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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Locked Pair, Full House, Naked Pair, Remote Pair techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 3 → 4 (Hidden Single)
  2. Row 7 / Column 9 → 5 (Hidden Single)
  3. Row 8 / Column 5 → 4 (Hidden Single)
  4. Row 9 / Column 8 → 8 (Hidden Single)
  5. Row 6 / Column 7 → 3 (Hidden Single)
  6. Row 9 / Column 4 → 6 (Hidden Single)
  7. Row 1 / Column 9 → 4 (Hidden Single)
  8. Row 4 / Column 5 → 6 (Hidden Single)
  9. Row 9 / Column 2 → 4 (Hidden Single)
  10. Row 7 / Column 8 → 4 (Hidden Single)
  11. Row 4 / Column 4 → 8 (Hidden Single)
  12. Locked Candidates Type 1 (Pointing): 5 in b5 => r5c3<>5
  13. Locked Candidates Type 1 (Pointing): 9 in b6 => r4c1<>9
  14. Locked Candidates Type 1 (Pointing): 9 in b8 => r13c6<>9
  15. Locked Candidates Type 2 (Claiming): 3 in r2 => r1c3<>3
  16. Locked Candidates Type 2 (Claiming): 9 in c1 => r78c2,r89c3<>9
  17. Row 9 / Column 3 → 1 (Naked Single)
  18. Locked Pair: 2,7 in r78c2 => r56c2,r8c3<>2, r56c2,r89c1<>7
  19. Row 9 / Column 1 → 9 (Naked Single)
  20. Row 9 / Column 6 → 7 (Full House)
  21. Row 7 / Column 6 → 9 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 1 in b8 => r135c4<>1
  23. Locked Candidates Type 1 (Pointing): 2 in b8 => r35c4<>2
  24. Row 3 / Column 4 → 3 (Naked Single)
  25. Row 1 / Column 8 → 3 (Hidden Single)
  26. Row 5 / Column 6 → 3 (Hidden Single)
  27. Row 5 / Column 4 → 5 (Hidden Single)
  28. Row 1 / Column 4 → 7 (Naked Single)
  29. Row 1 / Column 6 → 5 (Hidden Single)
  30. Naked Pair: 1,7 in r7c7,r8c8 => r8c79<>1, r8c79<>7
  31. Naked Pair: 1,2 in r3c68 => r3c259<>1, r3c59<>2
  32. Row 3 / Column 9 → 6 (Naked Single)
  33. Row 8 / Column 9 → 9 (Naked Single)
  34. Row 8 / Column 7 → 6 (Naked Single)
  35. Row 1 / Column 2 → 6 (Hidden Single)
  36. Row 4 / Column 7 → 9 (Hidden Single)
  37. Row 2 / Column 1 → 1 (Hidden Single)
  38. Row 4 / Column 1 → 7 (Naked Single)
  39. Row 6 / Column 1 → 5 (Naked Single)
  40. Row 8 / Column 1 → 3 (Full House)
  41. Row 8 / Column 3 → 5 (Naked Single)
  42. Row 2 / Column 3 → 3 (Hidden Single)
  43. Locked Candidates Type 2 (Claiming): 1 in c9 => r5c8<>1
  44. Remote Pair: 2/1 r3c8 -1- r3c6 -2- r4c6 -1- r4c9 => r2c9,r5c8<>2
  45. Row 2 / Column 9 → 7 (Naked Single)
  46. Row 5 / Column 8 → 7 (Naked Single)
  47. Row 2 / Column 7 → 8 (Naked Single)
  48. Row 2 / Column 5 → 2 (Full House)
  49. Row 8 / Column 8 → 1 (Naked Single)
  50. Row 3 / Column 8 → 2 (Full House)
  51. Row 1 / Column 7 → 1 (Full House)
  52. Row 7 / Column 7 → 7 (Full House)
  53. Row 3 / Column 6 → 1 (Naked Single)
  54. Row 4 / Column 6 → 2 (Full House)
  55. Row 4 / Column 9 → 1 (Full House)
  56. Row 6 / Column 9 → 2 (Full House)
  57. Row 5 / Column 5 → 1 (Naked Single)
  58. Row 6 / Column 5 → 7 (Full House)
  59. Row 8 / Column 4 → 2 (Naked Single)
  60. Row 7 / Column 4 → 1 (Full House)
  61. Row 7 / Column 2 → 2 (Full House)
  62. Row 8 / Column 2 → 7 (Full House)
  63. Row 6 / Column 3 → 8 (Naked Single)
  64. Row 6 / Column 2 → 1 (Full House)
  65. Row 5 / Column 2 → 9 (Naked Single)
  66. Row 3 / Column 2 → 8 (Full House)
  67. Row 1 / Column 3 → 9 (Full House)
  68. Row 5 / Column 3 → 2 (Full House)
  69. Row 3 / Column 5 → 9 (Full House)
  70. Row 1 / Column 5 → 8 (Full House)
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