Sudoku Solve Path

File json	D:\inetpub\webs\ruggeriinfo\public\sudoku\json\L3_09_03_2026_2026_03_20_08_57_17812860.json
File pdf	D:/inetpub/webs/ruggeriinfo/public/sudoku/pdf/L3_09_03_2026_2026_03_20_08_57_17812860_7_6.pdf

Grado	Tough	Livello	4 (precedente: 4)
Punteggio finale	7.6	Punteggio precedente	164
Indizi	26	# Passi	33
Versione generatore	version 3.83, 14-Mar-2026
Soluzione	648571392392864715571923648924617583183295476765348921839752164216439857457186239
File	D:\inetpub\webs\ruggeriinfo\public\sudoku\json\L3_09_03_2026_2026_03_20_08_57_17812860.json

Passi risolutivi (33)

Passo 1 Naked Singles valore: 0 categoria doc: Getting_Started

Last candidate 7 in J3 changed to solution Last candidate 9 in J9 changed to solution

Passo 2 Naked Singles valore: 2.5 categoria doc: Getting_Started

Last candidate 5 in J2 changed to solution

Passo 3 Naked Singles valore: 2.4 categoria doc: Getting_Started

Last candidate 8 in J5 changed to solution

Passo 4 Naked Singles valore: 2.3 categoria doc: Getting_Started

Last candidate 1 in J4 changed to solution

Passo 5 Naked Singles valore: 2.3 categoria doc: Getting_Started

Last candidate 2 in J7 changed to solution

Passo 6 Hidden Singles valore: 4.2 categoria doc: Getting_Started

1 in G7 is last in row/column/box
3 in A7 is last in column/box
5 in C1 is last in row/column/box
9 in B2 is last in column/box

Passo 7 Hidden Singles valore: 4 categoria doc: Getting_Started

7 in C2 is last in column/box
9 in A8 is last in row/box

Passo 8 Naked Singles valore: 1.9 categoria doc: Getting_Started

Last candidate 4 in C8 changed to solution

Passo 9 Naked Singles valore: 1.8 categoria doc: Getting_Started

Last candidate 7 in B7 changed to solution

Passo 10 Hidden Singles valore: 3.4 categoria doc: Getting_Started

4 in D3 is last in row

Passo 11 Pointing Pairs valore: 49.1 categoria doc: Intersection_Removal

Pair: between Box 1 and Col 3:
- 2 can be removed from E3

Passo 12 Pointing Pairs valore: 48.7 categoria doc: Intersection_Removal

Pair: between Box 1 and Col 3:
- 8 can be removed from E3

Passo 13 Rectangle Elimination valore: 80.5 categoria doc: Rectangle_Elimination

If +6[E3] then -6[E9] forcing +6[G9] which removes all 6s from box 7, so E3 cannot be 6

Passo 14 Y-Wing valore: 127.6 categoria doc: Y_Wing_Strategy

Y-Wing pattern. Hinge: C3 (1/2), wings C5 E3, therefore
- 3 can be removed from E5

Passo 15 Rectangle Elimination valore: 79.1 categoria doc: Rectangle_Elimination

If +6[G2] then -6[G9] forcing +6[E9] which removes all 6s from box 4, so G2 cannot be 6
Last candidate 3 in G2 changed to solution

Passo 16 Naked Singles valore: 1.5 categoria doc: Getting_Started

Last candidate 6 in H3 changed to solution

Passo 17 Hidden Singles valore: 2.8 categoria doc: Getting_Started

3 in E3 is last in column/box
6 in A1 is last in box

Passo 18 Naked Singles valore: 1.3 categoria doc: Getting_Started

Last candidate 7 in A5 changed to solution Last candidate 1 in E1 changed to solution

Passo 19 Naked Singles valore: 1.3 categoria doc: Getting_Started

Last candidate 5 in G5 changed to solution

Passo 20 Naked Singles valore: 1.2 categoria doc: Getting_Started

Last candidate 6 in G8 changed to solution

Passo 21 Naked Singles valore: 1.1 categoria doc: Getting_Started

Last candidate 4 in G9 changed to solution

Passo 22 Naked Singles valore: 1.1 categoria doc: Getting_Started

Last candidate 6 in E9 changed to solution Last candidate 7 in G4 changed to solution Last candidate 8 in H7 changed to solution

Passo 23 Naked Singles valore: 0.9 categoria doc: Getting_Started

Last candidate 9 in F7 changed to solution Last candidate 5 in H8 changed to solution

Passo 24 Naked Singles valore: 0.9 categoria doc: Getting_Started

Last candidate 4 in E7 changed to solution

Passo 25 Hidden Singles valore: 1.6 categoria doc: Getting_Started

5 in E6 is last in row/column/box
6 in B5 is last in column

Passo 26 Hidden Singles valore: 1.3 categoria doc: Getting_Started

7 in D6 is last in column/box
7 in E8 is last in row
9 in E5 is last in row/box
9 in H6 is last in column

Passo 27 Naked Singles valore: 0.6 categoria doc: Getting_Started

Last candidate 3 in H5 changed to solution

Passo 28 Naked Singles valore: 0.6 categoria doc: Getting_Started

Last candidate 2 in C5 changed to solution Last candidate 4 in H4 changed to solution

Passo 29 Naked Singles valore: 0.5 categoria doc: Getting_Started

Last candidate 8 in B4 changed to solution Last candidate 1 in C3 changed to solution

Passo 30 Naked Singles valore: 0.3 categoria doc: Getting_Started

Last candidate 8 in A3 changed to solution Last candidate 1 in A6 changed to solution Last candidate 2 in B3 changed to solution Last candidate 4 in B6 changed to solution Last candidate 3 in C6 changed to solution Last candidate 2 in E4 changed to solution

Passo 31 Naked Singles valore: 0.2 categoria doc: Getting_Started

Last candidate 6 in D4 changed to solution Last candidate 8 in E2 changed to solution Last candidate 8 in F6 changed to solution

Passo 32 Naked Singles valore: 0.1 categoria doc: Getting_Started

Last candidate 2 in D2 changed to solution Last candidate 3 in F4 changed to solution Last candidate 2 in F8 changed to solution

Passo 33 Naked Singles valore: 0 categoria doc: Getting_Started

Last candidate 8 in D8 changed to solution Last candidate 6 in F2 changed to solution

PDF :::: Sudoku Solve Path

Sudoku Solve Path

Passi risolutivi (33)