Soluzione per Sudoku difficile #2169871243518

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

Questo puzzle di sudoku ha 61 passaggi e viene risolto utilizzando tecniche di Hidden Single, Locked Triple, Naked Single, Locked Candidates Type 1 (Pointing), Naked Pair, undefined, Skyscraper, Full House.

Naked Single Spiegazione
Hidden Single Spiegazione
Locked Candidates Spiegazione
Full House Spiegazione
Prova a risolvere

Passaggi della soluzione:

  1. Riga 2 / Colonna 2 → 9 (Hidden Single)
  2. Locked Triple: 7,8,9 in r456c7 => r37c7,r46c8,r5c9<>8, r5c9,r7c7<>7, r46c8<>9
  3. Riga 5 / Colonna 9 → 4 (Naked Single)
  4. Riga 5 / Colonna 3 → 9 (Naked Single)
  5. Locked Candidates Type 1 (Pointing): 2 in b4 => r3c3<>2
  6. Locked Candidates Type 1 (Pointing): 2 in b6 => r78c8<>2
  7. Locked Candidates Type 1 (Pointing): 3 in b6 => r2c8<>3
  8. Naked Pair: 7,8 in r5c17 => r5c46<>7, r5c6<>8
  9. X-Wing: 1 c37 r37 => r3c2568,r7c2458<>1
  10. Skyscraper: 1 in r1c2,r2c5 (connected by r8c25) => r1c46<>1
  11. Riga 1 / Colonna 2 → 1 (Hidden Single)
  12. Riga 3 / Colonna 7 → 1 (Hidden Single)
  13. Riga 7 / Colonna 7 → 5 (Naked Single)
  14. Riga 7 / Colonna 3 → 1 (Hidden Single)
  15. Riga 3 / Colonna 2 → 6 (Hidden Single)
  16. Riga 3 / Colonna 8 → 8 (Naked Single)
  17. Riga 2 / Colonna 8 → 6 (Naked Single)
  18. Riga 2 / Colonna 9 → 3 (Naked Single)
  19. Riga 1 / Colonna 9 → 5 (Full House)
  20. Riga 7 / Colonna 8 → 4 (Naked Single)
  21. Riga 2 / Colonna 1 → 4 (Naked Single)
  22. Riga 2 / Colonna 4 → 1 (Naked Single)
  23. Riga 2 / Colonna 5 → 8 (Full House)
  24. Riga 3 / Colonna 3 → 5 (Naked Single)
  25. Riga 5 / Colonna 4 → 6 (Naked Single)
  26. Riga 3 / Colonna 1 → 2 (Naked Single)
  27. Riga 1 / Colonna 1 → 3 (Full House)
  28. Riga 6 / Colonna 3 → 2 (Naked Single)
  29. Riga 4 / Colonna 3 → 4 (Full House)
  30. Riga 1 / Colonna 4 → 2 (Naked Single)
  31. Riga 1 / Colonna 6 → 6 (Full House)
  32. Riga 5 / Colonna 6 → 1 (Naked Single)
  33. Riga 3 / Colonna 6 → 7 (Naked Single)
  34. Riga 3 / Colonna 5 → 4 (Full House)
  35. Riga 6 / Colonna 8 → 3 (Naked Single)
  36. Riga 7 / Colonna 4 → 7 (Naked Single)
  37. Riga 9 / Colonna 6 → 9 (Naked Single)
  38. Riga 4 / Colonna 8 → 2 (Naked Single)
  39. Riga 6 / Colonna 5 → 7 (Naked Single)
  40. Riga 6 / Colonna 4 → 9 (Naked Single)
  41. Riga 9 / Colonna 4 → 4 (Full House)
  42. Riga 7 / Colonna 2 → 8 (Naked Single)
  43. Riga 7 / Colonna 5 → 6 (Naked Single)
  44. Riga 7 / Colonna 9 → 2 (Full House)
  45. Riga 8 / Colonna 5 → 1 (Naked Single)
  46. Riga 8 / Colonna 6 → 2 (Full House)
  47. Riga 4 / Colonna 6 → 8 (Full House)
  48. Riga 4 / Colonna 5 → 3 (Full House)
  49. Riga 9 / Colonna 8 → 1 (Naked Single)
  50. Riga 8 / Colonna 8 → 9 (Full House)
  51. Riga 6 / Colonna 7 → 8 (Naked Single)
  52. Riga 6 / Colonna 2 → 5 (Full House)
  53. Riga 4 / Colonna 2 → 7 (Naked Single)
  54. Riga 4 / Colonna 7 → 9 (Full House)
  55. Riga 5 / Colonna 7 → 7 (Full House)
  56. Riga 5 / Colonna 1 → 8 (Full House)
  57. Riga 8 / Colonna 2 → 4 (Full House)
  58. Riga 9 / Colonna 1 → 7 (Naked Single)
  59. Riga 8 / Colonna 1 → 5 (Full House)
  60. Riga 8 / Colonna 9 → 7 (Full House)
  61. Riga 9 / Colonna 9 → 8 (Full House)
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