Passi risolutivi (24)
Passo 1
Hidden Singles
valore: 5.5
categoria doc: Getting_Started
1 in D1 is last in row/box
1 in G3 is last in column
4 in H6 is last in column
6 in E3 is last in row/column/box
7 in B4 is last in column/box
8 in E7 is last in row/box
Passo 2
Hidden Singles
valore: 4.7
categoria doc: Getting_Started
3 in F3 is last in column
3 in G2 is last in box
5 in E2 is last in row
5 in F9 is last in box
Passo 3
Hidden Singles
valore: 4.1
categoria doc: Getting_Started
8 in C2 is last in column
8 in G1 is last in box
9 in F1 is last in box
Passo 4
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 2 in B1 changed to solution
Passo 5
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
7 in F2 is last in row
8 in B9 is last in column/box
Passo 6
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 2 in D2 changed to solution
Passo 7
Hidden Singles
valore: 3.2
categoria doc: Getting_Started
6 in B5 is last in row
Passo 8
Naked Pair
valore: 15.1
categoria doc: Naked_Candidates
Naked Pair 5/7 on cells {H1|H7} means
- 5 can be removed from H5
- 7 can be removed from H9
Last candidate 6 in H9 changed to solution
Passo 9
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 2 in C9 changed to solution
Passo 10
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 4 in G9 changed to solution
Passo 11
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 7 in D9 changed to solution
Passo 12
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
6 in C8 is last in row/column/box
6 in G4 is last in row/column/box
Passo 13
Pointing Pairs
valore: 35.5
categoria doc: Intersection_Removal
Pair: between Box 6 and Col 8:
- 2 can be removed from G8
Last candidate 9 in G8 changed to solution
Passo 14
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
9 in D7 is last in column/box
Passo 15
XY-Chain
valore: 154.7
categoria doc: XY_Chains
length=5, chain ends: B6 and J4
This proves 9 is the solution at one or possibly both ends of the chain
-9[B6]+3[B6]-3[B7]+4[B7]-4[A7]+1[A7]-1[A4]+2[A4]-2[J4]+9[J4]
- 9 can be removed from J6
Passo 16
3D Medusa
valore: 162.9
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 9 in C5 can see coloured 9 elsewhere and an oppositely coloured 1 in its own cell. It can be removed.
Passo 17
Hidden Singles
valore: 2
categoria doc: Getting_Started
9 in J5 is last in column
Passo 18
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 2 in J4 changed to solution
Passo 19
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 1 in A4 changed to solution
Last candidate 5 in G5 changed to solution
Passo 20
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 4 in A7 changed to solution
Last candidate 3 in C5 changed to solution
Last candidate 2 in G7 changed to solution
Last candidate 3 in H4 changed to solution
Last candidate 8 in J6 changed to solution
Passo 21
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 5 in A3 changed to solution
Last candidate 9 in B6 changed to solution
Last candidate 3 in B7 changed to solution
Last candidate 1 in C7 changed to solution
Last candidate 4 in D5 changed to solution
Last candidate 9 in E4 changed to solution
Last candidate 1 in H5 changed to solution
Passo 22
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 2 in A6 changed to solution
Last candidate 4 in B3 changed to solution
Last candidate 7 in C1 changed to solution
Last candidate 5 in C6 changed to solution
Last candidate 3 in D8 changed to solution
Last candidate 2 in F5 changed to solution
Last candidate 7 in J3 changed to solution
Passo 23
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 8 in A5 changed to solution
Last candidate 9 in C3 changed to solution
Last candidate 3 in E6 changed to solution
Last candidate 2 in E8 changed to solution
Last candidate 4 in F8 changed to solution
Last candidate 5 in H1 changed to solution
Last candidate 5 in J7 changed to solution
Passo 24
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in H7 changed to solution