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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Locked Pair, Locked Candidates Type 1 (Pointing), Hidden Pair, undefined, Uniqueness Test 3, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 3 → 1 (Hidden Single)
  2. Row 1 / Column 1 → 8 (Hidden Single)
  3. Row 7 / Column 5 → 8 (Hidden Single)
  4. Row 6 / Column 3 → 8 (Hidden Single)
  5. Row 6 / Column 8 → 9 (Naked Single)
  6. Row 4 / Column 8 → 8 (Naked Single)
  7. Row 2 / Column 9 → 8 (Hidden Single)
  8. Row 8 / Column 7 → 8 (Hidden Single)
  9. Locked Pair: 5,7 in r6c45 => r4c4,r5c5,r6c2<>7, r5c5<>5
  10. Locked Pair: 6,7 in r4c79 => r4c26,r5c79<>6, r4c2,r5c79<>7
  11. Row 6 / Column 6 → 6 (Hidden Single)
  12. Row 6 / Column 2 → 3 (Naked Single)
  13. Row 4 / Column 2 → 9 (Naked Single)
  14. Row 4 / Column 4 → 4 (Naked Single)
  15. Row 4 / Column 6 → 3 (Naked Single)
  16. Row 5 / Column 5 → 9 (Naked Single)
  17. Locked Candidates Type 1 (Pointing): 5 in b9 => r9c3<>5
  18. Hidden Pair: 1,5 in r1c5,r2c4 => r1c5,r2c4<>7, r2c4<>2, r2c4<>9
  19. Locked Candidates Type 1 (Pointing): 7 in b2 => r3c1379<>7
  20. X-Wing: 4 c68 r28 => r8c13<>4
  21. Uniqueness Test 3: 2/5 in r5c79,r9c79 => r9c3<>4, r9c3<>9
  22. Row 9 / Column 3 → 2 (Naked Single)
  23. Row 7 / Column 2 → 6 (Naked Single)
  24. Row 5 / Column 2 → 7 (Naked Single)
  25. Row 5 / Column 1 → 4 (Naked Single)
  26. Row 5 / Column 3 → 6 (Full House)
  27. Row 8 / Column 2 → 5 (Naked Single)
  28. Row 2 / Column 2 → 2 (Full House)
  29. Row 8 / Column 1 → 7 (Hidden Single)
  30. Row 8 / Column 3 → 9 (Naked Single)
  31. Row 3 / Column 3 → 3 (Naked Single)
  32. Row 9 / Column 1 → 1 (Naked Single)
  33. Row 3 / Column 1 → 9 (Naked Single)
  34. Row 7 / Column 1 → 3 (Full House)
  35. Row 7 / Column 3 → 4 (Full House)
  36. Row 9 / Column 5 → 4 (Naked Single)
  37. Row 3 / Column 5 → 7 (Naked Single)
  38. Row 8 / Column 6 → 2 (Naked Single)
  39. Row 3 / Column 4 → 2 (Naked Single)
  40. Row 6 / Column 5 → 5 (Naked Single)
  41. Row 1 / Column 5 → 1 (Full House)
  42. Row 6 / Column 4 → 7 (Full House)
  43. Row 1 / Column 6 → 9 (Naked Single)
  44. Row 2 / Column 6 → 4 (Full House)
  45. Row 2 / Column 4 → 5 (Full House)
  46. Row 8 / Column 4 → 1 (Naked Single)
  47. Row 7 / Column 4 → 9 (Full House)
  48. Row 8 / Column 8 → 4 (Full House)
  49. Row 3 / Column 7 → 6 (Naked Single)
  50. Row 3 / Column 9 → 4 (Full House)
  51. Row 1 / Column 8 → 2 (Naked Single)
  52. Row 2 / Column 8 → 1 (Full House)
  53. Row 2 / Column 3 → 7 (Naked Single)
  54. Row 1 / Column 3 → 5 (Full House)
  55. Row 2 / Column 7 → 9 (Full House)
  56. Row 7 / Column 9 → 2 (Naked Single)
  57. Row 7 / Column 7 → 1 (Full House)
  58. Row 4 / Column 7 → 7 (Naked Single)
  59. Row 4 / Column 9 → 6 (Full House)
  60. Row 1 / Column 9 → 7 (Naked Single)
  61. Row 1 / Column 7 → 3 (Full House)
  62. Row 9 / Column 7 → 5 (Naked Single)
  63. Row 5 / Column 7 → 2 (Full House)
  64. Row 5 / Column 9 → 5 (Full House)
  65. Row 9 / Column 9 → 9 (Full House)
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