 → 5 (Full House)
  59. Row 4 / Column 8 → 4 (Naked Single)
  60. Row 4 / Column 7 → 6 (Full House)
  61. Row 7 / Column 7 → 3 (Full House)
  62. Give Up: Don't know how to proceed!
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