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

This Sudoku Puzzle has 75 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Hidden Pair, undefined, Uniqueness Test 4, Discontinuous Nice Loop, Locked Candidates Type 2 (Claiming), Simple Colors Trap, Empty Rectangle, Grouped AIC, Naked Single, Full House, Locked Pair techniques.

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

Solution Steps:

  1. Row 5 / Column 2 → 9 (Hidden Single)
  2. Row 7 / Column 1 → 2 (Hidden Single)
  3. Row 8 / Column 5 → 6 (Hidden Single)
  4. Row 9 / Column 8 → 2 (Hidden Single)
  5. Row 7 / Column 6 → 9 (Hidden Single)
  6. Row 5 / Column 9 → 2 (Hidden Single)
  7. Row 6 / Column 9 → 6 (Hidden Single)
  8. Row 5 / Column 1 → 6 (Hidden Single)
  9. Row 4 / Column 9 → 3 (Hidden Single)
  10. Row 8 / Column 9 → 9 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 3 in b4 => r8c3<>3
  12. Row 8 / Column 2 → 3 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 8 in b4 => r12c1<>8
  14. Locked Candidates Type 1 (Pointing): 1 in b7 => r8c78<>1
  15. Row 6 / Column 7 → 1 (Hidden Single)
  16. Row 7 / Column 8 → 1 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 7 in b9 => r8c13<>7
  18. Locked Candidates Type 1 (Pointing): 7 in b7 => r3c2<>7
  19. Locked Candidates Type 1 (Pointing): 7 in b1 => r2c5<>7
  20. Hidden Pair: 2,8 in r2c57 => r2c5<>4, r2c57<>5
  21. W-Wing: 4/7 in r4c3,r8c8 connected by 7 in r5c38 => r8c3<>4
  22. 2-String Kite: 4 in r2c9,r8c1 (connected by r7c9,r8c8) => r2c1<>4
  23. Uniqueness Test 4: 2/8 in r1c57,r2c57 => r1c57<>8
  24. Discontinuous Nice Loop: 4 r2c3 -4- r2c9 -5- r7c9 =5= r8c7 =7= r4c7 -7- r4c3 -4- r2c3 => r2c3<>4
  25. Locked Candidates Type 2 (Claiming): 4 in c3 => r46c1<>4
  26. Simple Colors Trap: 4 (r1c1,r2c9,r8c8) / (r2c6,r7c9,r8c1) => r1c456<>4
  27. Discontinuous Nice Loop: 5 r1c1 -5- r6c1 -8- r4c1 -7- r4c7 =7= r8c7 -7- r8c8 -4- r8c1 =4= r1c1 => r1c1<>5
  28. Empty Rectangle: 5 in b1 (r27c9) => r7c2<>5
  29. Discontinuous Nice Loop: 8 r4c5 -8- r4c1 =8= r6c1 -8- r6c8 -9- r6c5 =9= r4c5 => r4c5<>8
  30. Grouped AIC: 4 4- r2c9 =4= r2c6 =1= r1c46 -1- r1c1 -4- r8c1 =4= r8c8 -4 => r13c8,r7c9<>4
  31. Row 7 / Column 9 → 5 (Naked Single)
  32. Row 2 / Column 9 → 4 (Full House)
  33. Row 8 / Column 7 → 7 (Naked Single)
  34. Row 8 / Column 8 → 4 (Full House)
  35. Row 5 / Column 8 → 7 (Hidden Single)
  36. Row 1 / Column 1 → 4 (Hidden Single)
  37. Row 5 / Column 4 → 8 (Hidden Single)
  38. Locked Pair: 5,8 in r13c2 => r2c13,r9c2<>5
  39. Row 2 / Column 6 → 5 (Hidden Single)
  40. Row 5 / Column 6 → 3 (Naked Single)
  41. Row 5 / Column 3 → 5 (Full House)
  42. Row 6 / Column 1 → 8 (Naked Single)
  43. Row 8 / Column 3 → 1 (Naked Single)
  44. Row 8 / Column 1 → 5 (Full House)
  45. Row 4 / Column 1 → 7 (Naked Single)
  46. Row 2 / Column 1 → 1 (Full House)
  47. Row 6 / Column 8 → 9 (Naked Single)
  48. Row 4 / Column 7 → 8 (Full House)
  49. Row 2 / Column 3 → 7 (Naked Single)
  50. Row 4 / Column 3 → 4 (Naked Single)
  51. Row 4 / Column 5 → 9 (Full House)
  52. Row 6 / Column 3 → 3 (Full House)
  53. Row 2 / Column 7 → 2 (Naked Single)
  54. Row 2 / Column 5 → 8 (Full House)
  55. Row 1 / Column 7 → 5 (Naked Single)
  56. Row 3 / Column 7 → 9 (Full House)
  57. Row 1 / Column 2 → 8 (Naked Single)
  58. Row 3 / Column 2 → 5 (Full House)
  59. Row 1 / Column 8 → 6 (Naked Single)
  60. Row 3 / Column 8 → 8 (Full House)
  61. Row 1 / Column 6 → 1 (Naked Single)
  62. Row 1 / Column 4 → 3 (Naked Single)
  63. Row 1 / Column 5 → 2 (Full House)
  64. Row 9 / Column 6 → 4 (Naked Single)
  65. Row 3 / Column 6 → 6 (Full House)
  66. Row 7 / Column 4 → 7 (Naked Single)
  67. Row 9 / Column 2 → 7 (Naked Single)
  68. Row 7 / Column 2 → 4 (Full House)
  69. Row 7 / Column 5 → 3 (Full House)
  70. Row 3 / Column 4 → 4 (Naked Single)
  71. Row 3 / Column 5 → 7 (Full House)
  72. Row 9 / Column 5 → 5 (Naked Single)
  73. Row 6 / Column 5 → 4 (Full House)
  74. Row 6 / Column 4 → 5 (Full House)
  75. Row 9 / Column 4 → 1 (Full House)
Show More...