Passi risolutivi (27)
Passo 1
Hidden Singles
valore: 5
categoria doc: Getting_Started
4 in J7 is last in column/box
5 in F9 is last in column/box
6 in D1 is last in row
8 in A6 is last in column
9 in B8 is last in box
9 in F1 is last in row/box
Passo 2
Naked Singles
valore: 2.2
categoria doc: Getting_Started
Last candidate 8 in E1 changed to solution
Passo 3
Hidden Singles
valore: 4
categoria doc: Getting_Started
2 in D2 is last in box
8 in F5 is last in row/column/box
9 in A2 is last in row/column/box
Passo 4
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
5 in D3 is last in row/box
Passo 5
Hidden Singles
valore: 3.7
categoria doc: Getting_Started
5 in H2 is last in box
Passo 6
Pointing Pairs
valore: 52.8
categoria doc: Intersection_Removal
Pair: between Box 7 and Row G:
- 3 can be removed from G4
- 3 can be removed from G6
- 3 can be removed from G8
Passo 7
Pointing Pairs
valore: 52
categoria doc: Intersection_Removal
Pair: between Box 5 and Col 4:
- 7 can be removed from H5
- 7 can be removed from J5
Passo 8
Line/Box Reduction
valore: 67.1
categoria doc: Intersection_Removal
Triple: between Row J and Box 8:
- 7 can be removed from G8
- 7 can be removed from G9
- 7 can be removed from J8
- 7 can be removed from J9
Passo 9
Rectangle Elimination
valore: 82.5
categoria doc: Rectangle_Elimination
If either +1[D7] or +1[C6] are ON then both are on because they are strongly linked through the hinge cell D6. If both are ON then this removes all 1s from box 3, so neither can be 1
Passo 10
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
1 in D6 is last in row/column
Passo 11
Rectangle Elimination
valore: 79.8
categoria doc: Rectangle_Elimination
If +4[A5] then -4[A3] forcing +4[F3] which removes all 4s from box 5, so A5 cannot be 4
Passo 12
Hidden Singles
valore: 3.2
categoria doc: Getting_Started
4 in E5 is last in column
Passo 13
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 1 in E2 changed to solution
Last candidate 3 in F4 changed to solution
Passo 14
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 7 in D5 changed to solution
Last candidate 4 in F3 changed to solution
Passo 15
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 3 in D7 changed to solution
Passo 16
Hidden Singles
valore: 2.5
categoria doc: Getting_Started
4 in A4 is last in row
4 in C2 is last in column/box
Passo 17
Hidden Singles
valore: 2.3
categoria doc: Getting_Started
4 in G6 is last in row/column/box
6 in A5 is last in row/box
6 in G4 is last in column
Passo 18
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 2 in G9 changed to solution
Last candidate 3 in H5 changed to solution
Passo 19
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 8 in G8 changed to solution
Last candidate 9 in H6 changed to solution
Last candidate 9 in J9 changed to solution
Passo 20
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 3 in G2 changed to solution
Last candidate 2 in J6 changed to solution
Last candidate 3 in J8 changed to solution
Passo 21
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 8 in B2 changed to solution
Last candidate 3 in C6 changed to solution
Last candidate 7 in G1 changed to solution
Last candidate 5 in J5 changed to solution
Passo 22
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 2 in A1 changed to solution
Last candidate 1 in B3 changed to solution
Last candidate 2 in B5 changed to solution
Last candidate 8 in J3 changed to solution
Last candidate 7 in J4 changed to solution
Passo 23
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 7 in A3 changed to solution
Last candidate 5 in B4 changed to solution
Last candidate 5 in C1 changed to solution
Passo 24
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 1 in A7 changed to solution
Last candidate 3 in B1 changed to solution
Last candidate 1 in C4 changed to solution
Passo 25
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 7 in C9 changed to solution
Last candidate 2 in F7 changed to solution
Last candidate 7 in H7 changed to solution
Passo 26
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 2 in C8 changed to solution
Last candidate 6 in E9 changed to solution
Last candidate 1 in F8 changed to solution
Passo 27
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in E8 changed to solution
Last candidate 6 in H8 changed to solution
Last candidate 1 in H9 changed to solution