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

This Sudoku Puzzle has 85 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Pair, undefined, Discontinuous Nice Loop, Naked Pair, Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Rectangle, Grouped AIC, Naked Single, Full House, Hidden Single, AIC techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 1 in b1 => r7c3<>1
  2. Locked Candidates Type 1 (Pointing): 3 in b2 => r1c8<>3
  3. Locked Candidates Type 1 (Pointing): 6 in b2 => r45c4<>6
  4. Locked Candidates Type 1 (Pointing): 7 in b2 => r9c4<>7
  5. Locked Candidates Type 1 (Pointing): 1 in b3 => r7c9<>1
  6. Locked Candidates Type 1 (Pointing): 3 in b4 => r7c3<>3
  7. Locked Candidates Type 1 (Pointing): 2 in b8 => r9c8<>2
  8. Hidden Pair: 6,7 in r23c4 => r23c4<>4, r23c4<>8, r3c4<>5
  9. Locked Candidates Type 1 (Pointing): 5 in b2 => r1c23<>5
  10. Hidden Pair: 6,9 in r45c6 => r4c6<>8, r5c6<>3, r5c6<>4
  11. 2-String Kite: 5 in r6c3,r7c9 (connected by r5c9,r6c8) => r7c3<>5
  12. Discontinuous Nice Loop: 6 r3c2 -6- r3c4 -7- r3c9 -2- r3c1 =2= r5c1 -2- r4c2 -6- r3c2 => r3c2<>6
  13. Discontinuous Nice Loop: 5 r5c1 -5- r5c9 -9- r5c6 -6- r4c6 =6= r4c2 =2= r5c1 => r5c1<>5
  14. Locked Candidates Type 1 (Pointing): 5 in b4 => r3c3<>5
  15. Naked Pair: 2,6 in r4c2,r5c1 => r5c3<>6
  16. Locked Candidates Type 2 (Claiming): 6 in c3 => r2c2,r3c1<>6
  17. Naked Triple: 4,8,9 in r2c258 => r2c3<>4, r2c3<>8, r2c9<>9
  18. Discontinuous Nice Loop: 6 r9c2 -6- r9c8 =6= r8c8 =9= r8c7 -9- r4c7 =9= r4c6 =6= r4c2 -6- r9c2 => r9c2<>6
  19. Discontinuous Nice Loop: 8 r9c5 -8- r2c5 =8= r2c8 -8- r6c8 =8= r4c7 -8- r4c4 -2- r9c4 =2= r9c5 => r9c5<>8
  20. Locked Candidates Type 2 (Claiming): 8 in c5 => r1c46<>8
  21. Hidden Rectangle: 1/2 in r5c45,r9c45 => r5c4<>2
  22. Grouped AIC: 2 2- r1c2 =2= r1c89 -2- r3c9 -7- r2c9 -1- r2c3 =1= r1c3 =8= r3c13 -8- r3c7 =8= r4c7 -8- r4c4 -2- r4c2 =2= r5c1 -2 => r3c1,r4c2<>2
  23. Row 4 / Column 2 → 6 (Naked Single)
  24. Row 4 / Column 6 → 9 (Naked Single)
  25. Row 5 / Column 1 → 2 (Naked Single)
  26. Row 4 / Column 7 → 8 (Naked Single)
  27. Row 4 / Column 4 → 2 (Full House)
  28. Row 5 / Column 6 → 6 (Naked Single)
  29. Row 9 / Column 5 → 2 (Hidden Single)
  30. AIC: 2/3 3- r3c8 =3= r3c7 =4= r5c7 =9= r5c9 =5= r7c9 =2= r7c8 -2 => r3c8<>2, r7c8<>3
  31. Discontinuous Nice Loop: 1 r8c1 -1- r8c5 =1= r5c5 -1- r5c4 -4- r5c7 -9- r8c7 =9= r8c8 =6= r8c1 => r8c1<>1
  32. Hidden Rectangle: 5/6 in r8c18,r9c18 => r9c8<>5
