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

This Sudoku Puzzle has 72 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, undefined, Turbot Fish, Continuous Nice Loop, Full House, Skyscraper techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 8 → 1 (Naked Single)
  2. Row 4 / Column 6 → 7 (Hidden Single)
  3. Row 1 / Column 3 → 3 (Hidden Single)
  4. Row 1 / Column 6 → 5 (Naked Single)
  5. Row 1 / Column 8 → 9 (Naked Single)
  6. Row 9 / Column 7 → 8 (Hidden Single)
  7. Row 1 / Column 4 → 7 (Hidden Single)
  8. Row 5 / Column 6 → 2 (Hidden Single)
  9. Row 7 / Column 8 → 2 (Hidden Single)
  10. Row 9 / Column 6 → 9 (Hidden Single)
  11. Row 9 / Column 2 → 4 (Hidden Single)
  12. Row 5 / Column 3 → 4 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 1 in b2 => r8c5<>1
  14. Locked Candidates Type 2 (Claiming): 3 in c5 => r6c4<>3
  15. Naked Triple: 1,5,6 in r7c12,r9c1 => r8c13<>1, r8c13<>6
  16. Locked Candidates Type 2 (Claiming): 1 in r8 => r7c9<>1
  17. Hidden Pair: 2,3 in r46c7 => r4c7<>1, r46c7<>5
  18. 2-String Kite: 4 in r2c5,r7c9 (connected by r7c6,r8c5) => r2c9<>4
  19. 2-String Kite: 6 in r5c8,r8c5 (connected by r8c9,r9c8) => r5c5<>6
  20. Turbot Fish: 8 r1c5 =8= r1c2 -8- r5c2 =8= r6c1 => r6c5<>8
  21. W-Wing: 8/5 in r2c9,r5c5 connected by 5 in r25c7 => r2c5<>8
  22. Continuous Nice Loop: 4/6/8 4= r2c5 =1= r1c5 =8= r3c4 -8- r3c9 -4- r7c9 =4= r7c6 -4- r8c5 =4= r2c5 =1 => r8c9<>4, r2c5<>6, r3c12<>8
  23. XY-Chain: 4 4- r2c5 -1- r1c5 -8- r5c5 -5- r5c7 -1- r8c7 -4 => r2c7,r8c5<>4
  24. Row 8 / Column 5 → 6 (Naked Single)
  25. Row 8 / Column 9 → 1 (Naked Single)
  26. Row 9 / Column 4 → 1 (Naked Single)
  27. Row 8 / Column 7 → 4 (Naked Single)
  28. Row 7 / Column 4 → 3 (Naked Single)
  29. Row 7 / Column 6 → 4 (Full House)
  30. Row 3 / Column 7 → 7 (Naked Single)
  31. Row 2 / Column 6 → 6 (Naked Single)
  32. Row 3 / Column 6 → 3 (Full House)
  33. Row 2 / Column 7 → 5 (Naked Single)
  34. Row 3 / Column 4 → 8 (Naked Single)
  35. Row 2 / Column 9 → 8 (Naked Single)
  36. Row 3 / Column 9 → 4 (Full House)
  37. Row 5 / Column 7 → 1 (Naked Single)
  38. Row 1 / Column 5 → 1 (Naked Single)
  39. Row 1 / Column 2 → 8 (Full House)
  40. Row 2 / Column 5 → 4 (Full House)
  41. Row 2 / Column 1 → 7 (Hidden Single)
  42. Row 5 / Column 5 → 8 (Hidden Single)
  43. Row 6 / Column 1 → 8 (Hidden Single)
  44. Locked Candidates Type 2 (Claiming): 6 in c3 => r4c12,r5c2<>6
  45. Skyscraper: 5 in r5c2,r9c1 (connected by r59c8) => r4c1,r7c2<>5
  46. XY-Chain: 1 1- r2c2 -9- r5c2 -5- r5c8 -6- r9c8 -5- r9c1 -6- r7c2 -1 => r4c2<>1
  47. XY-Chain: 9 9- r5c2 -5- r5c8 -6- r9c8 -5- r9c1 -6- r3c1 -2- r8c1 -9 => r4c1<>9
  48. Row 8 / Column 1 → 9 (Hidden Single)
  49. Row 8 / Column 3 → 2 (Full House)
  50. Row 6 / Column 7 → 2 (Hidden Single)
  51. Row 4 / Column 7 → 3 (Full House)
  52. Row 4 / Column 5 → 5 (Naked Single)
  53. Row 6 / Column 5 → 3 (Full House)
  54. Row 5 / Column 2 → 5 (Hidden Single)
  55. Row 5 / Column 8 → 6 (Naked Single)
  56. Row 5 / Column 4 → 9 (Full House)
  57. Row 9 / Column 8 → 5 (Full House)
  58. Row 6 / Column 4 → 6 (Full House)
  59. Row 7 / Column 9 → 6 (Full House)
  60. Row 9 / Column 1 → 6 (Full House)
  61. Row 4 / Column 9 → 9 (Naked Single)
  62. Row 6 / Column 9 → 5 (Full House)
  63. Row 6 / Column 3 → 9 (Full House)
  64. Row 7 / Column 2 → 1 (Naked Single)
  65. Row 7 / Column 1 → 5 (Full House)
  66. Row 3 / Column 1 → 2 (Naked Single)
  67. Row 3 / Column 2 → 6 (Full House)
  68. Row 4 / Column 1 → 1 (Full House)
  69. Row 4 / Column 2 → 2 (Naked Single)
  70. Row 2 / Column 2 → 9 (Full House)
  71. Row 2 / Column 3 → 1 (Full House)
  72. Row 4 / Column 3 → 6 (Full House)
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