Passi risolutivi (30)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 1 in A1 changed to solution
Passo 2
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 2 in B1 changed to solution
Passo 3
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
1 in B4 is last in row/column/box
2 in E5 is last in column/box
4 in A5 is last in row/box
7 in A9 is last in column/box
8 in H2 is last in row/box
Passo 4
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
6 in F9 is last in column
Passo 5
Hidden Singles
valore: 4.5
categoria doc: Getting_Started
8 in E9 is last in column
Passo 6
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 3 in E1 changed to solution
Passo 7
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 7 in J1 changed to solution
Passo 8
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 8 in D1 changed to solution
Passo 9
Hidden Singles
valore: 3.9
categoria doc: Getting_Started
8 in F6 is last in row/box
Passo 10
Naked Pair
valore: 18.4
categoria doc: Naked_Candidates
Naked Pair 5/9 on cells {H5|J5} means
- 5 can be removed from B5
- 5 can be removed from C5
- 9 can be removed from G5
- 5 can be removed from H4
- 5 can be removed from H6
Last candidate 4 in H4 changed to solution
Passo 11
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 3 in H6 changed to solution
Passo 12
Pointing Pairs
valore: 49.5
categoria doc: Intersection_Removal
Pair: between Box 9 and Col 8:
- 4 can be removed from D8
- 4 can be removed from E8
- 4 can be removed from F8
Last candidate 1 in E8 changed to solution
Passo 13
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
1 in H7 is last in column/box
Passo 14
Hidden Singles
valore: 2.9
categoria doc: Getting_Started
5 in H5 is last in row
5 in J8 is last in box
Passo 15
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 9 in J5 changed to solution
Passo 16
Hidden Singles
valore: 2.6
categoria doc: Getting_Started
4 in G8 is last in column/box
Passo 17
W-Wing
valore: 60.5
categoria doc: W_Wings
W-Wing (single). Either there is a 6 in B6 or in C2. They are connected through 5 in E6/E2, therefore
- 6 can be removed from C4
- 6 can be removed from C5
Passo 18
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
6 in D4 is last in column
Passo 19
Pointing Pairs
valore: 34.7
categoria doc: Intersection_Removal
Pair: between Box 2 and Row B:
- 6 can be removed from B8
Passo 20
Rectangle Elimination
valore: 57.1
categoria doc: Rectangle_Elimination
If +5[B6] then -5[B3] forcing +5[F3] which removes all 5s from Box 5, so B6 cannot be 5
Last candidate 6 in B6 changed to solution
Passo 21
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 8 in B5 changed to solution
Last candidate 7 in G6 changed to solution
Passo 22
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 7 in C5 changed to solution
Last candidate 4 in D6 changed to solution
Last candidate 6 in G5 changed to solution
Passo 23
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 5 in C4 changed to solution
Last candidate 5 in E6 changed to solution
Passo 24
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 6 in C2 changed to solution
Last candidate 2 in C7 changed to solution
Last candidate 4 in E2 changed to solution
Last candidate 7 in F4 changed to solution
Passo 25
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 8 in C8 changed to solution
Last candidate 9 in D7 changed to solution
Passo 26
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 5 in A7 changed to solution
Last candidate 2 in D8 changed to solution
Passo 27
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 3 in B7 changed to solution
Last candidate 1 in D2 changed to solution
Last candidate 3 in F8 changed to solution
Passo 28
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 6 in A8 changed to solution
Last candidate 5 in B3 changed to solution
Last candidate 9 in B8 changed to solution
Last candidate 7 in D3 changed to solution
Last candidate 4 in F7 changed to solution
Last candidate 3 in G2 changed to solution
Passo 29
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 2 in F3 changed to solution
Last candidate 9 in G9 changed to solution
Last candidate 2 in J2 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 5 in F2 changed to solution
Last candidate 1 in G3 changed to solution
Last candidate 9 in H3 changed to solution
Last candidate 2 in H9 changed to solution
Last candidate 4 in J3 changed to solution
Last candidate 3 in J9 changed to solution