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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Uniqueness Test 1, Hidden Rectangle, Finned Swordfish, Sue de Coq, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 6 → 5 (Hidden Single)
  2. Row 8 / Column 3 → 5 (Hidden Single)
  3. Row 8 / Column 7 → 6 (Naked Single)
  4. Row 8 / Column 8 → 7 (Naked Single)
  5. Row 8 / Column 2 → 1 (Naked Single)
  6. Row 8 / Column 4 → 4 (Naked Single)
  7. Row 8 / Column 6 → 8 (Full House)
  8. Row 9 / Column 9 → 3 (Naked Single)
  9. Row 7 / Column 8 → 2 (Naked Single)
  10. Row 9 / Column 7 → 5 (Full House)
  11. Row 3 / Column 9 → 8 (Hidden Single)
  12. Row 4 / Column 9 → 4 (Naked Single)
  13. Row 1 / Column 9 → 7 (Full House)
  14. Row 5 / Column 7 → 8 (Hidden Single)
  15. Row 6 / Column 8 → 5 (Hidden Single)
  16. Row 6 / Column 7 → 3 (Hidden Single)
  17. Row 2 / Column 7 → 9 (Naked Single)
  18. Row 1 / Column 7 → 1 (Full House)
  19. Row 3 / Column 3 → 1 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 6 in b5 => r79c6<>6
  21. Naked Pair: 1,9 in r4c58 => r4c16<>1, r4c136<>9
  22. Row 6 / Column 1 → 1 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 4 in b4 => r13c2<>4
  24. Uniqueness Test 1: 1/9 in r4c58,r5c58 => r5c5<>1, r5c5<>9
  25. Hidden Rectangle: 6/8 in r4c13,r7c13 => r7c3<>6
  26. Finned Swordfish: 9 r367 c246 fr7c1 fr7c3 => r9c2<>9
  27. Sue de Coq: r1c123 - {23469} (r1c5 - {49}, r2c3 - {36}) => r2c1<>6, r3c2<>3, r1c8<>4
  28. Naked Pair: 7,9 in r3c24 => r3c6<>7, r3c6<>9
  29. W-Wing: 9/7 in r3c2,r7c6 connected by 7 in r2c16 => r7c2<>9
  30. Sue de Coq: r456c6 - {124679} (r23c6 - {347}, r4c5,r6c4 - {129}) => r79c6<>7
  31. Row 7 / Column 6 → 9 (Naked Single)
  32. Row 9 / Column 1 → 9 (Hidden Single)
  33. X-Wing: 9 r36 c24 => r15c2<>9
  34. 2-String Kite: 7 in r3c4,r7c1 (connected by r2c1,r3c2) => r7c4<>7
  35. Row 7 / Column 4 → 6 (Naked Single)
  36. Row 9 / Column 2 → 6 (Hidden Single)
  37. Row 5 / Column 2 → 4 (Naked Single)
  38. Row 5 / Column 5 → 7 (Naked Single)
  39. Row 9 / Column 5 → 1 (Naked Single)
  40. Row 4 / Column 5 → 9 (Naked Single)
  41. Row 1 / Column 5 → 4 (Full House)
  42. Row 9 / Column 6 → 2 (Naked Single)
  43. Row 9 / Column 4 → 7 (Full House)
  44. Row 4 / Column 8 → 1 (Naked Single)
  45. Row 5 / Column 8 → 9 (Full House)
  46. Row 6 / Column 4 → 2 (Naked Single)
  47. Row 3 / Column 4 → 9 (Full House)
  48. Row 1 / Column 1 → 6 (Naked Single)
  49. Row 3 / Column 6 → 3 (Naked Single)
  50. Row 2 / Column 6 → 7 (Full House)
  51. Row 4 / Column 6 → 6 (Naked Single)
  52. Row 6 / Column 6 → 4 (Naked Single)
  53. Row 6 / Column 2 → 9 (Full House)
  54. Row 5 / Column 6 → 1 (Full House)
  55. Row 5 / Column 3 → 6 (Full House)
  56. Row 3 / Column 2 → 7 (Naked Single)
  57. Row 3 / Column 8 → 4 (Full House)
  58. Row 1 / Column 8 → 3 (Naked Single)
  59. Row 2 / Column 8 → 6 (Full House)
  60. Row 2 / Column 3 → 3 (Naked Single)
  61. Row 2 / Column 1 → 4 (Full House)
  62. Row 4 / Column 1 → 8 (Naked Single)
  63. Row 4 / Column 3 → 2 (Full House)
  64. Row 7 / Column 1 → 7 (Full House)
  65. Row 7 / Column 2 → 3 (Naked Single)
  66. Row 1 / Column 2 → 2 (Full House)
  67. Row 7 / Column 3 → 8 (Full House)
  68. Row 1 / Column 3 → 9 (Full House)
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