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

This Sudoku Puzzle has 92 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, Finned Swordfish, AIC, Discontinuous Nice Loop, Grouped Continuous Nice Loop, Naked Pair, Uniqueness Test 1, Grouped Discontinuous Nice Loop, Locked Candidates Type 2 (Claiming), undefined, Almost Locked Set Chain, Hidden Rectangle, Continuous Nice Loop, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 6 → 6 (Hidden Single)
  2. Row 2 / Column 7 → 6 (Hidden Single)
  3. Row 7 / Column 5 → 6 (Hidden Single)
  4. Row 8 / Column 3 → 6 (Hidden Single)
  5. Row 1 / Column 1 → 6 (Hidden Single)
  6. Locked Candidates Type 1 (Pointing): 9 in b4 => r3c1<>9
  7. Locked Candidates Type 1 (Pointing): 1 in b8 => r9c79<>1
  8. Naked Triple: 4,5,7 in r7c136 => r7c2<>4, r7c279<>5, r7c9<>7
  9. Row 7 / Column 2 → 3 (Naked Single)
  10. Finned Swordfish: 2 r268 c267 fr6c1 => r4c2<>2
  11. Finned Swordfish: 2 c359 r159 fr4c9 => r5c7<>2
  12. AIC: 2 2- r4c9 =2= r4c1 =9= r4c4 -9- r6c6 =9= r2c6 =2= r2c2 -2- r8c2 =2= r8c7 -2 => r6c7,r9c9<>2
  13. Discontinuous Nice Loop: 1 r5c5 -1- r9c5 -5- r9c7 -2- r8c7 =2= r8c2 -2- r2c2 =2= r2c6 -2- r1c5 =2= r5c5 => r5c5<>1
  14. Row 9 / Column 5 → 1 (Hidden Single)
  15. Discontinuous Nice Loop: 5 r9c1 -5- r9c7 -2- r8c7 =2= r8c2 =8= r9c1 => r9c1<>5
  16. Discontinuous Nice Loop: 7 r9c1 -7- r9c9 -5- r9c7 -2- r8c7 =2= r8c2 =8= r9c1 => r9c1<>7
  17. Grouped Continuous Nice Loop: 1/3/4/5/9 8= r3c7 =4= r3c13 -4- r12c2 =4= r6c2 -4- r5c13 =4= r5c7 =8= r3c7 =4 => r5c7<>1, r35c7<>3, r1c3,r6c1<>4, r35c7<>5, r3c7<>9
  18. Naked Pair: 4,8 in r35c7 => r16c7<>4
  19. Naked Triple: 2,3,5 in r689c7 => r1c7<>3, r1c7<>5
  20. Uniqueness Test 1: 1/9 in r1c79,r7c79 => r1c9<>1, r1c9<>9
  21. Discontinuous Nice Loop: 1 r1c8 -1- r4c8 -5- r6c7 -3- r8c7 =3= r8c8 =7= r1c8 => r1c8<>1
  22. Grouped Discontinuous Nice Loop: 7 r7c6 -7- r8c46 =7= r8c8 =3= r8c7 =2= r8c2 -2- r2c2 =2= r2c6 =4= r7c6 => r7c6<>7
  23. Locked Candidates Type 2 (Claiming): 7 in r7 => r9c3<>7
  24. Grouped Discontinuous Nice Loop: 5 r9c3 -5- r9c7 -2- r8c7 =2= r8c2 -2- r2c2 =2= r2c6 =4= r7c6 =5= r7c13 -5- r9c3 => r9c3<>5
  25. Almost Locked Set XZ-Rule: A=r3c17 {458}, B=r56c7,r6c8 {3458}, X=8, Z=5 => r6c1<>5
  26. Almost Locked Set XY-Wing: A=r6c278 {2345}, B=r2578c6 {24579}, C=r2c2489 {12459}, X,Y=2,9, Z=5 => r6c6<>5
  27. Almost Locked Set XY-Wing: A=r5c13567 {234578}, B=r12379c9 {135789}, C=r3c1357 {34589}, X,Y=3,8, Z=5 => r5c9<>5
  28. Almost Locked Set XY-Wing: A=r5c7 {48}, B=r139c3 {2459}, C=r3c17 {458}, X,Y=5,8, Z=4 => r5c3<>4
  29. Grouped Discontinuous Nice Loop: 4 r7c1 -4- r7c6 =4= r2c6 =2= r2c2 =1= r1c2 -1- r1c7 -9- r1c3 =9= r3c3 =4= r79c3 -4- r7c1 => r7c1<>4
  30. Almost Locked Set Chain: 3- r6c278 {2345} -2- r8c2468 {23578} -3- r1789c7 {12359} -5- r356c7 {3458} -3 => r5c9,r6c4<>3
  31. Locked Candidates Type 2 (Claiming): 3 in c9 => r1c8<>3
  32. Hidden Rectangle: 3/5 in r6c78,r8c78 => r8c8<>5
