Soluzione per Sudoku difficile #4121786549318

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

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 8 / Colonna 2 → 1 (Hidden Single)
  2. Locked Triple: 1,7,8 in r456c7 => r37c7,r46c8,r5c9<>7, r3c7,r5c9<>8, r46c8<>1
  3. Riga 5 / Colonna 9 → 4 (Naked Single)
  4. Riga 5 / Colonna 3 → 1 (Naked Single)
  5. Locked Candidates Type 1 (Pointing): 5 in b4 => r7c3<>5
  6. Locked Candidates Type 1 (Pointing): 5 in b6 => r23c8<>5
  7. Locked Candidates Type 1 (Pointing): 9 in b6 => r8c8<>9
  8. Naked Pair: 7,8 in r5c17 => r5c46<>8, r5c6<>7
  9. X-Wing: 6 c37 r37 => r3c2458,r7c2568<>6
  10. Skyscraper: 6 in r8c5,r9c2 (connected by r2c25) => r9c46<>6
  11. Riga 9 / Colonna 2 → 6 (Hidden Single)
  12. Riga 3 / Colonna 3 → 6 (Hidden Single)
  13. Riga 3 / Colonna 7 → 3 (Naked Single)
  14. Riga 7 / Colonna 7 → 6 (Naked Single)
  15. Riga 7 / Colonna 2 → 2 (Hidden Single)
  16. Riga 7 / Colonna 8 → 7 (Naked Single)
  17. Riga 3 / Colonna 8 → 4 (Naked Single)
  18. Riga 8 / Colonna 8 → 2 (Naked Single)
  19. Riga 8 / Colonna 9 → 9 (Naked Single)
  20. Riga 9 / Colonna 9 → 3 (Full House)
  21. Riga 8 / Colonna 1 → 4 (Naked Single)
  22. Riga 7 / Colonna 3 → 3 (Naked Single)
  23. Riga 8 / Colonna 4 → 6 (Naked Single)
  24. Riga 8 / Colonna 5 → 7 (Full House)
  25. Riga 4 / Colonna 3 → 5 (Naked Single)
  26. Riga 6 / Colonna 3 → 4 (Full House)
  27. Riga 7 / Colonna 1 → 5 (Naked Single)
  28. Riga 9 / Colonna 1 → 9 (Full House)
  29. Riga 5 / Colonna 4 → 2 (Naked Single)
  30. Riga 4 / Colonna 8 → 9 (Naked Single)
  31. Riga 7 / Colonna 6 → 8 (Naked Single)
  32. Riga 7 / Colonna 5 → 4 (Full House)
  33. Riga 5 / Colonna 6 → 6 (Naked Single)
  34. Riga 9 / Colonna 4 → 5 (Naked Single)
  35. Riga 9 / Colonna 6 → 2 (Full House)
  36. Riga 4 / Colonna 5 → 8 (Naked Single)
  37. Riga 6 / Colonna 8 → 5 (Naked Single)
  38. Riga 1 / Colonna 6 → 1 (Naked Single)
  39. Riga 3 / Colonna 4 → 8 (Naked Single)
  40. Riga 2 / Colonna 5 → 6 (Naked Single)
  41. Riga 3 / Colonna 5 → 2 (Naked Single)
  42. Riga 6 / Colonna 5 → 9 (Full House)
  43. Riga 4 / Colonna 4 → 1 (Naked Single)
  44. Riga 6 / Colonna 6 → 7 (Full House)
  45. Riga 2 / Colonna 6 → 5 (Full House)
  46. Riga 1 / Colonna 4 → 4 (Full House)
  47. Riga 1 / Colonna 8 → 6 (Naked Single)
  48. Riga 2 / Colonna 8 → 1 (Full House)
  49. Riga 3 / Colonna 2 → 7 (Naked Single)
  50. Riga 3 / Colonna 9 → 5 (Full House)
  51. Riga 4 / Colonna 7 → 7 (Naked Single)
  52. Riga 4 / Colonna 2 → 3 (Full House)
  53. Riga 6 / Colonna 2 → 8 (Naked Single)
  54. Riga 2 / Colonna 2 → 4 (Full House)
  55. Riga 5 / Colonna 1 → 7 (Full House)
  56. Riga 5 / Colonna 7 → 8 (Full House)
  57. Riga 6 / Colonna 7 → 1 (Full House)
  58. Riga 2 / Colonna 9 → 8 (Naked Single)
  59. Riga 1 / Colonna 9 → 7 (Full House)
  60. Riga 1 / Colonna 1 → 8 (Full House)
  61. Riga 2 / Colonna 1 → 3 (Full House)
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