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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, undefined, Hidden Rectangle, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 7 → 6 (Naked Single)
  2. Row 5 / Column 3 → 9 (Full House)
  3. Row 8 / Column 5 → 3 (Naked Single)
  4. Row 9 / Column 5 → 6 (Naked Single)
  5. Row 1 / Column 5 → 4 (Naked Single)
  6. Row 2 / Column 5 → 7 (Full House)
  7. Row 1 / Column 3 → 3 (Hidden Single)
  8. Row 7 / Column 3 → 7 (Naked Single)
  9. Row 9 / Column 3 → 5 (Naked Single)
  10. Row 9 / Column 1 → 3 (Naked Single)
  11. Row 7 / Column 1 → 9 (Naked Single)
  12. Row 7 / Column 2 → 1 (Full House)
  13. Row 6 / Column 4 → 3 (Hidden Single)
  14. Row 4 / Column 6 → 4 (Hidden Single)
  15. Row 3 / Column 2 → 4 (Hidden Single)
  16. Row 9 / Column 7 → 4 (Hidden Single)
  17. Row 3 / Column 8 → 9 (Hidden Single)
  18. Row 7 / Column 7 → 3 (Hidden Single)
  19. Row 3 / Column 1 → 7 (Hidden Single)
  20. Row 8 / Column 8 → 5 (Hidden Single)
  21. Row 7 / Column 8 → 6 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 8 in b3 => r3c3<>8
  23. Locked Candidates Type 2 (Claiming): 8 in c8 => r4c7,r6c9<>8
  24. Naked Triple: 2,6,8 in r137c9 => r8c9<>8
  25. 2-String Kite: 5 in r2c1,r6c6 (connected by r4c1,r6c2) => r2c6<>5
  26. XY-Wing: 5/8/6 in r4c14,r6c3 => r4c2,r6c6<>6
  27. Row 6 / Column 6 → 5 (Naked Single)
  28. Row 4 / Column 4 → 6 (Full House)
  29. XY-Wing: 2/7/5 in r14c7,r4c2 => r1c2<>5
  30. Row 1 / Column 7 → 5 (Hidden Single)
  31. Row 3 / Column 4 → 5 (Hidden Single)
  32. X-Wing: 2 r17 c69 => r2c6,r3c9<>2
  33. Hidden Rectangle: 6/9 in r1c26,r2c26 => r1c2<>6
  34. Row 1 / Column 2 → 9 (Naked Single)
  35. Bivalue Universal Grave + 1 => r2c3<>2, r2c3<>8
  36. Row 2 / Column 3 → 6 (Naked Single)
  37. Row 2 / Column 2 → 5 (Naked Single)
  38. Row 2 / Column 6 → 9 (Naked Single)
  39. Row 3 / Column 3 → 2 (Naked Single)
  40. Row 6 / Column 3 → 8 (Full House)
  41. Row 2 / Column 1 → 8 (Full House)
  42. Row 2 / Column 4 → 2 (Full House)
  43. Row 4 / Column 1 → 5 (Full House)
  44. Row 1 / Column 6 → 6 (Full House)
  45. Row 1 / Column 9 → 2 (Full House)
  46. Row 4 / Column 2 → 7 (Naked Single)
  47. Row 6 / Column 2 → 6 (Full House)
  48. Row 8 / Column 6 → 8 (Naked Single)
  49. Row 7 / Column 6 → 2 (Full House)
  50. Row 7 / Column 9 → 8 (Full House)
  51. Row 3 / Column 7 → 8 (Naked Single)
  52. Row 3 / Column 9 → 6 (Full House)
  53. Row 6 / Column 8 → 1 (Naked Single)
  54. Row 6 / Column 9 → 7 (Full House)
  55. Row 8 / Column 9 → 1 (Full House)
  56. Row 9 / Column 4 → 1 (Naked Single)
  57. Row 9 / Column 8 → 2 (Full House)
  58. Row 8 / Column 7 → 7 (Full House)
  59. Row 4 / Column 7 → 2 (Full House)
  60. Row 8 / Column 4 → 9 (Full House)
  61. Row 4 / Column 8 → 8 (Full House)
Show More...