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

This Sudoku Puzzle has 82 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Naked Triple, undefined, Discontinuous Nice Loop, Multi Colors 1, Continuous Nice Loop, Naked Pair, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 2 → 8 (Hidden Single)
  2. Row 4 / Column 7 → 8 (Hidden Single)
  3. Row 2 / Column 8 → 4 (Hidden Single)
  4. Row 7 / Column 5 → 4 (Hidden Single)
  5. Row 4 / Column 4 → 4 (Hidden Single)
  6. Row 4 / Column 8 → 6 (Hidden Single)
  7. Row 9 / Column 4 → 3 (Hidden Single)
  8. Row 4 / Column 6 → 3 (Hidden Single)
  9. Row 5 / Column 8 → 9 (Hidden Single)
  10. Row 7 / Column 8 → 3 (Hidden Single)
  11. Row 8 / Column 4 → 1 (Hidden Single)
  12. Row 4 / Column 5 → 9 (Hidden Single)
  13. Row 9 / Column 8 → 1 (Hidden Single)
  14. Row 8 / Column 5 → 6 (Hidden Single)
  15. Row 3 / Column 4 → 6 (Hidden Single)
  16. Row 9 / Column 6 → 9 (Hidden Single)
  17. Row 7 / Column 3 → 1 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 5 in b4 => r5c5<>5
  19. Locked Candidates Type 2 (Claiming): 2 in r4 => r5c123<>2
  20. Locked Candidates Type 2 (Claiming): 7 in r4 => r5c123<>7
  21. Row 5 / Column 1 → 4 (Naked Single)
  22. Row 1 / Column 3 → 4 (Hidden Single)
  23. Row 1 / Column 7 → 3 (Hidden Single)
  24. Naked Triple: 2,7,8 in r79c9,r8c8 => r79c7<>7, r9c7<>2
  25. X-Wing: 8 r28 c36 => r39c3,r7c6<>8
  26. Discontinuous Nice Loop: 2 r1c5 -2- r5c5 -7- r6c4 -5- r1c4 =5= r1c5 => r1c5<>2
  27. Naked Triple: 5,7,9 in r1c45,r2c4 => r2c6,r3c5<>7
  28. XYZ-Wing: 2/7/8 in r13c1,r3c5 => r3c23<>2
  29. Finned X-Wing: 2 c57 r35 fr2c7 => r3c9<>2
  30. Multi Colors 1: 2 (r1c1) / (r1c9), (r2c6,r5c5,r6c8,r9c9) / (r3c5,r6c6,r8c8) => r3c1<>2
  31. Discontinuous Nice Loop: 2 r2c3 -2- r1c1 =2= r1c9 =9= r1c4 -9- r2c4 =9= r2c3 => r2c3<>2
  32. XYZ-Wing: 7/8/9 in r2c34,r3c1 => r2c2<>7
  33. Discontinuous Nice Loop: 8 r7c1 -8- r7c9 -7- r8c8 -2- r6c8 =2= r6c6 -2- r2c6 -8- r2c3 =8= r8c3 -8- r7c1 => r7c1<>8
  34. Row 7 / Column 9 → 8 (Hidden Single)
  35. XY-Chain: 7 7- r5c5 -2- r3c5 -8- r3c1 -7- r7c1 -6- r7c7 -5- r7c6 -7 => r6c6,r9c5<>7
  36. Sashimi X-Wing: 7 c57 r15 fr2c7 fr3c7 => r1c9<>7
  37. XY-Chain: 7 7- r3c1 -8- r3c5 -2- r5c5 -7- r6c4 -5- r6c6 -2- r6c8 -7- r8c8 -2- r9c9 -7 => r3c9,r9c1<>7
  38. Locked Candidates Type 1 (Pointing): 7 in b3 => r5c7<>7
  39. W-Wing: 2/7 in r4c3,r8c8 connected by 7 in r9c39 => r8c3<>2
  40. Continuous Nice Loop: 7 3= r3c2 =1= r2c2 =2= r1c1 -2- r1c9 -9- r3c9 =9= r3c3 =3= r3c2 =1 => r3c23<>7
  41. Naked Triple: 1,3,9 in r3c239 => r3c7<>1
  42. Discontinuous Nice Loop: 7 r8c3 -7- r8c8 -2- r6c8 =2= r6c6 -2- r2c6 -8- r2c3 =8= r8c3 => r8c3<>7
  43. Almost Locked Set XY-Wing: A=r9c157 {2568}, B=r2358c3 {35789}, C=r1c1 {27}, X,Y=2,7, Z=5 => r9c3<>5
  44. Locked Candidates Type 1 (Pointing): 5 in b7 => r8c6<>5
  45. Naked Pair: 2,7 in r9c39 => r9c1<>2
  46. Row 1 / Column 1 → 2 (Hidden Single)
  47. Row 1 / Column 9 → 9 (Naked Single)
  48. Row 2 / Column 2 → 1 (Naked Single)
  49. Row 3 / Column 9 → 1 (Naked Single)
  50. Row 3 / Column 2 → 3 (Naked Single)
  51. Row 3 / Column 3 → 9 (Naked Single)
  52. Row 5 / Column 2 → 5 (Naked Single)
  53. Row 5 / Column 3 → 3 (Naked Single)
  54. Row 2 / Column 4 → 9 (Hidden Single)
  55. Row 5 / Column 7 → 1 (Hidden Single)
  56. Row 8 / Column 3 → 5 (Hidden Single)
  57. Row 8 / Column 6 → 8 (Hidden Single)
  58. Row 2 / Column 6 → 2 (Naked Single)
  59. Row 9 / Column 5 → 5 (Naked Single)
  60. Row 7 / Column 6 → 7 (Full House)
  61. Row 6 / Column 6 → 5 (Full House)
  62. Row 2 / Column 7 → 7 (Naked Single)
  63. Row 2 / Column 3 → 8 (Full House)
  64. Row 3 / Column 7 → 2 (Full House)
  65. Row 3 / Column 1 → 7 (Full House)
  66. Row 3 / Column 5 → 8 (Full House)
  67. Row 1 / Column 5 → 7 (Naked Single)
  68. Row 1 / Column 4 → 5 (Full House)
  69. Row 6 / Column 4 → 7 (Full House)
  70. Row 5 / Column 5 → 2 (Full House)
  71. Row 6 / Column 8 → 2 (Full House)
  72. Row 5 / Column 9 → 7 (Full House)
  73. Row 8 / Column 8 → 7 (Full House)
  74. Row 9 / Column 9 → 2 (Full House)
  75. Row 8 / Column 2 → 2 (Full House)
  76. Row 4 / Column 2 → 7 (Full House)
  77. Row 4 / Column 3 → 2 (Full House)
  78. Row 9 / Column 3 → 7 (Full House)
  79. Row 9 / Column 7 → 6 (Naked Single)
  80. Row 7 / Column 7 → 5 (Full House)
  81. Row 7 / Column 1 → 6 (Full House)
  82. Row 9 / Column 1 → 8 (Full House)
Show More...