Passi risolutivi (28)
Passo 1
Hidden Singles
valore: 6.1
categoria doc: Getting_Started
1 in E1 is last in row
2 in J5 is last in row/box
6 in B4 is last in column/box
Passo 2
Hidden Singles
valore: 5.6
categoria doc: Getting_Started
5 in B6 is last in row/box
5 in D4 is last in column
7 in H5 is last in column/box
Passo 3
Hidden Singles
valore: 5.2
categoria doc: Getting_Started
4 in A6 is last in box
Passo 4
Hidden Singles
valore: 5
categoria doc: Getting_Started
2 in C6 is last in column/box
Passo 5
Naked Pair
valore: 23.7
categoria doc: Naked_Candidates
Naked Pair 7/8 on cells {B7|C7} means
- 8 can be removed from A7
- 8 can be removed from A9
- 8 can be removed from B8
- 7/8 can be removed from B9
- 8 can be removed from E7
- 7 can be removed from F7
- 8 can be removed from J7
Passo 6
Naked Pair
valore: 22.8
categoria doc: Naked_Candidates
Naked Pair 2/3 on cells {B8|B9} means
- 2/3 can be removed from A9
- 3 can be removed from B1
- 2/3 can be removed from B2
- 3 can be removed from B5
Passo 7
Pointing Pairs
valore: 68.1
categoria doc: Intersection_Removal
Pair: between Box 4 and Row D:
- 2 can be removed from D9
Passo 8
Pointing Pairs
valore: 67.7
categoria doc: Intersection_Removal
Pair: between Box 2 and Col 5:
- 9 can be removed from E5
Passo 9
Rectangle Elimination
valore: 112.1
categoria doc: Rectangle_Elimination
If +3[A1] then -3[A5] forcing +3[E5] which removes all 3s from Box 4, so A1 cannot be 3
Passo 10
Rectangle Elimination
valore: 111.4
categoria doc: Rectangle_Elimination
If +3[E3] then -3[E5] forcing +3[A5] which removes all 3s from Box 1, so E3 cannot be 3
Passo 11
Unique Rectangle 2+
valore: 221.5
categoria doc: Unique_Rectangles
Uniqueness Type 5: removing 9 from A1 because if true it would create a Deadly Rectangle with A5 and B5
Last candidate 8 in A1 changed to solution
Passo 12
Hidden Unique Rectangle
valore: 431.9
categoria doc: Hidden_Unique_Rectangles
Type 2: removing 6 at G9 because of AG79 and one strong link on 1 between A7 and G7
Passo 13
Rectangle Elimination
valore: 107.3
categoria doc: Rectangle_Elimination
If +6[F7] then -6[F1] forcing +6[H1] which removes all 6s from Box 9, so F7 cannot be 6
Last candidate 9 in F7 changed to solution
Passo 14
Hidden Singles
valore: 4
categoria doc: Getting_Started
9 in D6 is last in box
Passo 15
Hidden Singles
valore: 3.7
categoria doc: Getting_Started
8 in D9 is last in row
8 in E5 is last in box
8 in H6 is last in column
Passo 16
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 9 in B5 changed to solution
Last candidate 6 in E8 changed to solution
Passo 17
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 3 in A5 changed to solution
Last candidate 2 in F8 changed to solution
Passo 18
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 3 in B8 changed to solution
Last candidate 8 in C4 changed to solution
Last candidate 7 in F9 changed to solution
Passo 19
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 2 in B9 changed to solution
Last candidate 7 in C7 changed to solution
Last candidate 9 in H8 changed to solution
Passo 20
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 8 in B7 changed to solution
Last candidate 3 in C3 changed to solution
Last candidate 8 in J8 changed to solution
Passo 21
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
3 in E2 is last in row
6 in F1 is last in row/box
9 in J1 is last in column
Passo 22
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 4 in H2 changed to solution
Passo 23
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 7 in B2 changed to solution
Last candidate 6 in G3 changed to solution
Last candidate 3 in H1 changed to solution
Passo 24
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 4 in B1 changed to solution
Last candidate 2 in D2 changed to solution
Last candidate 5 in H3 changed to solution
Last candidate 1 in H4 changed to solution
Passo 25
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 7 in D1 changed to solution
Last candidate 3 in F4 changed to solution
Last candidate 3 in G6 changed to solution
Last candidate 6 in H9 changed to solution
Last candidate 7 in J3 changed to solution
Passo 26
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 2 in A3 changed to solution
Last candidate 1 in A9 changed to solution
Last candidate 4 in D3 changed to solution
Last candidate 1 in F6 changed to solution
Last candidate 4 in J4 changed to solution
Passo 27
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 6 in A7 changed to solution
Last candidate 9 in E3 changed to solution
Last candidate 9 in G4 changed to solution
Last candidate 4 in G9 changed to solution
Last candidate 5 in J7 changed to solution
Passo 28
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 4 in E7 changed to solution
Last candidate 5 in E9 changed to solution
Last candidate 1 in G7 changed to solution
Last candidate 3 in J9 changed to solution