Passi risolutivi (31)
Passo 1
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
4 in C7 is last in row/box
4 in H5 is last in row/box
8 in A6 is last in row
8 in B1 is last in column/box
9 in B4 is last in row/box
9 in D3 is last in row/column/box
Passo 2
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 5 in B9 changed to solution
Passo 3
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 8 in C9 changed to solution
Passo 4
Hidden Singles
valore: 4.4
categoria doc: Getting_Started
2 in G5 is last in column/box
4 in D8 is last in row
Passo 5
Hidden Singles
valore: 4.1
categoria doc: Getting_Started
2 in B8 is last in column
5 in C5 is last in column
Passo 6
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 1 in B7 changed to solution
Passo 7
Naked Pair
valore: 18.2
categoria doc: Naked_Candidates
Naked Pair 3/7 on cells {G1|G4} means
- 3/7 can be removed from G3
- 3/7 can be removed from G6
- 3 can be removed from G7
- 7 can be removed from G8
Passo 8
Hidden Pair
valore: 35.5
categoria doc: Hidden_Candidates
Hidden Pair 5/9 in Col 6, on cells {G6|H6}
- removes 3/6/7 from H6
Passo 9
Pointing Pairs
valore: 52.4
categoria doc: Intersection_Removal
Pair: between Box 2 and Col 5:
- 3 can be removed from E5
- 3 can be removed from J5
Passo 10
Pointing Pairs
valore: 51.6
categoria doc: Intersection_Removal
Pair: between Box 8 and Col 4:
- 3 can be removed from E4
- 3 can be removed from F4
Passo 11
Pointing Pairs
valore: 50.8
categoria doc: Intersection_Removal
Pair: between Box 1 and Col 3:
- 6 can be removed from E3
- 6 can be removed from F3
Passo 12
Pointing Pairs
valore: 50.3
categoria doc: Intersection_Removal
Pair: between Box 8 and Row J:
- 6 can be removed from J7
Last candidate 3 in J7 changed to solution
Passo 13
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
3 in G4 is last in column/box
Passo 14
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 7 in G1 changed to solution
Passo 15
Line/Unit Reduction
valore: 56.7
categoria doc: Intersection_Removal
Line/Box Reduction: 3s in box 4 remove the following in the same box:
- 3 can be removed from D2
- 3 can be removed from E1
- 3 can be removed from E3
Passo 16
XY-Chain
valore: 182.4
categoria doc: XY_Chains
length=4, chain ends: B2 and F1
This proves 3 is the solution at one or possibly both ends of the chain
-3[B2]+7[B2]-7[D2]+2[D2]-2[E1]+6[E1]-6[F1]+3[F1]
- 3 can be removed from F2
Passo 17
XY-Chain
valore: 177
categoria doc: XY_Chains
length=4, chain ends: G3 and F2
This proves 5 is the solution at one or possibly both ends of the chain
-5[G3]+1[G3]-1[A3]+3[A3]-3[B2]+7[B2]-7[F2]+5[F2]
- 5 can be removed from E3
- 5 can be removed from F3
- 5 can be removed from H2
Passo 18
Hidden Singles
valore: 2.6
categoria doc: Getting_Started
5 in E7 is last in row
5 in F2 is last in column/box
Passo 19
Hidden Singles
valore: 2.5
categoria doc: Getting_Started
2 in D7 is last in column/box
Passo 20
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 7 in D2 changed to solution
Passo 21
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 3 in B2 changed to solution
Passo 22
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 1 in A3 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 3 in A5 changed to solution
Last candidate 2 in C2 changed to solution
Last candidate 5 in G3 changed to solution
Passo 24
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 9 in G6 changed to solution
Last candidate 1 in H2 changed to solution
Passo 25
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 8 in G7 changed to solution
Last candidate 5 in H6 changed to solution
Last candidate 7 in H8 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in F7 changed to solution
Last candidate 8 in F8 changed to solution
Last candidate 1 in G8 changed to solution
Last candidate 6 in H9 changed to solution
Passo 27
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 3 in D9 changed to solution
Last candidate 3 in F1 changed to solution
Last candidate 9 in H7 changed to solution
Passo 28
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 6 in D6 changed to solution
Last candidate 7 in E9 changed to solution
Last candidate 4 in F3 changed to solution
Last candidate 2 in H1 changed to solution
Passo 29
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 7 in C6 changed to solution
Last candidate 6 in E1 changed to solution
Last candidate 2 in E3 changed to solution
Last candidate 1 in E5 changed to solution
Last candidate 3 in E6 changed to solution
Last candidate 7 in F4 changed to solution
Last candidate 3 in H3 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 6 in B5 changed to solution
Last candidate 6 in C3 changed to solution
Last candidate 4 in E4 changed to solution
Last candidate 6 in J4 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in B3 changed to solution
Last candidate 1 in C4 changed to solution
Last candidate 7 in J5 changed to solution