Soluzione per Sudoku difficile #2251823796418

1
2
9
7
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8
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1

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: 1,2,8 in r3c456 => r1c5,r2c46,r3c37<>8, r1c5,r3c7<>2, r2c46<>1
  3. Riga 1 / Colonna 5 → 9 (Naked Single)
  4. Riga 7 / Colonna 5 → 1 (Naked Single)
  5. Locked Candidates Type 1 (Pointing): 6 in b2 => r2c2<>6
  6. Locked Candidates Type 1 (Pointing): 7 in b2 => r2c78<>7
  7. Locked Candidates Type 1 (Pointing): 7 in b8 => r7c3<>7
  8. Naked Pair: 2,8 in r39c5 => r46c5<>2, r4c5<>8
  9. X-Wing: 3 r37 c37 => r2c37,r458c3,r568c7<>3
  10. Skyscraper: 3 in r5c2,r8c1 (connected by r58c8) => r46c1<>3
  11. Riga 8 / Colonna 1 → 3 (Hidden Single)
  12. Riga 7 / Colonna 7 → 3 (Hidden Single)
  13. Riga 3 / Colonna 7 → 4 (Naked Single)
  14. Riga 3 / Colonna 3 → 3 (Naked Single)
  15. Riga 8 / Colonna 3 → 5 (Hidden Single)
  16. Riga 2 / Colonna 3 → 8 (Naked Single)
  17. Riga 1 / Colonna 2 → 6 (Naked Single)
  18. Riga 2 / Colonna 2 → 5 (Naked Single)
  19. Riga 1 / Colonna 1 → 4 (Full House)
  20. Riga 2 / Colonna 7 → 9 (Naked Single)
  21. Riga 9 / Colonna 2 → 9 (Naked Single)
  22. Riga 6 / Colonna 2 → 3 (Naked Single)
  23. Riga 5 / Colonna 2 → 8 (Full House)
  24. Riga 7 / Colonna 3 → 4 (Naked Single)
  25. Riga 6 / Colonna 5 → 5 (Naked Single)
  26. Riga 7 / Colonna 6 → 7 (Naked Single)
  27. Riga 7 / Colonna 4 → 9 (Full House)
  28. Riga 9 / Colonna 3 → 7 (Naked Single)
  29. Riga 9 / Colonna 1 → 6 (Full House)
  30. Riga 4 / Colonna 5 → 3 (Naked Single)
  31. Riga 6 / Colonna 1 → 7 (Naked Single)
  32. Riga 4 / Colonna 1 → 5 (Full House)
  33. Riga 2 / Colonna 6 → 6 (Naked Single)
  34. Riga 4 / Colonna 3 → 2 (Naked Single)
  35. Riga 5 / Colonna 3 → 9 (Full House)
  36. Riga 6 / Colonna 7 → 2 (Naked Single)
  37. Riga 2 / Colonna 4 → 7 (Naked Single)
  38. Riga 5 / Colonna 6 → 2 (Naked Single)
  39. Riga 4 / Colonna 9 → 1 (Naked Single)
  40. Riga 5 / Colonna 7 → 5 (Naked Single)
  41. Riga 5 / Colonna 8 → 3 (Naked Single)
  42. Riga 5 / Colonna 4 → 6 (Full House)
  43. Riga 6 / Colonna 6 → 1 (Naked Single)
  44. Riga 4 / Colonna 4 → 8 (Full House)
  45. Riga 4 / Colonna 8 → 7 (Full House)
  46. Riga 6 / Colonna 9 → 9 (Full House)
  47. Riga 8 / Colonna 7 → 8 (Naked Single)
  48. Riga 1 / Colonna 7 → 7 (Full House)
  49. Riga 2 / Colonna 9 → 3 (Naked Single)
  50. Riga 2 / Colonna 8 → 1 (Full House)
  51. Riga 3 / Colonna 6 → 8 (Naked Single)
  52. Riga 8 / Colonna 6 → 4 (Full House)
  53. Riga 8 / Colonna 4 → 2 (Naked Single)
  54. Riga 3 / Colonna 4 → 1 (Full House)
  55. Riga 3 / Colonna 5 → 2 (Full House)
  56. Riga 8 / Colonna 8 → 9 (Full House)
  57. Riga 9 / Colonna 5 → 8 (Full House)
  58. Riga 1 / Colonna 8 → 2 (Naked Single)
  59. Riga 1 / Colonna 9 → 8 (Full House)
  60. Riga 9 / Colonna 9 → 2 (Full House)
  61. Riga 9 / Colonna 8 → 4 (Full House)
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