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

This Sudoku Puzzle has 93 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Triple, undefined, Discontinuous Nice Loop, Grouped Discontinuous Nice Loop, Continuous Nice Loop, Locked Candidates Type 2 (Claiming), Hidden Pair, Hidden Single, Locked Triple, Hidden Rectangle, Naked Single, AIC, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 7 in b1 => r789c2<>7
  2. Locked Candidates Type 1 (Pointing): 1 in b2 => r1c23<>1
  3. Locked Candidates Type 1 (Pointing): 7 in b3 => r789c8<>7
  4. Locked Candidates Type 1 (Pointing): 6 in b7 => r12c2<>6
  5. Locked Candidates Type 1 (Pointing): 8 in b8 => r1c6<>8
  6. Naked Triple: 1,7,9 in r158c5 => r9c5<>7
  7. 2-String Kite: 8 in r3c1,r4c7 (connected by r4c2,r5c1) => r3c7<>8
  8. Discontinuous Nice Loop: 5 r3c3 -5- r6c3 -2- r6c8 -1- r9c8 =1= r9c2 -1- r3c2 =1= r3c3 => r3c3<>5
  9. Discontinuous Nice Loop: 9 r8c2 -9- r8c5 -7- r5c5 =7= r5c4 =5= r6c4 =4= r6c6 =1= r6c8 -1- r9c8 =1= r9c2 =6= r8c2 => r8c2<>9
  10. Locked Candidates Type 1 (Pointing): 9 in b7 => r7c6<>9
  11. Grouped Discontinuous Nice Loop: 4 r3c1 -4- r79c1 =4= r7c3 =9= r7c2 -9- r4c2 -8- r5c1 =8= r3c1 => r3c1<>4
  12. Locked Candidates Type 1 (Pointing): 4 in b1 => r7c3<>4
  13. Continuous Nice Loop: 1/2/4 4= r3c3 =1= r3c2 -1- r9c2 =1= r9c8 -1- r6c8 =1= r6c6 =4= r6c4 -4- r3c4 =4= r3c3 =1 => r7c28<>1, r3c3<>2, r29c4<>4
  14. Discontinuous Nice Loop: 5 r1c3 -5- r6c3 =5= r6c4 =4= r3c4 -4- r3c3 =4= r2c3 =6= r1c3 => r1c3<>5
  15. Locked Candidates Type 2 (Claiming): 5 in c3 => r5c1<>5
  16. Hidden Pair: 5,7 in r1c28 => r1c28<>2, r1c28<>8, r1c8<>6, r1c8<>9
  17. Row 3 / Column 8 → 9 (Hidden Single)
  18. XY-Wing: 8/9/2 in r47c2,r5c1 => r789c1<>2
  19. Locked Triple: 4,5,7 in r789c1 => r3c1,r89c2<>5
  20. XYZ-Wing: 2/6/8 in r45c7,r5c1 => r5c9<>8
  21. Locked Candidates Type 1 (Pointing): 8 in b6 => r78c7<>8
  22. Hidden Rectangle: 2/8 in r7c68,r8c68 => r8c6<>2
  23. XY-Chain: 2 2- r6c8 -1- r6c6 -4- r6c4 -5- r6c3 -2- r5c1 -8- r4c2 -9- r7c2 -2 => r7c8<>2
  24. Row 7 / Column 8 → 8 (Naked Single)
  25. Row 8 / Column 6 → 8 (Hidden Single)
  26. Row 8 / Column 5 → 9 (Hidden Single)
  27. Row 1 / Column 5 → 1 (Naked Single)
  28. Row 5 / Column 5 → 7 (Naked Single)
  29. Row 9 / Column 4 → 7 (Hidden Single)
  30. Locked Candidates Type 1 (Pointing): 2 in b8 => r1c6<>2
  31. Row 1 / Column 6 → 9 (Naked Single)
  32. Hidden Pair: 5,9 in r5c34 => r5c3<>2
  33. XY-Chain: 6 6- r4c7 -8- r4c2 -9- r7c2 -2- r8c2 -6 => r8c7<>6
  34. Discontinuous Nice Loop: 2 r2c2 -2- r3c1 =2= r5c1 -2- r6c3 =2= r6c8 =1= r9c8 -1- r9c2 =1= r3c2 =5= r1c2 =7= r2c2 => r2c2<>2
  35. Discontinuous Nice Loop: 2 r3c2 -2- r3c1 =2= r5c1 -2- r6c3 =2= r6c8 =1= r9c8 -1- r9c2 =1= r3c2 => r3c2<>2