  33. Discontinuous Nice Loop: 2/4/5 r1c2 =1= r1c7 -1- r7c7 =1= r7c9 -1- r5c9 =1= r5c4 =3= r5c5 =2= r1c5 -2- r2c6 =2= r2c2 =1= r1c2 => r1c2<>2, r1c2<>4, r1c2<>5
  34. Row 1 / Column 2 → 1 (Naked Single)
  35. Row 1 / Column 7 → 9 (Naked Single)
  36. Row 7 / Column 7 → 1 (Naked Single)
  37. Row 7 / Column 9 → 9 (Naked Single)
  38. Row 3 / Column 3 → 9 (Hidden Single)
  39. Locked Candidates Type 2 (Claiming): 4 in c3 => r9c1<>4
  40. XYZ-Wing: 2/3/5 in r1c35,r3c5 => r1c4<>5
  41. Continuous Nice Loop: 1/5/7 7= r1c8 =4= r1c4 =3= r5c4 =1= r5c9 -1- r2c9 -5- r9c9 -7- r1c9 =7= r1c8 =4 => r4c9<>1, r1c8,r34c9,r5c4<>5, r5c4<>7
  42. W-Wing: 2/8 in r4c9,r9c1 connected by 8 in r48c2 => r4c1<>2
  43. Row 4 / Column 9 → 2 (Hidden Single)
  44. Locked Candidates Type 1 (Pointing): 8 in b6 => r5c1<>8
  45. XY-Chain: 5 5- r2c9 -1- r5c9 -8- r3c9 -3- r3c5 -5 => r2c46<>5
  46. Locked Candidates Type 1 (Pointing): 5 in b2 => r5c5<>5
  47. AIC: 9 9- r2c4 -4- r1c4 =4= r1c8 =7= r8c8 =3= r8c7 =2= r8c2 -2- r2c2 =2= r2c6 =9= r6c6 -9 => r2c6,r46c4<>9
  48. Row 2 / Column 4 → 9 (Hidden Single)
  49. Row 6 / Column 6 → 9 (Hidden Single)
  50. Row 4 / Column 1 → 9 (Hidden Single)
  51. Row 4 / Column 2 → 8 (Hidden Single)
  52. Row 9 / Column 1 → 8 (Hidden Single)
  53. Row 8 / Column 4 → 8 (Hidden Single)
  54. Locked Candidates Type 1 (Pointing): 2 in b5 => r5c13<>2
  55. Row 6 / Column 1 → 2 (Hidden Single)
  56. Row 6 / Column 4 → 7 (Hidden Single)
  57. Row 8 / Column 6 → 7 (Hidden Single)
  58. Row 8 / Column 8 → 3 (Naked Single)
  59. Row 9 / Column 9 → 7 (Hidden Single)
  60. Row 1 / Column 8 → 7 (Hidden Single)
  61. Row 6 / Column 7 → 3 (Hidden Single)
  62. Row 1 / Column 4 → 4 (Hidden Single)
  63. Row 2 / Column 6 → 2 (Naked Single)
  64. Row 9 / Column 4 → 5 (Naked Single)
  65. Row 7 / Column 6 → 4 (Full House)
  66. Row 5 / Column 6 → 5 (Full House)
  67. Row 4 / Column 4 → 1 (Naked Single)
  68. Row 4 / Column 8 → 5 (Full House)
  69. Row 5 / Column 4 → 3 (Full House)
  70. Row 5 / Column 5 → 2 (Full House)
  71. Row 9 / Column 7 → 2 (Naked Single)
  72. Row 8 / Column 7 → 5 (Full House)
  73. Row 9 / Column 3 → 4 (Full House)
  74. Row 8 / Column 2 → 2 (Full House)
  75. Row 5 / Column 3 → 7 (Naked Single)
  76. Row 6 / Column 8 → 4 (Naked Single)
  77. Row 2 / Column 8 → 1 (Full House)
  78. Row 6 / Column 2 → 5 (Full House)
  79. Row 5 / Column 1 → 4 (Full House)
  80. Row 2 / Column 2 → 4 (Full House)
  81. Row 2 / Column 9 → 5 (Full House)
  82. Row 7 / Column 3 → 5 (Naked Single)
  83. Row 1 / Column 3 → 2 (Full House)
  84. Row 3 / Column 1 → 5 (Full House)
  85. Row 7 / Column 1 → 7 (Full House)
  86. Row 5 / Column 7 → 8 (Naked Single)
  87. Row 3 / Column 7 → 4 (Full House)
  88. Row 5 / Column 9 → 1 (Full House)
  89. Row 1 / Column 9 → 3 (Naked Single)
  90. Row 1 / Column 5 → 5 (Full House)
  91. Row 3 / Column 5 → 3 (Full House)
  92. Row 3 / Column 9 → 8 (Full House)
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