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.

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...