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.

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)
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