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

This Sudoku Puzzle has 76 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Hidden Rectangle, Discontinuous Nice Loop, Naked Single, Locked Candidates Type 2 (Claiming), AIC, Grouped Continuous Nice Loop, Naked Triple, Locked Triple, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 7 → 8 (Hidden Single)
  2. Row 8 / Column 6 → 3 (Hidden Single)
  3. Row 3 / Column 8 → 4 (Hidden Single)
  4. Row 8 / Column 5 → 6 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 5 in b1 => r2c5<>5
  6. Locked Candidates Type 1 (Pointing): 7 in b3 => r1c46<>7
  7. Locked Candidates Type 1 (Pointing): 6 in b6 => r2c9<>6
  8. Row 2 / Column 8 → 6 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 2 in b8 => r7c9<>2
  10. Locked Candidates Type 1 (Pointing): 4 in b9 => r46c9<>4
  11. Locked Candidates Type 1 (Pointing): 9 in b9 => r5c8<>9
  12. Hidden Rectangle: 1/2 in r2c79,r8c79 => r8c9<>1
  13. Discontinuous Nice Loop: 1/2/9 r2c3 =5= r2c1 =3= r2c9 =2= r8c9 =8= r8c3 =5= r2c3 => r2c3<>1, r2c3<>2, r2c3<>9
  14. Row 2 / Column 3 → 5 (Naked Single)
  15. Locked Candidates Type 2 (Claiming): 2 in r2 => r1c7<>2
  16. AIC: 4 4- r4c5 =4= r6c5 =8= r6c3 -8- r8c3 =8= r8c9 =2= r8c7 -2- r2c7 -1- r6c7 -4- r5c7 =4= r5c2 -4 => r4c12<>4
  17. Hidden Rectangle: 1/4 in r4c57,r6c57 => r4c5<>1
  18. AIC: 4 4- r4c5 =4= r6c5 =8= r6c3 -8- r8c3 =8= r8c9 =2= r8c7 -2- r2c7 -1- r6c7 -4 => r4c7,r6c5<>4
  19. Row 4 / Column 5 → 4 (Hidden Single)
  20. AIC: 7 7- r1c7 -1- r6c7 -4- r6c1 =4= r7c1 =7= r7c8 -7 => r1c8,r8c7<>7
  21. Row 1 / Column 7 → 7 (Hidden Single)
  22. Grouped Continuous Nice Loop: 1/3 4= r5c2 =8= r79c2 -8- r8c3 =8= r8c9 =2= r8c7 -2- r2c7 -1- r6c7 -4- r6c1 =4= r5c2 =8 => r45c7,r5c2<>1, r5c2<>3
  23. Naked Triple: 1,4,8 in r579c2 => r134c2<>1
  24. Locked Candidates Type 2 (Claiming): 1 in c2 => r78c1,r8c3<>1
  25. Locked Candidates Type 2 (Claiming): 1 in r8 => r7c89,r9c89<>1
  26. Locked Triple: 2,4,8 in r789c9 => r2c9,r8c7<>2
  27. Row 2 / Column 7 → 2 (Hidden Single)
  28. Row 8 / Column 9 → 2 (Hidden Single)
  29. Row 8 / Column 3 → 8 (Hidden Single)
  30. Row 6 / Column 5 → 8 (Hidden Single)
  31. Row 5 / Column 2 → 8 (Hidden Single)
  32. Row 5 / Column 7 → 4 (Hidden Single)
  33. Row 6 / Column 7 → 1 (Naked Single)
  34. Row 6 / Column 3 → 7 (Naked Single)
  35. Row 8 / Column 7 → 5 (Naked Single)
  36. Row 4 / Column 7 → 9 (Full House)
  37. Row 8 / Column 1 → 7 (Naked Single)
  38. Row 8 / Column 8 → 1 (Full House)
  39. Row 9 / Column 8 → 9 (Naked Single)
  40. Row 1 / Column 8 → 3 (Naked Single)
  41. Row 2 / Column 9 → 1 (Full House)
  42. Row 7 / Column 8 → 7 (Naked Single)
  43. Row 5 / Column 8 → 5 (Full House)
  44. Row 2 / Column 5 → 9 (Naked Single)
  45. Row 2 / Column 1 → 3 (Full House)
  46. Row 5 / Column 6 → 1 (Naked Single)
  47. Row 4 / Column 1 → 1 (Naked Single)
  48. Row 6 / Column 1 → 4 (Naked Single)
  49. Row 5 / Column 3 → 9 (Naked Single)
  50. Row 5 / Column 4 → 3 (Full House)
  51. Row 3 / Column 1 → 9 (Naked Single)
  52. Row 7 / Column 1 → 5 (Full House)
  53. Row 4 / Column 3 → 2 (Naked Single)
  54. Row 3 / Column 3 → 1 (Full House)
  55. Row 4 / Column 2 → 3 (Full House)
  56. Row 6 / Column 4 → 6 (Naked Single)
  57. Row 6 / Column 9 → 3 (Full House)
  58. Row 4 / Column 9 → 6 (Full House)
  59. Row 7 / Column 5 → 1 (Naked Single)
  60. Row 1 / Column 5 → 5 (Full House)
  61. Row 7 / Column 2 → 4 (Naked Single)
  62. Row 9 / Column 2 → 1 (Full House)
  63. Row 9 / Column 4 → 5 (Naked Single)
  64. Row 7 / Column 9 → 8 (Naked Single)
  65. Row 9 / Column 9 → 4 (Full House)
  66. Row 9 / Column 6 → 8 (Full House)
  67. Row 4 / Column 4 → 7 (Naked Single)
  68. Row 4 / Column 6 → 5 (Full House)
  69. Row 7 / Column 6 → 2 (Naked Single)
  70. Row 7 / Column 4 → 9 (Full House)
  71. Row 3 / Column 4 → 2 (Naked Single)
  72. Row 1 / Column 4 → 1 (Full House)
  73. Row 1 / Column 6 → 6 (Naked Single)
  74. Row 1 / Column 2 → 2 (Full House)
  75. Row 3 / Column 2 → 6 (Full House)
  76. Row 3 / Column 6 → 7 (Full House)
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