Passi risolutivi (24)
Passo 1
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
4 in B5 is last in column/box
6 in F9 is last in row/box
8 in E9 is last in row/box
Passo 2
Hidden Singles
valore: 4.8
categoria doc: Getting_Started
8 in J1 is last in row
Passo 3
Hidden Singles
valore: 4.5
categoria doc: Getting_Started
6 in H2 is last in box
8 in B3 is last in row/column/box
Passo 4
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
3 in B1 is last in row/box
3 in F3 is last in column
4 in D2 is last in column
7 in G1 is last in box
Passo 5
Hidden Singles
valore: 3.6
categoria doc: Getting_Started
4 in C1 is last in column
5 in C3 is last in column
5 in E2 is last in box
Passo 6
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 7 in B2 changed to solution
Passo 7
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 1 in A2 changed to solution
Passo 8
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 6 in A1 changed to solution
Passo 9
Hidden Singles
valore: 3
categoria doc: Getting_Started
1 in E1 is last in row/column/box
6 in J5 is last in column
Passo 10
Hidden Pair
valore: 28.3
categoria doc: Hidden_Candidates
Hidden Pair 1/8 in Col 7, on cells {G7|H7}
- removes 9 from G7
- removes 9 from H7
Passo 11
Pointing Pairs
valore: 41.7
categoria doc: Intersection_Removal
Pair: between Box 3 and Col 8:
- 7 can be removed from H9
- 7 can be removed from J9
Passo 12
X-Wing
valore: 80.9
categoria doc: X_Wing_Strategy
(Row->Col) 5 taken off B4, based on BD67
(Row->Col) 5 taken off B8, based on BD67
(Row->Col) 5 taken off D9, based on BD67
Passo 13
Naked Pair
valore: 13.1
categoria doc: Naked_Candidates
Naked Pair 2/9 on cells {B4|B8} means
- 2/9 can be removed from B6
- 9 can be removed from B7
Passo 14
Rectangle Elimination
valore: 64.6
categoria doc: Rectangle_Elimination
If +3[H9] then -3[D9] forcing +3[D6] which removes all 3s from box 8, so H9 cannot be 3
Passo 15
Naked Pair
valore: 12.5
categoria doc: Naked_Candidates
Naked Pair 4/9 on cells {G9|H9} means
- 9 can be removed from C9
- 9 can be removed from D9
- 9 can be removed from H8
Last candidate 7 in C9 changed to solution
Passo 16
Naked Pair
valore: 11.8
categoria doc: Naked_Candidates
Naked Pair 2/3 on cells {D9|E8} means
- 2 can be removed from F8
Passo 17
W-Wing
valore: 58.5
categoria doc: W_Wings
W-Wing (single). Either there is a 5 in A9 or in F4. They are connected through 2 in B8/B4, therefore
- 5 can be removed from A4
Passo 18
Hidden Singles
valore: 2.3
categoria doc: Getting_Started
5 in A9 is last in row
5 in B6 is last in box
5 in F4 is last in column
Passo 19
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 6 in B7 changed to solution
Last candidate 9 in F8 changed to solution
Last candidate 3 in J9 changed to solution
Passo 20
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 2 in B8 changed to solution
Last candidate 9 in C7 changed to solution
Last candidate 5 in D7 changed to solution
Last candidate 2 in D9 changed to solution
Last candidate 2 in F1 changed to solution
Last candidate 7 in H8 changed to solution
Last candidate 7 in J6 changed to solution
Passo 21
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 9 in B4 changed to solution
Last candidate 1 in C4 changed to solution
Last candidate 9 in D1 changed to solution
Last candidate 3 in D6 changed to solution
Last candidate 3 in E8 changed to solution
Last candidate 2 in H5 changed to solution
Last candidate 5 in J8 changed to solution
Passo 22
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 7 in A5 changed to solution
Last candidate 6 in C6 changed to solution
Last candidate 2 in E6 changed to solution
Last candidate 8 in G4 changed to solution
Last candidate 4 in H3 changed to solution
Passo 23
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 2 in A4 changed to solution
Last candidate 7 in E4 changed to solution
Last candidate 2 in G3 changed to solution
Last candidate 1 in G7 changed to solution
Last candidate 3 in H4 changed to solution
Last candidate 9 in H9 changed to solution
Passo 24
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 9 in G6 changed to solution
Last candidate 4 in G9 changed to solution
Last candidate 1 in H6 changed to solution
Last candidate 8 in H7 changed to solution