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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Pair, Locked Candidates Type 2 (Claiming), undefined, Continuous Nice Loop techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 7 / Column 6 → 8 (Hidden Single)
  2. Row 9 / Column 3 → 1 (Hidden Single)
  3. Row 9 / Column 8 → 3 (Hidden Single)
  4. Row 3 / Column 8 → 5 (Naked Single)
  5. Row 2 / Column 9 → 2 (Naked Single)
  6. Row 3 / Column 2 → 4 (Naked Single)
  7. Row 3 / Column 7 → 3 (Hidden Single)
  8. Row 5 / Column 4 → 3 (Hidden Single)
  9. Row 7 / Column 8 → 7 (Hidden Single)
  10. Row 5 / Column 6 → 1 (Hidden Single)
  11. Row 3 / Column 6 → 6 (Naked Single)
  12. Row 3 / Column 4 → 1 (Full House)
  13. Row 5 / Column 2 → 5 (Hidden Single)
  14. Row 7 / Column 2 → 2 (Naked Single)
  15. Row 7 / Column 7 → 5 (Naked Single)
  16. Row 8 / Column 9 → 1 (Naked Single)
  17. Row 8 / Column 7 → 2 (Full House)
  18. Row 4 / Column 5 → 6 (Hidden Single)
  19. Row 6 / Column 7 → 1 (Hidden Single)
  20. Locked Pair: 7,9 in r46c1 => r289c1,r46c3<>7, r89c1<>9
  21. Row 9 / Column 1 → 6 (Naked Single)
  22. Row 7 / Column 3 → 4 (Naked Single)
  23. Row 7 / Column 4 → 6 (Full House)
  24. Locked Candidates Type 2 (Claiming): 2 in c5 => r4c46,r6c6<>2
  25. XYZ-Wing: 2/7/9 in r56c5,r6c1 => r6c6<>9
  26. XYZ-Wing: 4/5/7 in r2c56,r6c6 => r1c6<>7
  27. Continuous Nice Loop: 7/8/9 9= r8c2 =8= r1c2 -8- r1c8 -9- r5c8 =9= r5c5 -9- r8c5 =9= r8c2 =8 => r8c2<>7, r1c7<>8, r4c8,r6c5<>9
  28. Row 6 / Column 1 → 9 (Hidden Single)
  29. Row 4 / Column 1 → 7 (Naked Single)
  30. XY-Wing: 4/5/7 in r48c4,r6c6 => r9c6<>7
  31. XY-Chain: 5 5- r2c1 -8- r2c7 -6- r1c7 -9- r1c8 -8- r4c8 -2- r4c3 -3- r4c9 -5- r4c4 -4- r8c4 -7- r8c3 -5 => r12c3,r8c1<>5
  32. Row 8 / Column 1 → 8 (Naked Single)
  33. Row 2 / Column 1 → 5 (Full House)
  34. Row 8 / Column 2 → 9 (Naked Single)
  35. Row 9 / Column 2 → 7 (Naked Single)
  36. Row 1 / Column 2 → 8 (Full House)
  37. Row 8 / Column 3 → 5 (Full House)
  38. Row 9 / Column 4 → 2 (Naked Single)
  39. Row 9 / Column 6 → 9 (Full House)
  40. Row 1 / Column 8 → 9 (Naked Single)
  41. Row 1 / Column 7 → 6 (Naked Single)
  42. Row 2 / Column 7 → 8 (Full House)
  43. Row 4 / Column 7 → 9 (Full House)
  44. Row 5 / Column 8 → 2 (Naked Single)
  45. Row 4 / Column 8 → 8 (Full House)
  46. Row 5 / Column 5 → 9 (Full House)
  47. Row 1 / Column 3 → 7 (Naked Single)
  48. Row 2 / Column 3 → 6 (Full House)
  49. Row 1 / Column 4 → 5 (Naked Single)
  50. Row 1 / Column 6 → 2 (Full House)
  51. Row 4 / Column 4 → 4 (Naked Single)
  52. Row 8 / Column 4 → 7 (Full House)
  53. Row 8 / Column 5 → 4 (Full House)
  54. Row 4 / Column 6 → 5 (Naked Single)
  55. Row 2 / Column 5 → 7 (Naked Single)
  56. Row 2 / Column 6 → 4 (Full House)
  57. Row 6 / Column 6 → 7 (Full House)
  58. Row 6 / Column 5 → 2 (Full House)
  59. Row 4 / Column 9 → 3 (Naked Single)
  60. Row 4 / Column 3 → 2 (Full House)
  61. Row 6 / Column 3 → 3 (Full House)
  62. Row 6 / Column 9 → 5 (Full House)
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