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.

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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