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

This Sudoku Puzzle has 76 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Empty Rectangle, Discontinuous Nice Loop, Hidden Triple, Locked Candidates Type 2 (Claiming), Hidden Pair, Uniqueness Test 3, undefined, Hidden Rectangle 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 8 / Column 1 → 8 (Naked Single)
  2. Row 7 / Column 1 → 9 (Naked Single)
  3. Row 4 / Column 1 → 5 (Naked Single)
  4. Row 2 / Column 1 → 2 (Naked Single)
  5. Row 5 / Column 1 → 4 (Full House)
  6. Row 5 / Column 2 → 3 (Hidden Single)
  7. Row 7 / Column 8 → 3 (Hidden Single)
  8. Row 9 / Column 2 → 5 (Hidden Single)
  9. Row 1 / Column 2 → 9 (Naked Single)
  10. Row 7 / Column 4 → 8 (Hidden Single)
  11. Row 6 / Column 2 → 2 (Hidden Single)
  12. Row 8 / Column 5 → 3 (Hidden Single)
  13. Row 8 / Column 6 → 2 (Hidden Single)
  14. Row 7 / Column 2 → 6 (Hidden Single)
  15. Locked Candidates Type 1 (Pointing): 8 in b4 => r3c3<>8
  16. Locked Candidates Type 1 (Pointing): 7 in b7 => r3c3<>7
  17. Empty Rectangle: 7 in b8 (r59c8) => r5c5<>7
  18. Discontinuous Nice Loop: 4 r3c5 -4- r7c5 =4= r7c9 =2= r5c9 =5= r2c9 -5- r2c5 =5= r3c5 => r3c5<>4
  19. Discontinuous Nice Loop: 4 r3c6 -4- r3c3 -5- r3c5 =5= r2c5 -5- r2c9 =5= r5c9 =2= r7c9 =4= r7c5 -4- r6c5 =4= r6c6 -4- r3c6 => r3c6<>4
  20. Hidden Triple: 2,3,4 in r1c46,r3c4 => r1c46<>6, r3c4<>1, r3c4<>7
  21. Locked Candidates Type 1 (Pointing): 6 in b2 => r2c89<>6
  22. Discontinuous Nice Loop: 2 r5c8 -2- r5c9 =2= r7c9 =4= r9c9 =9= r9c8 =7= r5c8 => r5c8<>2
  23. Locked Candidates Type 2 (Claiming): 2 in c8 => r13c7<>2
  24. Hidden Pair: 2,5 in r5c79 => r5c79<>1, r5c79<>6, r5c7<>7, r5c79<>9
  25. Locked Candidates Type 1 (Pointing): 1 in b6 => r239c8<>1
  26. Uniqueness Test 3: 1/7 in r7c37,r8c37 => r3c7<>5, r4c7<>6
  27. XY-Chain: 7 7- r4c7 -9- r4c9 -6- r8c9 -1- r8c3 -7 => r8c7<>7
  28. Row 8 / Column 3 → 7 (Hidden Single)
  29. Row 7 / Column 3 → 1 (Full House)
  30. Locked Candidates Type 1 (Pointing): 1 in b8 => r9c9<>1
  31. XY-Chain: 9 9- r4c7 -7- r7c7 -2- r5c7 -5- r1c7 -6- r8c7 -1- r8c9 -6- r4c9 -9 => r4c36,r56c8<>9
  32. Hidden Rectangle: 6/8 in r4c36,r5c36 => r5c6<>6
  33. XY-Chain: 4 4- r7c5 -7- r7c7 -2- r5c7 -5- r1c7 -6- r8c7 -1- r8c9 -6- r4c9 -9- r9c9 -4 => r7c9,r9c46<>4
  34. Row 7 / Column 9 → 2 (Naked Single)
  35. Row 5 / Column 9 → 5 (Naked Single)
  36. Row 7 / Column 7 → 7 (Naked Single)
  37. Row 7 / Column 5 → 4 (Full House)
  38. Row 5 / Column 7 → 2 (Naked Single)
  39. Row 4 / Column 7 → 9 (Naked Single)
  40. Row 9 / Column 8 → 9 (Naked Single)
  41. Row 3 / Column 7 → 1 (Naked Single)
  42. Row 4 / Column 9 → 6 (Naked Single)
  43. Row 2 / Column 8 → 8 (Naked Single)
  44. Row 9 / Column 9 → 4 (Naked Single)
  45. Row 2 / Column 9 → 9 (Naked Single)
  46. Row 8 / Column 9 → 1 (Full House)
  47. Row 8 / Column 7 → 6 (Full House)
  48. Row 1 / Column 7 → 5 (Full House)
  49. Row 4 / Column 3 → 8 (Naked Single)
  50. Row 6 / Column 8 → 1 (Naked Single)
  51. Row 5 / Column 8 → 7 (Full House)
  52. Row 2 / Column 2 → 7 (Naked Single)
  53. Row 3 / Column 2 → 8 (Full House)
  54. Row 3 / Column 8 → 2 (Naked Single)
  55. Row 1 / Column 8 → 6 (Full House)
  56. Row 1 / Column 3 → 4 (Naked Single)
  57. Row 3 / Column 3 → 5 (Full House)
  58. Row 6 / Column 5 → 9 (Naked Single)
  59. Row 3 / Column 4 → 4 (Naked Single)
  60. Row 1 / Column 6 → 3 (Naked Single)
  61. Row 1 / Column 4 → 2 (Full House)
  62. Row 3 / Column 5 → 7 (Naked Single)
  63. Row 3 / Column 6 → 9 (Full House)
  64. Row 5 / Column 5 → 1 (Naked Single)
  65. Row 2 / Column 5 → 5 (Full House)
  66. Row 6 / Column 3 → 6 (Naked Single)
  67. Row 5 / Column 3 → 9 (Full House)
  68. Row 6 / Column 6 → 4 (Full House)
  69. Row 4 / Column 6 → 7 (Naked Single)
  70. Row 4 / Column 4 → 3 (Full House)
  71. Row 5 / Column 4 → 6 (Naked Single)
  72. Row 5 / Column 6 → 8 (Full House)
  73. Row 9 / Column 6 → 1 (Naked Single)
  74. Row 2 / Column 6 → 6 (Full House)
  75. Row 2 / Column 4 → 1 (Full House)
  76. Row 9 / Column 4 → 7 (Full House)
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