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

This Sudoku Puzzle has 81 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Grouped Discontinuous Nice Loop, Discontinuous Nice Loop, Empty Rectangle, Grouped AIC, Naked Pair, Hidden Triple, Continuous Nice Loop, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 5 → 4 (Hidden Single)
  2. Row 1 / Column 6 → 6 (Hidden Single)
  3. Row 6 / Column 3 → 4 (Hidden Single)
  4. Row 4 / Column 9 → 4 (Hidden Single)
  5. Row 8 / Column 6 → 4 (Hidden Single)
  6. Row 9 / Column 1 → 4 (Hidden Single)
  7. Row 7 / Column 6 → 2 (Hidden Single)
  8. Row 4 / Column 6 → 5 (Hidden Single)
  9. Locked Pair: 3,5 in r8c45 => r79c5,r8c178<>3, r79c5,r8c278<>5
  10. Row 1 / Column 8 → 5 (Hidden Single)
  11. Row 8 / Column 5 → 5 (Hidden Single)
  12. Row 8 / Column 4 → 3 (Naked Single)
  13. Row 3 / Column 4 → 5 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 8 in b8 => r5c5<>8
  15. Locked Candidates Type 1 (Pointing): 9 in b8 => r125c5<>9
  16. Locked Candidates Type 1 (Pointing): 9 in b2 => r2c28<>9
  17. Locked Candidates Type 1 (Pointing): 9 in b1 => r45c1<>9
  18. Locked Candidates Type 2 (Claiming): 9 in c8 => r456c7,r5c9<>9
  19. Locked Candidates Type 2 (Claiming): 7 in c9 => r13c7,r2c8<>7
  20. Finned X-Wing: 3 c68 r26 fr4c8 fr5c8 => r6c7<>3
  21. Grouped Discontinuous Nice Loop: 2 r3c3 -2- r2c23 =2= r2c8 -2- r8c8 -7- r8c7 =7= r4c7 =6= r5c7 -6- r5c3 =6= r3c3 => r3c3<>2
  22. Grouped Discontinuous Nice Loop: 6 r4c1 -6- r8c1 =6= r8c2 =1= r2c2 -1- r2c4 =1= r6c4 -1- r5c5 -3- r5c13 =3= r4c1 => r4c1<>6
  23. Discontinuous Nice Loop: 2 r8c1 -2- r8c8 -7- r8c7 =7= r4c7 =6= r4c2 -6- r8c2 =6= r8c1 => r8c1<>2
  24. Empty Rectangle: 2 in b3 (r35c1) => r5c8<>2
  25. Discontinuous Nice Loop: 3 r5c1 -3- r5c5 -1- r1c5 =1= r1c1 =9= r3c1 =2= r5c1 => r5c1<>3
  26. Grouped AIC: 2/6 2- r5c1 =2= r3c1 -2- r2c23 =2= r2c8 -2- r8c8 -7- r8c7 =7= r4c7 =6= r5c7 -6 => r5c7<>2, r5c1<>6
  27. Almost Locked Set XZ-Rule: A=r4c1 {38}, B=r5c159 {1238}, X=8, Z=3 => r5c3<>3
  28. Row 4 / Column 1 → 3 (Hidden Single)
  29. Discontinuous Nice Loop: 2 r5c9 -2- r5c1 -8- r7c1 -1- r7c9 =1= r5c9 => r5c9<>2
  30. Locked Candidates Type 1 (Pointing): 2 in b6 => r6c2<>2
  31. Naked Pair: 1,3 in r5c59 => r5c7<>1, r5c78<>3
  32. Hidden Triple: 1,2,3 in r5c9,r6c78 => r6c78<>8, r6c8<>9
  33. X-Wing: 3 c68 r26 => r2c5<>3
  34. XYZ-Wing: 1/2/7 in r68c7,r8c8 => r9c7<>2
  35. Continuous Nice Loop: 2/7/8/9 3= r1c5 =1= r1c1 =9= r3c1 -9- r3c7 -2- r6c7 -1- r6c4 =1= r5c5 =3= r1c5 =1 => r8c7<>2, r1c5<>7, r1c1<>8, r3c9<>9
  36. Row 2 / Column 5 → 7 (Hidden Single)
  37. XY-Wing: 1/7/2 in r68c7,r8c8 => r6c8<>2
  38. Row 6 / Column 8 → 3 (Naked Single)
  39. Row 5 / Column 9 → 1 (Naked Single)
  40. Row 6 / Column 6 → 9 (Naked Single)
  41. Row 2 / Column 6 → 3 (Full House)
  42. Row 5 / Column 5 → 3 (Naked Single)
  43. Row 6 / Column 7 → 2 (Naked Single)
  44. Row 4 / Column 4 → 8 (Naked Single)
  45. Row 6 / Column 4 → 1 (Full House)
  46. Row 6 / Column 2 → 8 (Full House)
  47. Row 2 / Column 4 → 9 (Full House)
  48. Row 1 / Column 5 → 1 (Full House)
  49. Row 3 / Column 7 → 9 (Naked Single)
  50. Row 5 / Column 1 → 2 (Naked Single)
  51. Row 1 / Column 1 → 9 (Naked Single)
  52. Row 3 / Column 1 → 6 (Naked Single)
  53. Row 3 / Column 3 → 7 (Naked Single)
  54. Row 3 / Column 9 → 2 (Full House)
  55. Row 8 / Column 1 → 1 (Naked Single)
  56. Row 7 / Column 1 → 8 (Full House)
  57. Row 1 / Column 3 → 8 (Naked Single)
  58. Row 2 / Column 8 → 8 (Naked Single)
  59. Row 8 / Column 7 → 7 (Naked Single)
  60. Row 7 / Column 5 → 9 (Naked Single)
  61. Row 9 / Column 5 → 8 (Full House)
  62. Row 1 / Column 7 → 3 (Naked Single)
  63. Row 1 / Column 9 → 7 (Full House)
  64. Row 2 / Column 3 → 2 (Naked Single)
  65. Row 2 / Column 2 → 1 (Full House)
  66. Row 5 / Column 8 → 9 (Naked Single)
  67. Row 4 / Column 7 → 6 (Naked Single)
  68. Row 8 / Column 8 → 2 (Naked Single)
  69. Row 4 / Column 8 → 7 (Full House)
  70. Row 4 / Column 2 → 9 (Full House)
  71. Row 5 / Column 7 → 8 (Full House)
  72. Row 8 / Column 2 → 6 (Full House)
  73. Row 7 / Column 9 → 3 (Naked Single)
  74. Row 9 / Column 9 → 9 (Full House)
  75. Row 9 / Column 7 → 5 (Naked Single)
  76. Row 7 / Column 7 → 1 (Full House)
  77. Row 7 / Column 3 → 5 (Full House)
  78. Row 5 / Column 2 → 5 (Naked Single)
  79. Row 9 / Column 2 → 2 (Full House)
  80. Row 9 / Column 3 → 3 (Full House)
  81. Row 5 / Column 3 → 6 (Full House)
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