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

This Sudoku Puzzle has 64 steps and it is solved using Naked Single, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), undefined, Uniqueness Test 4, Discontinuous Nice Loop, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 4 → 9 (Naked Single)
  2. Row 6 / Column 1 → 4 (Hidden Single)
  3. Row 6 / Column 8 → 7 (Hidden Single)
  4. Row 4 / Column 6 → 1 (Hidden Single)
  5. Row 9 / Column 9 → 5 (Hidden Single)
  6. Row 7 / Column 3 → 2 (Hidden Single)
  7. Row 5 / Column 8 → 1 (Hidden Single)
  8. Row 4 / Column 4 → 5 (Hidden Single)
  9. Row 2 / Column 4 → 4 (Naked Single)
  10. Row 2 / Column 6 → 5 (Hidden Single)
  11. Row 1 / Column 2 → 2 (Hidden Single)
  12. Row 9 / Column 5 → 4 (Hidden Single)
  13. Row 8 / Column 3 → 4 (Hidden Single)
  14. Row 9 / Column 2 → 1 (Hidden Single)
  15. Locked Pair: 3,9 in r46c2 => r28c2,r5c13<>3, r2c2,r5c13<>9
  16. Locked Candidates Type 1 (Pointing): 7 in b2 => r7c5<>7
  17. X-Wing: 6 c28 r28 => r2c137<>6
  18. Uniqueness Test 4: 1/7 in r1c15,r3c15 => r13c1<>7
  19. Locked Candidates Type 1 (Pointing): 7 in b1 => r2c7<>7
  20. XY-Chain: 9 9- r1c8 -3- r8c8 -6- r8c2 -7- r8c6 -2- r6c6 -9- r6c2 -3- r4c2 -9 => r4c8<>9
  21. Locked Candidates Type 1 (Pointing): 9 in b6 => r12c7<>9
  22. Discontinuous Nice Loop: 3/8/9 r2c8 =6= r2c2 =7= r8c2 -7- r8c6 -2- r6c6 -9- r5c5 =9= r5c7 =2= r3c7 =6= r2c8 => r2c8<>3, r2c8<>8, r2c8<>9
  23. Row 2 / Column 8 → 6 (Naked Single)
  24. Row 2 / Column 2 → 7 (Naked Single)
  25. Row 8 / Column 8 → 3 (Naked Single)
  26. Row 8 / Column 2 → 6 (Naked Single)
  27. Row 1 / Column 8 → 9 (Naked Single)
  28. Row 4 / Column 8 → 8 (Full House)
  29. Row 8 / Column 4 → 2 (Naked Single)
  30. Row 8 / Column 6 → 7 (Full House)
  31. Row 9 / Column 6 → 9 (Naked Single)
  32. Row 6 / Column 6 → 2 (Full House)
  33. Row 9 / Column 3 → 3 (Naked Single)
  34. Row 1 / Column 3 → 5 (Naked Single)
  35. Row 9 / Column 1 → 7 (Naked Single)
  36. Row 7 / Column 1 → 9 (Full House)
  37. Row 9 / Column 4 → 8 (Naked Single)
  38. Row 6 / Column 4 → 3 (Full House)
  39. Row 7 / Column 5 → 3 (Full House)
  40. Row 9 / Column 7 → 6 (Full House)
  41. Row 5 / Column 3 → 6 (Naked Single)
  42. Row 2 / Column 1 → 3 (Naked Single)
  43. Row 5 / Column 5 → 9 (Naked Single)
  44. Row 6 / Column 5 → 8 (Full House)
  45. Row 6 / Column 2 → 9 (Full House)
  46. Row 4 / Column 2 → 3 (Full House)
  47. Row 5 / Column 1 → 5 (Full House)
  48. Row 3 / Column 3 → 8 (Naked Single)
  49. Row 2 / Column 3 → 9 (Full House)
  50. Row 2 / Column 7 → 8 (Full House)
  51. Row 1 / Column 1 → 1 (Naked Single)
  52. Row 3 / Column 1 → 6 (Full House)
  53. Row 4 / Column 9 → 4 (Naked Single)
  54. Row 4 / Column 7 → 9 (Full House)
  55. Row 7 / Column 7 → 7 (Naked Single)
  56. Row 7 / Column 9 → 8 (Full House)
  57. Row 1 / Column 5 → 7 (Naked Single)
  58. Row 3 / Column 5 → 1 (Full House)
  59. Row 3 / Column 7 → 2 (Naked Single)
  60. Row 3 / Column 9 → 7 (Full House)
  61. Row 1 / Column 9 → 3 (Naked Single)
  62. Row 1 / Column 7 → 4 (Full House)
  63. Row 5 / Column 7 → 3 (Full House)
  64. Row 5 / Column 9 → 2 (Full House)
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