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File jsonD:\inetpub\webs\ruggeriinfo\public\sudoku\json\L3_18_02_2026_2026_03_20_08_47_46962601.json
File pdfD:/inetpub/webs/ruggeriinfo/public/sudoku/pdf/L3_18_02_2026_2026_03_20_08_47_46962601_6_9.pdf

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Sudoku Solve Path

GradoTough Livello4 (precedente: 4)
Punteggio finale6.9 Punteggio precedente172
Indizi24 # Passi33
Versione generatoreversion 3.83, 14-Mar-2026
Soluzione281953467473826159659174328142568973865397241397412586716249835934785612528631794
FileD:\inetpub\webs\ruggeriinfo\public\sudoku\json\L3_18_02_2026_2026_03_20_08_47_46962601.json

Passi risolutivi (33)

Passo 1 Naked Singles valore: 0 categoria doc: Getting_Started
Last candidate 1 in E9 changed to solution
Passo 2 Hidden Singles valore: 5.6 categoria doc: Getting_Started
1 in D1 is last in column/box
2 in E7 is last in row/column/box
3 in J5 is last in column/box
Passo 3 Hidden Singles valore: 5.4 categoria doc: Getting_Started
5 in E3 is last in box
Passo 4 Naked Singles valore: 2.6 categoria doc: Getting_Started
Last candidate 9 in E5 changed to solution
Passo 5 Hidden Pair valore: 48.1 categoria doc: Hidden_Candidates
Hidden Pair 8/9 in Box 1, on cells {A2|C3}
- removes 2/7 from A2
- removes 3/6/7 from C3
Passo 6 Hidden Singles valore: 4.6 categoria doc: Getting_Started
2 in A1 is last in row/box
2 in J2 is last in column
3 in C7 is last in row
Passo 7 Naked Singles valore: 2.2 categoria doc: Getting_Started
Last candidate 5 in J1 changed to solution
Passo 8 Hidden Singles valore: 4.2 categoria doc: Getting_Started
8 in A2 is last in column
Passo 9 Naked Singles valore: 2 categoria doc: Getting_Started
Last candidate 9 in C3 changed to solution
Passo 10 Hidden Singles valore: 3.8 categoria doc: Getting_Started
8 in C9 is last in row/box
9 in A4 is last in row/box
Passo 11 Naked Singles valore: 1.8 categoria doc: Getting_Started
Last candidate 4 in J9 changed to solution
Passo 12 Naked Singles valore: 1.7 categoria doc: Getting_Started
Last candidate 8 in J3 changed to solution
Passo 13 Hidden Singles valore: 3.3 categoria doc: Getting_Started
4 in A7 is last in column/box
8 in G7 is last in row/box
Passo 14 Hidden Singles valore: 3.1 categoria doc: Getting_Started
9 in D7 is last in column
9 in G6 is last in row
9 in J8 is last in box
Passo 15 Naked Singles valore: 1.4 categoria doc: Getting_Started
Last candidate 1 in J6 changed to solution
Passo 16 Hidden Singles valore: 2.5 categoria doc: Getting_Started
2 in F6 is last in column
2 in G4 is last in row/box
9 in F2 is last in row/column/box
Passo 17 Hidden Singles valore: 2.2 categoria doc: Getting_Started
8 in D6 is last in column/box
8 in F8 is last in row
Passo 18 Pointing Pairs valore: 31.4 categoria doc: Intersection_Removal
Pair: between Box 5 and Col 5:
- 6 can be removed from A5
- 6 can be removed from C5
Passo 19 Line/Box Reduction valore: 40.7 categoria doc: Intersection_Removal
Pair: between Row A and Box 3:
- 6 can be removed from B7
- 6 can be removed from B8
Last candidate 1 in B7 changed to solution
Passo 20 Naked Singles valore: 1 categoria doc: Getting_Started
Last candidate 6 in H7 changed to solution
Passo 21 Naked Singles valore: 0.9 categoria doc: Getting_Started
Last candidate 5 in G9 changed to solution
Passo 22 Naked Singles valore: 0.9 categoria doc: Getting_Started
Last candidate 1 in H8 changed to solution
Passo 23 Y-Wing valore: 67.1 categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: G5 (4/7), wings A5 H6, therefore
- 5 can be removed from B6
Last candidate 6 in B6 changed to solution
Passo 24 Naked Singles valore: 0.8 categoria doc: Getting_Started
Last candidate 4 in C6 changed to solution
Passo 25 Naked Singles valore: 0.7 categoria doc: Getting_Started
Last candidate 5 in H6 changed to solution
Passo 26 Hidden Singles valore: 1.3 categoria doc: Getting_Started
5 in A5 is last in box
5 in B8 is last in row
5 in D4 is last in column
6 in C1 is last in row/box
6 in G3 is last in column
Passo 27 Naked Singles valore: 0.5 categoria doc: Getting_Started
Last candidate 7 in G1 changed to solution
Passo 28 Naked Singles valore: 0.5 categoria doc: Getting_Started
Last candidate 4 in G5 changed to solution
Passo 29 Naked Singles valore: 0.4 categoria doc: Getting_Started
Last candidate 6 in D5 changed to solution Last candidate 7 in H4 changed to solution
Passo 30 Naked Singles valore: 0.3 categoria doc: Getting_Started
Last candidate 1 in C4 changed to solution Last candidate 7 in D8 changed to solution Last candidate 1 in F5 changed to solution
Passo 31 Naked Singles valore: 0.2 categoria doc: Getting_Started
Last candidate 6 in A8 changed to solution Last candidate 7 in C5 changed to solution Last candidate 4 in D2 changed to solution Last candidate 4 in F4 changed to solution Last candidate 6 in F9 changed to solution
Passo 32 Naked Singles valore: 0.1 categoria doc: Getting_Started
Last candidate 7 in A9 changed to solution Last candidate 7 in F3 changed to solution Last candidate 3 in H2 changed to solution
Passo 33 Naked Singles valore: 0 categoria doc: Getting_Started
Last candidate 7 in B2 changed to solution Last candidate 3 in B3 changed to solution Last candidate 4 in H3 changed to solution