  36. Locked Candidates Type 2 (Claiming): 2 in c2 => r7c3<>2
  37. Discontinuous Nice Loop: 2 r3c7 -2- r3c1 -8- r2c2 -7- r2c8 =7= r1c8 =5= r3c7 => r3c7<>2
  38. Discontinuous Nice Loop: 8 r3c4 -8- r3c1 -2- r5c1 =2= r6c3 =5= r6c4 =4= r3c4 => r3c4<>8
  39. Discontinuous Nice Loop: 3 r9c6 -3- r4c6 =3= r4c4 =9= r4c2 -9- r7c2 -2- r7c6 =2= r9c6 => r9c6<>3
  40. XY-Wing: 1/4/2 in r6c68,r9c6 => r9c8<>2
  41. AIC: 5/7 5- r1c2 =5= r3c2 =1= r3c3 =4= r3c4 -4- r2c5 -3- r9c5 =3= r9c7 -3- r3c7 -5- r1c8 -7 => r1c8<>5, r1c2<>7
  42. Row 1 / Column 8 → 7 (Naked Single)
  43. Row 1 / Column 2 → 5 (Naked Single)
  44. Row 3 / Column 7 → 5 (Hidden Single)
  45. Row 2 / Column 2 → 7 (Hidden Single)
  46. Locked Candidates Type 1 (Pointing): 8 in b1 => r3c9<>8
  47. Locked Candidates Type 1 (Pointing): 3 in b3 => r7c9<>3
  48. Naked Triple: 1,2,9 in r7c239 => r7c67<>2
  49. Row 9 / Column 6 → 2 (Hidden Single)
  50. W-Wing: 6/2 in r1c3,r2c8 connected by 2 in r6c38 => r1c9,r2c3<>6
  51. Row 1 / Column 3 → 6 (Hidden Single)
  52. W-Wing: 6/3 in r4c6,r9c7 connected by 3 in r7c67 => r4c7<>6
  53. Row 4 / Column 7 → 8 (Naked Single)
  54. Row 4 / Column 2 → 9 (Naked Single)
  55. Row 4 / Column 4 → 3 (Naked Single)
  56. Row 4 / Column 6 → 6 (Full House)
  57. Row 5 / Column 3 → 5 (Naked Single)
  58. Row 7 / Column 2 → 2 (Naked Single)
  59. Row 5 / Column 6 → 1 (Naked Single)
  60. Row 5 / Column 4 → 9 (Naked Single)
  61. Row 6 / Column 3 → 2 (Naked Single)
  62. Row 5 / Column 1 → 8 (Full House)
  63. Row 7 / Column 9 → 1 (Naked Single)
  64. Row 8 / Column 2 → 6 (Naked Single)
  65. Row 6 / Column 6 → 4 (Naked Single)
  66. Row 6 / Column 4 → 5 (Full House)
  67. Row 6 / Column 8 → 1 (Full House)
  68. Row 7 / Column 6 → 3 (Full House)
  69. Row 9 / Column 5 → 4 (Full House)
  70. Row 2 / Column 5 → 3 (Full House)
  71. Row 2 / Column 3 → 4 (Naked Single)
  72. Row 3 / Column 1 → 2 (Naked Single)
  73. Row 7 / Column 3 → 9 (Naked Single)
  74. Row 3 / Column 3 → 1 (Full House)
  75. Row 3 / Column 2 → 8 (Full House)
  76. Row 9 / Column 2 → 1 (Full House)
  77. Row 7 / Column 7 → 7 (Naked Single)
  78. Row 7 / Column 1 → 4 (Full House)
  79. Row 9 / Column 1 → 5 (Naked Single)
  80. Row 8 / Column 1 → 7 (Full House)
  81. Row 3 / Column 4 → 4 (Naked Single)
  82. Row 3 / Column 9 → 3 (Full House)
  83. Row 8 / Column 7 → 2 (Naked Single)
  84. Row 8 / Column 8 → 5 (Full House)
  85. Row 9 / Column 8 → 6 (Naked Single)
  86. Row 2 / Column 8 → 2 (Full House)
  87. Row 9 / Column 7 → 3 (Full House)
  88. Row 5 / Column 7 → 6 (Full House)
  89. Row 5 / Column 9 → 2 (Full House)
  90. Row 1 / Column 9 → 8 (Naked Single)
  91. Row 1 / Column 4 → 2 (Full House)
  92. Row 2 / Column 4 → 8 (Full House)
  93. Row 2 / Column 9 → 6 (Full House)
Show More...