Passi risolutivi (29)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in A3 changed to solution
Passo 2
Naked Singles
valore: 2.5
categoria doc: Getting_Started
Last candidate 2 in A1 changed to solution
Passo 3
Naked Singles
valore: 2.5
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 4 in B1 changed to solution
Passo 4
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 8 in C3 changed to solution
Passo 5
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
1 in H2 is last in row/box
7 in C7 is last in column/box
8 in D1 is last in column/box
8 in E8 is last in row
8 in H6 is last in column/box
Passo 6
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 5 in C6 changed to solution
Passo 7
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 3 in C5 changed to solution
Passo 8
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 4 in C9 changed to solution
Passo 9
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
3 in A9 is last in row/box
4 in H4 is last in row
7 in B5 is last in column
7 in H1 is last in row/box
8 in J9 is last in row/column/box
Passo 10
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 2 in B6 changed to solution
Passo 11
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 6 in B4 changed to solution
Passo 12
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 1 in A5 changed to solution
Last candidate 9 in B9 changed to solution
Passo 13
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 6 in A8 changed to solution
Last candidate 1 in B8 changed to solution
Passo 14
Naked Pair
valore: 11.7
categoria doc: Naked_Candidates
Naked Pair 2/5 on cells {E5|H5} means
- 2/5 can be removed from G5
- 5 can be removed from J5
Passo 15
Rectangle Elimination
valore: 57.8
categoria doc: Rectangle_Elimination
If +2[E7] then -2[E5] forcing +2[H5] which removes all 2s from box 9, so E7 cannot be 2
Passo 16
W-Wing
valore: 57.1
categoria doc: W_Wings
W-Wing (single). Either there is a 3 in E7 or in J2. They are connected through 4 in F8/J8, therefore
- 3 can be removed from E2
Passo 17
Hidden Singles
valore: 2.3
categoria doc: Getting_Started
3 in E7 is last in row
Passo 18
Pointing Pairs
valore: 31.8
categoria doc: Intersection_Removal
Pair: between Box 6 and Row F:
- 4 can be removed from F2
- 4 can be removed from F3
Passo 19
Rectangle Elimination
valore: 52.3
categoria doc: Rectangle_Elimination
If +5[G3] then -5[E3] forcing +5[E5] which removes all 5s from box 8, so G3 cannot be 5
Passo 20
Pointing Pairs
valore: 30.9
categoria doc: Intersection_Removal
Pair: between Box 7 and Col 1:
- 5 can be removed from F1
Passo 21
XY-Chain
valore: 148.6
categoria doc: XY_Chains
length=5, chain ends: G4 and E5
This proves 2 is the solution at one or possibly both ends of the chain
-2[G4]+5[G4]-5[G1]+6[G1]-6[G3]+4[G3]-4[E3]+5[E3]-5[E5]+2[E5]
- 2 can be removed from D4
- 2 can be removed from F4
- 2 can be removed from H5
Last candidate 5 in H5 changed to solution
Passo 22
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 2 in E5 changed to solution
Last candidate 2 in G4 changed to solution
Last candidate 2 in H9 changed to solution
Passo 23
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 4 in E2 changed to solution
Passo 24
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 5 in E3 changed to solution
Last candidate 3 in J2 changed to solution
Passo 25
Hidden Singles
valore: 1.2
categoria doc: Getting_Started
3 in D4 is last in row
3 in F1 is last in column/box
4 in G3 is last in column/box
5 in G1 is last in row
5 in J8 is last in box
Passo 26
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 9 in D8 changed to solution
Last candidate 5 in F4 changed to solution
Last candidate 9 in G7 changed to solution
Last candidate 6 in J1 changed to solution
Passo 27
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 7 in D6 changed to solution
Last candidate 4 in F8 changed to solution
Last candidate 6 in F9 changed to solution
Last candidate 6 in G5 changed to solution
Last candidate 9 in J5 changed to solution
Last candidate 4 in J7 changed to solution
Passo 28
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 2 in D2 changed to solution
Last candidate 5 in D9 changed to solution
Last candidate 1 in F3 changed to solution
Last candidate 9 in F6 changed to solution
Passo 29
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 6 in D3 changed to solution
Last candidate 1 in D7 changed to solution
Last candidate 7 in F2 changed to solution
Last candidate 2 in F7 changed to solution