Passi risolutivi (26)
Passo 1
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
1 in D1 is last in row/box
1 in H9 is last in box
2 in C9 is last in row/box
2 in H4 is last in column/box
6 in B7 is last in column
6 in J5 is last in column/box
7 in A8 is last in column/box
7 in E5 is last in row/box
Passo 2
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
1 in A4 is last in row
1 in B8 is last in column/box
1 in J3 is last in row/column/box
2 in D8 is last in row
9 in F5 is last in column/box
9 in H7 is last in row/box
Passo 3
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 4 in F8 changed to solution
Passo 4
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 9 in E8 changed to solution
Passo 5
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
2 in E3 is last in column
2 in J1 is last in row/box
3 in A3 is last in row
9 in B9 is last in column/box
9 in C6 is last in row
Passo 6
Hidden Singles
valore: 2.8
categoria doc: Getting_Started
7 in C4 is last in row/box
Passo 7
Pointing Pairs
valore: 40.4
categoria doc: Intersection_Removal
Pair: between Box 5 and Row D:
- 4 can be removed from D2
Passo 8
Y-Wing
valore: 106.7
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: G4 (4/5), wings F4 G9, therefore
- 3 can be removed from F9
Passo 9
W-Wing
valore: 66
categoria doc: W_Wings
W-Wing (single). Either there is a 5 in A5 or in G4. They are connected through 4 in A9/G9, therefore
- 5 can be removed from B4
Passo 10
Y-Wing
valore: 104.5
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: B4 (3/4), wings A5 F4, therefore
- 5 can be removed from D5
Last candidate 4 in D5 changed to solution
Passo 11
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 5 in A5 changed to solution
Passo 12
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
5 in C7 is last in box
Passo 13
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 4 in C1 changed to solution
Passo 14
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
4 in E2 is last in row/box
Passo 15
Rectangle Elimination
valore: 48.8
categoria doc: Rectangle_Elimination
If +3[E1] then -3[E7] forcing +3[J7] which removes all 3s from box 7, so E1 cannot be 3
Passo 16
Naked Pair
valore: 9.1
categoria doc: Naked_Candidates
Naked Pair 5/8 on cells {B1|E1} means
- 5/8 can be removed from F1
- 5/8 can be removed from G1
- 5 can be removed from H1
Passo 17
Line/Box Reduction
valore: 35.8
categoria doc: Intersection_Removal
Pair: between Row E and Box 6:
- 3 can be removed from D9
Passo 18
W-Wing
valore: 44
categoria doc: W_Wings
W-Wing (single). Either there is a 3 in E7 or in J2. They are connected through 8 in E1/F2, therefore
- 3 can be removed from J7
Last candidate 4 in J7 changed to solution
Passo 19
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 8 in A7 changed to solution
Last candidate 3 in G9 changed to solution
Last candidate 8 in J6 changed to solution
Passo 20
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 4 in A9 changed to solution
Last candidate 3 in E7 changed to solution
Last candidate 7 in G1 changed to solution
Last candidate 3 in J2 changed to solution
Passo 21
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 6 in H1 changed to solution
Passo 22
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 3 in F1 changed to solution
Last candidate 5 in H2 changed to solution
Passo 23
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 6 in D2 changed to solution
Last candidate 5 in F4 changed to solution
Last candidate 4 in H3 changed to solution
Passo 24
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 3 in D6 changed to solution
Last candidate 5 in D9 changed to solution
Last candidate 8 in F2 changed to solution
Last candidate 8 in G3 changed to solution
Last candidate 4 in G4 changed to solution
Last candidate 7 in H6 changed to solution
Passo 25
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 5 in B3 changed to solution
Last candidate 3 in B4 changed to solution
Last candidate 4 in B6 changed to solution
Last candidate 5 in E1 changed to solution
Last candidate 8 in E9 changed to solution
Last candidate 6 in F9 changed to solution
Last candidate 5 in G6 changed to solution
Passo 26
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 8 in B1 changed to solution