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

This Sudoku Puzzle has 59 steps and it is solved using Locked Candidates Type 1 (Pointing), Grouped AIC, Hidden Single, Discontinuous Nice Loop, Hidden Triple, undefined, Naked Single, AIC, Full House techniques.

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

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 4 in b6 => r78c8<>4
  2. Locked Candidates Type 1 (Pointing): 7 in b6 => r89c8<>7
  3. Grouped AIC: 8 8- r1c9 -9- r1c4 -4- r8c4 -6- r8c13 =6= r9c1 =9= r123c1 -9- r3c3 -8 => r1c123<>8
  4. Row 1 / Column 9 → 8 (Hidden Single)
  5. Discontinuous Nice Loop: 3 r2c3 -3- r2c7 -1- r9c7 =1= r9c8 =6= r9c1 -6- r2c1 =6= r2c3 => r2c3<>3
  6. Hidden Triple: 2,3,4 in r1c23,r2c2 => r1c23,r2c2<>9, r2c2<>5, r2c2<>8
  7. 2-String Kite: 5 in r2c9,r9c2 (connected by r2c1,r3c2) => r9c9<>5
  8. Discontinuous Nice Loop: 8/9 r2c3 =6= r2c1 -6- r9c1 =6= r9c8 =1= r9c7 -1- r2c7 -3- r2c2 -4- r1c2 =4= r1c4 -4- r8c4 -6- r8c3 =6= r2c3 => r2c3<>8, r2c3<>9
  9. Row 2 / Column 3 → 6 (Naked Single)
  10. AIC: 6 6- r7c8 -9- r9c9 -7- r9c6 -2- r9c7 -1- r2c7 -3- r2c2 -4- r1c2 =4= r1c4 -4- r8c4 -6 => r7c5,r8c8<>6
  11. Row 7 / Column 8 → 6 (Hidden Single)
  12. Row 9 / Column 1 → 6 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 9 in b7 => r356c2<>9
  14. Row 5 / Column 3 → 9 (Hidden Single)
  15. Row 3 / Column 3 → 8 (Naked Single)
  16. Row 8 / Column 3 → 2 (Naked Single)
  17. Row 1 / Column 3 → 3 (Full House)
  18. Row 2 / Column 2 → 4 (Naked Single)
  19. Row 1 / Column 2 → 2 (Naked Single)
  20. Row 8 / Column 8 → 3 (Hidden Single)
  21. Row 8 / Column 7 → 8 (Naked Single)
  22. Row 7 / Column 7 → 2 (Naked Single)
  23. Row 8 / Column 1 → 5 (Naked Single)
  24. Row 7 / Column 5 → 4 (Naked Single)
  25. Row 9 / Column 7 → 1 (Naked Single)
  26. Row 2 / Column 7 → 3 (Full House)
  27. Row 9 / Column 2 → 9 (Naked Single)
  28. Row 7 / Column 2 → 8 (Full House)
  29. Row 7 / Column 9 → 9 (Full House)
  30. Row 8 / Column 4 → 6 (Naked Single)
  31. Row 9 / Column 8 → 5 (Naked Single)
  32. Row 9 / Column 9 → 7 (Naked Single)
  33. Row 8 / Column 9 → 4 (Full House)
  34. Row 2 / Column 9 → 5 (Full House)
  35. Row 8 / Column 5 → 7 (Full House)
  36. Row 9 / Column 6 → 2 (Full House)
  37. Row 1 / Column 4 → 4 (Hidden Single)
  38. Row 5 / Column 4 → 3 (Naked Single)
  39. Row 6 / Column 4 → 9 (Full House)
  40. Row 5 / Column 2 → 7 (Naked Single)
  41. Row 6 / Column 5 → 1 (Naked Single)
  42. Row 3 / Column 2 → 5 (Naked Single)
  43. Row 6 / Column 2 → 3 (Full House)
  44. Row 4 / Column 1 → 8 (Full House)
  45. Row 6 / Column 6 → 7 (Full House)
  46. Row 5 / Column 8 → 4 (Naked Single)
  47. Row 4 / Column 8 → 7 (Full House)
  48. Row 3 / Column 5 → 9 (Naked Single)
  49. Row 4 / Column 5 → 2 (Naked Single)
  50. Row 4 / Column 6 → 4 (Full House)
  51. Row 5 / Column 6 → 8 (Naked Single)
  52. Row 2 / Column 6 → 1 (Full House)
  53. Row 2 / Column 5 → 8 (Full House)
  54. Row 5 / Column 5 → 6 (Full House)
  55. Row 2 / Column 1 → 9 (Full House)
  56. Row 3 / Column 8 → 1 (Naked Single)
  57. Row 1 / Column 8 → 9 (Full House)
  58. Row 1 / Column 1 → 1 (Full House)
  59. Row 3 / Column 1 → 7 (Full House)
Show More...