Passi risolutivi (22)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 8 in D4 changed to solution
Last candidate 1 in F4 changed to solution
Passo 2
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
2 in A4 is last in column/box
2 in G9 is last in column/box
5 in C6 is last in column
5 in D7 is last in row
5 in F1 is last in column/box
5 in H5 is last in row/box
9 in E7 is last in row/box
Passo 3
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 8 in C5 changed to solution
Passo 4
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 4 in C8 changed to solution
Passo 5
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 2 in E8 changed to solution
Passo 6
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 6 in F8 changed to solution
Passo 7
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 4 in F7 changed to solution
Last candidate 8 in H8 changed to solution
Passo 8
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 7 in A8 changed to solution
Last candidate 3 in D9 changed to solution
Last candidate 7 in F6 changed to solution
Passo 9
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 6 in A5 changed to solution
Last candidate 5 in B8 changed to solution
Last candidate 4 in D6 changed to solution
Last candidate 2 in F3 changed to solution
Passo 10
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 7 in B5 changed to solution
Last candidate 6 in D2 changed to solution
Last candidate 7 in D3 changed to solution
Passo 11
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
4 in H9 is last in column/box
7 in J1 is last in row/column/box
Passo 12
Hidden Singles
valore: 1.8
categoria doc: Getting_Started
2 in B1 is last in column
2 in J2 is last in row/box
6 in B9 is last in column
Passo 13
Naked Pair
valore: 8.4
categoria doc: Naked_Candidates
Naked Pair 1/9 on cells {A9|C9} means
- 1 can be removed from A7
Passo 14
Hidden Pair
valore: 15.7
categoria doc: Hidden_Candidates
Hidden Pair 4/8 in Box 7, on cells {G2|J3}
- removes 1/9 from G2
- removes 1/3 from J3
Passo 15
Line/Box Reduction
valore: 30.8
categoria doc: Intersection_Removal
Pair: between Row C and Box 0:
- 9 can be removed from A3
Passo 16
XY-Chain
valore: 141.1
categoria doc: XY_Chains
length=7, chain ends: J3 and B2
This proves 8 is the solution at one or possibly both ends of the chain
-8[J3]+4[J3]-4[G2]+8[G2]-8[G6]+9[G6]-9[G4]+6[G4]-6[G1]+1[G1]-1[H2]+9[H2]-9[B2]+8[B2]
- 8 can be removed from A3
- 8 can be removed from B3
Passo 17
Hidden Singles
valore: 1.4
categoria doc: Getting_Started
8 in A7 is last in row
8 in B2 is last in box
8 in J3 is last in column
Passo 18
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 3 in B7 changed to solution
Last candidate 4 in G2 changed to solution
Last candidate 3 in J6 changed to solution
Passo 19
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 9 in A6 changed to solution
Last candidate 9 in B3 changed to solution
Last candidate 1 in E2 changed to solution
Last candidate 1 in G5 changed to solution
Last candidate 6 in J4 changed to solution
Passo 20
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 1 in A9 changed to solution
Last candidate 3 in C4 changed to solution
Last candidate 4 in E3 changed to solution
Last candidate 6 in G1 changed to solution
Last candidate 9 in G4 changed to solution
Last candidate 8 in G6 changed to solution
Last candidate 9 in H2 changed to solution
Last candidate 4 in J5 changed to solution
Last candidate 1 in J7 changed to solution
Passo 21
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 3 in A3 changed to solution
Last candidate 1 in C1 changed to solution
Last candidate 9 in C9 changed to solution
Last candidate 6 in H7 changed to solution
Passo 22
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 3 in H1 changed to solution
Last candidate 1 in H3 changed to solution