Passi risolutivi (30)
Passo 1
Hidden Singles
valore: 5.6
categoria doc: Getting_Started
2 in H2 is last in column/box
3 in A7 is last in row/box
7 in C3 is last in row
7 in J8 is last in column/box
8 in J9 is last in row/box
Passo 2
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
4 in G2 is last in column/box
8 in C5 is last in row
Passo 3
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 9 in G7 changed to solution
Passo 4
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
2 in C7 is last in row
7 in G1 is last in row/box
Passo 5
Hidden Singles
valore: 4.3
categoria doc: Getting_Started
7 in E2 is last in row
Passo 6
Naked Pair
valore: 20.6
categoria doc: Naked_Candidates
Naked Pair 6/9 on cells {C8|C9} means
- 6/9 can be removed from A9
- 6 can be removed from B7
- 6/9 can be removed from B8
Passo 7
Naked Pair
valore: 20.2
categoria doc: Naked_Candidates
Naked Pair 4/6 on cells {H7|H8} means
- 6 can be removed from H3
- 4 can be removed from H4
- 4 can be removed from H6
Passo 8
Pointing Pairs
valore: 59.4
categoria doc: Intersection_Removal
Pair: between Box 7 and Col 3:
- 1 can be removed from B3
- 1 can be removed from D3
- 1 can be removed from E3
Passo 9
Pointing Pairs
valore: 58.6
categoria doc: Intersection_Removal
Pair: between Box 7 and Col 3:
- 3 can be removed from D3
- 3 can be removed from E3
Passo 10
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
3 in E8 is last in row
Passo 11
Pointing Pairs
valore: 55.3
categoria doc: Intersection_Removal
Pair: between Box 3 and Row B:
- 5 can be removed from B5
- 5 can be removed from B6
Passo 12
XY-Chain
valore: 230.7
categoria doc: XY_Chains
length=4. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-4[B6]+9[B6]-9[H6]+1[H6]-1[G5]+5[G5]-5[J6]+4[J6]
- 9 can be removed from A6
- 9 can be removed from D6
- 9 can be removed from F6
- 5 can be removed from J5
- 4 can be removed from A6
Passo 13
3D Medusa
valore: 277.3
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 4 in A4 can see coloured 4 elsewhere and an oppositely coloured 7 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 9 in A5 can see coloured 9 elsewhere and an oppositely coloured 5 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 9 in F4 can see coloured 9 elsewhere and an oppositely coloured 7 in its own cell. It can be removed.
Passo 14
Hidden Singles
valore: 3.4
categoria doc: Getting_Started
4 in A9 is last in row
Passo 15
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 5 in B7 changed to solution
Passo 16
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 1 in B8 changed to solution
Passo 17
Hidden Singles
valore: 3
categoria doc: Getting_Started
4 in D8 is last in row/box
4 in H7 is last in column
Passo 18
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 6 in H8 changed to solution
Passo 19
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 9 in C8 changed to solution
Passo 20
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 6 in C9 changed to solution
Last candidate 5 in F8 changed to solution
Passo 21
Hidden Singles
valore: 2.5
categoria doc: Getting_Started
5 in D3 is last in row/box
5 in J1 is last in column
Passo 22
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 1 in G3 changed to solution
Last candidate 4 in J6 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in B6 changed to solution
Last candidate 5 in G5 changed to solution
Last candidate 3 in H3 changed to solution
Passo 24
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in A5 changed to solution
Last candidate 9 in H4 changed to solution
Last candidate 1 in H6 changed to solution
Last candidate 6 in J3 changed to solution
Passo 25
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 1 in A2 changed to solution
Last candidate 7 in A4 changed to solution
Last candidate 8 in B3 changed to solution
Last candidate 2 in B5 changed to solution
Last candidate 8 in D6 changed to solution
Passo 26
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 9 in A1 changed to solution
Last candidate 5 in A6 changed to solution
Last candidate 6 in B2 changed to solution
Last candidate 4 in B4 changed to solution
Last candidate 9 in E3 changed to solution
Last candidate 7 in F6 changed to solution
Last candidate 3 in J5 changed to solution
Passo 27
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 3 in D2 changed to solution
Last candidate 1 in E9 changed to solution
Last candidate 2 in J4 changed to solution
Passo 28
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 6 in D4 changed to solution
Last candidate 9 in D9 changed to solution
Last candidate 6 in E1 changed to solution
Last candidate 8 in F2 changed to solution
Passo 29
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in D5 changed to solution
Last candidate 8 in E7 changed to solution
Last candidate 1 in F1 changed to solution
Last candidate 3 in F4 changed to solution
Last candidate 6 in F7 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in F5 changed to solution