  33. Discontinuous Nice Loop: 8 r3c8 -8- r3c1 -5- r8c1 -6- r8c8 =6= r9c8 =3= r3c8 => r3c8<>8
  34. Locked Candidates Type 2 (Claiming): 8 in r3 => r1c3<>8
  35. Hidden Rectangle: 4/8 in r1c58,r2c58 => r1c8<>4
  36. AIC: 2/5 2- r7c8 =2= r1c8 =8= r1c5 =3= r5c5 -3- r5c3 -5- r5c9 =5= r7c9 -5 => r7c9<>2, r7c8<>5
  37. Row 7 / Column 8 → 2 (Naked Single)
  38. Discontinuous Nice Loop: 4/5 r1c6 =3= r1c5 -3- r5c5 =3= r5c3 =5= r5c9 =9= r5c7 -9- r8c7 =9= r8c8 =5= r6c8 -5- r6c3 -3- r6c6 =3= r1c6 => r1c6<>4, r1c6<>5
  39. Row 1 / Column 6 → 3 (Naked Single)
  40. Row 1 / Column 4 → 5 (Hidden Single)
  41. Row 5 / Column 5 → 3 (Hidden Single)
  42. Row 5 / Column 3 → 5 (Naked Single)
  43. Row 6 / Column 3 → 3 (Full House)
  44. Row 5 / Column 9 → 9 (Naked Single)
  45. Row 5 / Column 7 → 4 (Naked Single)
  46. Row 5 / Column 4 → 1 (Full House)
  47. Row 6 / Column 8 → 5 (Full House)
  48. Row 9 / Column 4 → 8 (Naked Single)
  49. Row 6 / Column 4 → 4 (Naked Single)
  50. Row 6 / Column 6 → 8 (Full House)
  51. Row 8 / Column 5 → 1 (Hidden Single)
  52. Row 7 / Column 9 → 5 (Hidden Single)
  53. Row 8 / Column 7 → 9 (Hidden Single)
  54. Row 8 / Column 8 → 6 (Naked Single)
  55. Row 8 / Column 1 → 5 (Naked Single)
  56. Row 9 / Column 8 → 3 (Naked Single)
  57. Row 3 / Column 1 → 8 (Naked Single)
  58. Row 3 / Column 8 → 4 (Naked Single)
  59. Row 9 / Column 2 → 7 (Naked Single)
  60. Row 7 / Column 1 → 1 (Naked Single)
  61. Row 9 / Column 1 → 6 (Full House)
  62. Row 3 / Column 3 → 6 (Naked Single)
  63. Row 8 / Column 2 → 4 (Naked Single)
  64. Row 8 / Column 6 → 7 (Full House)
  65. Row 9 / Column 6 → 5 (Naked Single)
  66. Row 9 / Column 7 → 1 (Full House)
  67. Row 7 / Column 7 → 7 (Full House)
  68. Row 7 / Column 6 → 4 (Full House)
  69. Row 3 / Column 7 → 3 (Full House)
  70. Row 2 / Column 3 → 1 (Naked Single)
  71. Row 3 / Column 4 → 7 (Naked Single)
  72. Row 2 / Column 4 → 6 (Full House)
  73. Row 2 / Column 2 → 9 (Naked Single)
  74. Row 7 / Column 2 → 3 (Naked Single)
  75. Row 7 / Column 3 → 8 (Full House)
  76. Row 1 / Column 3 → 4 (Full House)
  77. Row 2 / Column 9 → 7 (Naked Single)
  78. Row 3 / Column 9 → 2 (Naked Single)
  79. Row 1 / Column 9 → 1 (Full House)
  80. Row 3 / Column 2 → 5 (Full House)
  81. Row 1 / Column 2 → 2 (Full House)
  82. Row 2 / Column 8 → 8 (Naked Single)
  83. Row 1 / Column 8 → 9 (Full House)
  84. Row 1 / Column 5 → 8 (Full House)
  85. Row 2 / Column 5 → 4 (Full House)
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