Passi risolutivi (20)
Passo 1
Hidden Singles
valore: 5.2
categoria doc: Getting_Started
5 in A8 is last in row/column/box
5 in B1 is last in row/column/box
5 in D4 is last in column
5 in G5 is last in row/box
8 in G9 is last in column/box
Passo 2
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
4 in H5 is last in box
8 in D3 is last in row
8 in F4 is last in column/box
Passo 3
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
1 in J6 is last in box
2 in E4 is last in column
Passo 4
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
7 in A4 is last in column
Passo 5
Naked Pair
valore: 18.3
categoria doc: Naked_Candidates
Naked Pair 3/6 on cells {B3|J3} means
- 3/6 can be removed from H3
Passo 6
Hidden Pair
valore: 35.5
categoria doc: Hidden_Candidates
Hidden Pair 4/7 in Box 3, on cells {C7|C9}
- removes 2/6 from C7
- removes 3/6 from C9
Passo 7
Pointing Pairs
valore: 52.8
categoria doc: Intersection_Removal
Pair: between Box 4 and Row F:
- 2 can be removed from F7
Passo 8
Pointing Pairs
valore: 52
categoria doc: Intersection_Removal
Pair: between Box 4 and Row E:
- 3 can be removed from E5
- 3 can be removed from E6
Passo 9
Pointing Pairs
valore: 51.6
categoria doc: Intersection_Removal
Pair: between Box 9 and Row H:
- 6 can be removed from H1
Passo 10
Hidden Pair
valore: 33.8
categoria doc: Hidden_Candidates
Hidden Pair 6/8 in Col 1, on cells {C1|J1}
- removes 3 from C1
- removes 3 from J1
Passo 11
XY-Chain
valore: 218.2
categoria doc: XY_Chains
length=4, chain ends: A7 and G8
This proves 9 is the solution at one or possibly both ends of the chain
-9[A7]+6[A7]-6[C8]+2[C8]-2[D8]+1[D8]-1[G8]+9[G8]
- 9 can be removed from H7
Passo 12
XY-Chain
valore: 249.7
categoria doc: XY_Chains
length=5, chain ends: C2 and D5
This proves 3 is the solution at one or possibly both ends of the chain
-3[C2]+8[C2]-8[C1]+6[C1]-6[C8]+2[C8]-2[D8]+1[D8]-1[D5]+3[D5]
- 3 can be removed from C5
Passo 13
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
3 in C2 is last in row
Passo 14
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 6 in B3 changed to solution
Last candidate 8 in C1 changed to solution
Last candidate 6 in J1 changed to solution
Last candidate 3 in J3 changed to solution
Last candidate 9 in J4 changed to solution
Last candidate 2 in H1 changed to solution
Last candidate 1 in H3 changed to solution
Last candidate 3 in H4 changed to solution
Last candidate 6 in H7 changed to solution
Last candidate 9 in H9 changed to solution
Last candidate 8 in J2 changed to solution
Passo 15
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in A7 changed to solution
Last candidate 7 in G3 changed to solution
Last candidate 1 in G8 changed to solution
Last candidate 2 in D8 changed to solution
Last candidate 2 in F3 changed to solution
Last candidate 4 in G1 changed to solution
Last candidate 9 in G2 changed to solution
Passo 16
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in C8 changed to solution
Last candidate 9 in E8 changed to solution
Last candidate 7 in F1 changed to solution
Last candidate 3 in A9 changed to solution
Last candidate 1 in B9 changed to solution
Last candidate 2 in C5 changed to solution
Last candidate 3 in E1 changed to solution
Passo 17
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 6 in A6 changed to solution
Last candidate 2 in B7 changed to solution
Passo 18
Hidden Singles
valore: 0.9
categoria doc: Getting_Started
6 in E9 is last in column/box
6 in F5 is last in row
Passo 19
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 1 in E5 changed to solution
Last candidate 3 in D5 changed to solution
Last candidate 4 in E2 changed to solution
Last candidate 7 in E6 changed to solution
Last candidate 1 in F2 changed to solution
Last candidate 4 in F7 changed to solution
Passo 20
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in B5 changed to solution
Last candidate 3 in B6 changed to solution
Last candidate 7 in C7 changed to solution
Last candidate 4 in C9 changed to solution
Last candidate 4 in D6 changed to solution
Last candidate 1 in D7 changed to solution
Last candidate 7 in D9 changed to solution
Last candidate 9 in F6 changed to solution