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.

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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