Passi risolutivi (31)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in A6 changed to solution
Passo 2
Naked Singles
valore: 2.6
categoria doc: Getting_Started
Last candidate 2 in C6 changed to solution
Passo 3
Naked Singles
valore: 2.5
categoria doc: Getting_Started
Last candidate 8 in B5 changed to solution
Last candidate 9 in F6 changed to solution
Last candidate 4 in J6 changed to solution
Passo 4
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 6 in A5 changed to solution
Last candidate 5 in D6 changed to solution
Last candidate 1 in E5 changed to solution
Last candidate 1 in F8 changed to solution
Passo 5
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 3 in A4 changed to solution
Last candidate 2 in D4 changed to solution
Passo 6
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 8 in F4 changed to solution
Last candidate 6 in J4 changed to solution
Passo 7
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 1 in G4 changed to solution
Passo 8
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
2 in B7 is last in row/box
2 in J8 is last in column
5 in E8 is last in row/box
Passo 9
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 7 in J5 changed to solution
Passo 10
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 2 in H5 changed to solution
Passo 11
Naked Pair
valore: 14.3
categoria doc: Naked_Candidates
Naked Pair 3/9 on cells {D8|E7} means
- 3/9 can be removed from D9
Passo 12
Naked Pair
valore: 13.8
categoria doc: Naked_Candidates
Naked Pair 3/8 on cells {E3|J3} means
- 8 can be removed from C3
- 3 can be removed from D3
- 8 can be removed from G3
- 3 can be removed from H3
Passo 13
Pointing Pairs
valore: 40.9
categoria doc: Intersection_Removal
Pair: between Box 9 and Col 9:
- 3 can be removed from C9
Passo 14
Pointing Pairs
valore: 40
categoria doc: Intersection_Removal
Pair: between Box 9 and Col 9:
- 8 can be removed from A9
- 8 can be removed from C9
Passo 15
Line/Box Reduction
valore: 51.7
categoria doc: Intersection_Removal
Pair: between Col 2 and Box 4:
- 7 can be removed from D1
- 7 can be removed from D3
- 7 can be removed from F1
Passo 16
W-Wing
valore: 64
categoria doc: W_Wings
W-Wing (single). Either there is a 8 in A8 or in E2. They are connected through 9 in D8/E7, therefore
- 8 can be removed from A2
Passo 17
Pointing Pairs
valore: 37.6
categoria doc: Intersection_Removal
Pair: between Box 1 and Col 1:
- 8 can be removed from G1
- 8 can be removed from J1
Passo 18
XY-Chain
valore: 181.6
categoria doc: XY_Chains
length=5, chain ends: G7 and D9
This proves 6 is the solution at one or possibly both ends of the chain
-6[G7]+9[G7]-9[E7]+3[E7]-3[D8]+9[D8]-9[D2]+7[D2]-7[D9]+6[D9]
- 6 can be removed from F7
- 6 can be removed from G9
- 6 can be removed from H9
Last candidate 3 in H9 changed to solution
Passo 19
Hidden Singles
valore: 2.3
categoria doc: Getting_Started
6 in G7 is last in column/box
Passo 20
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 4 in G3 changed to solution
Passo 21
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
4 in A2 is last in column/box
Passo 22
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in A7 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 8 in A8 changed to solution
Last candidate 3 in E7 changed to solution
Passo 24
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 3 in C8 changed to solution
Last candidate 9 in D8 changed to solution
Last candidate 8 in E3 changed to solution
Passo 25
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 7 in D2 changed to solution
Last candidate 9 in E2 changed to solution
Last candidate 3 in J3 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in D9 changed to solution
Last candidate 2 in F2 changed to solution
Passo 27
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 1 in D3 changed to solution
Last candidate 6 in F1 changed to solution
Last candidate 8 in G2 changed to solution
Passo 28
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 7 in C3 changed to solution
Last candidate 3 in D1 changed to solution
Last candidate 9 in G9 changed to solution
Last candidate 7 in H1 changed to solution
Last candidate 5 in J2 changed to solution
Passo 29
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 5 in B1 changed to solution
Last candidate 4 in C7 changed to solution
Last candidate 2 in G1 changed to solution
Last candidate 6 in H3 changed to solution
Last candidate 9 in J1 changed to solution
Last candidate 8 in J9 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 1 in A1 changed to solution
Last candidate 7 in B9 changed to solution
Last candidate 1 in C9 changed to solution
Last candidate 7 in F7 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 5 in A9 changed to solution
Last candidate 8 in C1 changed to solution
Last candidate 4 in F9 changed to solution