Passi risolutivi (18)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 5 in G4 changed to solution
Last candidate 7 in J4 changed to solution
Last candidate 4 in H4 changed to solution
Passo 2
Naked Singles
valore: 2.7
categoria doc: Getting_Started
Last candidate 1 in B4 changed to solution
Last candidate 8 in E4 changed to solution
Passo 3
Hidden Singles
valore: 5
categoria doc: Getting_Started
4 in C1 is last in box
6 in H6 is last in column
7 in B5 is last in column/box
7 in H7 is last in row/box
9 in G5 is last in box
9 in J2 is last in row
Passo 4
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 3 in H5 changed to solution
Last candidate 5 in C5 changed to solution
Last candidate 4 in E5 changed to solution
Last candidate 5 in E6 changed to solution
Passo 5
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 4 in B6 changed to solution
Passo 6
Naked Pair
valore: 17.7
categoria doc: Naked_Candidates
Naked Pair 5/8 on cells {H1|H3} means
- 8 can be removed from G2
- 8 can be removed from G3
- 5 can be removed from J1
Passo 7
Naked Pair
valore: 17.2
categoria doc: Naked_Candidates
Naked Pair 2/3 on cells {E2|G2} means
- 2/3 can be removed from A2
- 2/3 can be removed from F2
Last candidate 5 in A2 changed to solution
Passo 8
Naked Pair
valore: 15.5
categoria doc: Naked_Candidates
Naked Pair 4/8 on cells {D2|F2} means
- 8 can be removed from D1
- 8 can be removed from D3
- 8 can be removed from F1
- 8 can be removed from F3
Passo 9
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
8 in H1 is last in column
Passo 10
Hidden Pair
valore: 28.6
categoria doc: Hidden_Candidates
Hidden Pair 7/9 in Col 3, on cells {D3|E3}
- removes 6 from D3
- removes 2/3 from E3
Passo 11
Naked Triple
valore: 53.9
categoria doc: Naked_Candidates
Naked Triple 3/5/8 on cells {B9|G9|J9} means
- 8 can be removed from C9
- 5/8 can be removed from D9
- 3/5/8 can be removed from F9
Passo 12
Pointing Pairs
valore: 40
categoria doc: Intersection_Removal
Pair: between Box 6 and Col 7:
- 3 can be removed from G7
Passo 13
Rectangle Elimination
valore: 66
categoria doc: Rectangle_Elimination
If +2[F7] then -2[F1] forcing +2[A1] which removes all 2s from box 3, so F7 cannot be 2
Passo 14
XY-Chain
valore: 169.9
categoria doc: XY_Chains
length=4, chain ends: A1 and J9
This proves 3 is the solution at one or possibly both ends of the chain
-3[A1]+2[A1]-2[B3]+8[B3]-8[B9]+5[B9]-5[J9]+3[J9]
- 3 can be removed from J1
Last candidate 6 in J1 changed to solution
Last candidate 5 in J8 changed to solution
Last candidate 3 in J9 changed to solution
Passo 15
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 5 in D1 changed to solution
Last candidate 8 in G9 changed to solution
Last candidate 5 in B9 changed to solution
Last candidate 6 in G7 changed to solution
Passo 16
Hidden Singles
valore: 1.8
categoria doc: Getting_Started
5 in F7 is last in row/column/box
6 in C8 is last in row/column/box
6 in D5 is last in row
6 in F3 is last in column/box
Passo 17
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 8 in F2 changed to solution
Last candidate 2 in F8 changed to solution
Last candidate 4 in D2 changed to solution
Last candidate 7 in E8 changed to solution
Last candidate 3 in F1 changed to solution
Passo 18
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 2 in A1 changed to solution
Last candidate 1 in A8 changed to solution
Last candidate 8 in B3 changed to solution
Last candidate 2 in B7 changed to solution
Last candidate 9 in C9 changed to solution
Last candidate 8 in D8 changed to solution
Last candidate 1 in D9 changed to solution
Last candidate 2 in E2 changed to solution
Last candidate 9 in E3 changed to solution
Last candidate 3 in E7 changed to solution
Last candidate 3 in G2 changed to solution
Last candidate 2 in G3 changed to solution
Last candidate 3 in A3 changed to solution
Last candidate 9 in A6 changed to solution
Last candidate 7 in A9 changed to solution
Last candidate 1 in C3 changed to solution
Last candidate 3 in C6 changed to solution
Last candidate 8 in C7 changed to solution
Last candidate 7 in D3 changed to solution
Last candidate 9 in D7 changed to solution