Passi risolutivi (28)
Passo 1
Hidden Singles
valore: 5.3
categoria doc: Getting_Started
1 in C5 is last in row
2 in B2 is last in column
5 in C1 is last in row/column/box
5 in D5 is last in row
5 in E8 is last in column/box
5 in J3 is last in row/column/box
6 in D1 is last in row/box
Passo 2
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
1 in B3 is last in row/box
1 in E2 is last in column
3 in C6 is last in row/box
Passo 3
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
3 in H5 is last in row/box
Passo 4
Hidden Pair
valore: 39.9
categoria doc: Hidden_Candidates
Hidden Pair 4/6 in Box 3, on cells {A7|B7}
- removes 7/8/9 from A7
- removes 7/8/9 from B7
Passo 5
Hidden Singles
valore: 3.9
categoria doc: Getting_Started
9 in B8 is last in box
Passo 6
Naked Pair
valore: 19
categoria doc: Naked_Candidates
Naked Pair 4/6 on cells {A7|B7} means
- 6 can be removed from H7
- 6 can be removed from J7
Passo 7
Hidden Singles
valore: 3.7
categoria doc: Getting_Started
6 in J6 is last in row
Passo 8
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
6 in A7 is last in row
6 in B5 is last in column/box
Passo 9
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 4 in B7 changed to solution
Passo 10
Hidden Pair
valore: 32.7
categoria doc: Hidden_Candidates
Hidden Pair 1/3 in Col 4, on cells {D4|F4}
- removes 8/9 from D4
- removes 7/8/9 from F4
Passo 11
Hidden Singles
valore: 3.2
categoria doc: Getting_Started
9 in A4 is last in column
Passo 12
Naked Triple
valore: 60.5
categoria doc: Naked_Candidates
Naked Triple 2/7/8 on cells {H8|J7|J8} means
- 2/8 can be removed from G9
- 7/8 can be removed from H7
- 8 can be removed from H9
Passo 13
Hidden Singles
valore: 3
categoria doc: Getting_Started
2 in G4 is last in row
Passo 14
Rectangle Elimination
valore: 72.2
categoria doc: Rectangle_Elimination
If +4[H3] then -4[E3] forcing +4[E5] which removes all 4s from box 8, so H3 cannot be 4
Passo 15
Rectangle Elimination
valore: 71.5
categoria doc: Rectangle_Elimination
If +4[F6] then -4[F1] forcing +4[G1] which removes all 4s from box 8, so F6 cannot be 4
Passo 16
Hidden Singles
valore: 2.8
categoria doc: Getting_Started
4 in H6 is last in column
Passo 17
W-Wing
valore: 66.7
categoria doc: W_Wings
W-Wing (double) (a.k.a.Remote Pair Chain).
Either 7 is in B1 and 8 is in G5 or vice versa. They are connected through mutual pairs of 7/8 in B4/J4, therefore
- 7/8 can be removed from G1
Last candidate 4 in G1 changed to solution
Passo 18
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 8 in F1 changed to solution
Passo 19
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 7 in B1 changed to solution
Passo 20
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 8 in B4 changed to solution
Passo 21
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 7 in A6 changed to solution
Last candidate 7 in J4 changed to solution
Passo 22
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in F6 changed to solution
Last candidate 8 in G5 changed to solution
Passo 23
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 8 in D6 changed to solution
Last candidate 4 in E5 changed to solution
Last candidate 6 in G2 changed to solution
Passo 24
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 3 in E3 changed to solution
Last candidate 7 in F5 changed to solution
Last candidate 9 in G9 changed to solution
Last candidate 8 in H2 changed to solution
Passo 25
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 4 in A2 changed to solution
Last candidate 2 in D3 changed to solution
Last candidate 8 in E7 changed to solution
Last candidate 7 in G3 changed to solution
Last candidate 1 in H7 changed to solution
Last candidate 7 in H8 changed to solution
Passo 26
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 8 in A3 changed to solution
Last candidate 1 in D9 changed to solution
Last candidate 4 in F3 changed to solution
Last candidate 9 in H3 changed to solution
Last candidate 6 in H9 changed to solution
Last candidate 2 in J7 changed to solution
Passo 27
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 7 in C7 changed to solution
Last candidate 3 in D4 changed to solution
Last candidate 3 in F7 changed to solution
Last candidate 2 in F9 changed to solution
Last candidate 8 in J8 changed to solution
Passo 28
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 2 in C8 changed to solution
Last candidate 8 in C9 changed to solution
Last candidate 9 in D7 changed to solution
Last candidate 1 in F4 changed to solution