Passi risolutivi (31)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 3 in D3 changed to solution
Last candidate 8 in G8 changed to solution
Passo 2
Naked Singles
valore: 2.8
categoria doc: Getting_Started
Last candidate 2 in D1 changed to solution
Last candidate 1 in E3 changed to solution
Last candidate 9 in H8 changed to solution
Passo 3
Naked Singles
valore: 2.5
categoria doc: Getting_Started
Last candidate 5 in D4 changed to solution
Last candidate 4 in E2 changed to solution
Last candidate 2 in J8 changed to solution
Passo 4
Naked Singles
valore: 2.2
categoria doc: Getting_Started
Last candidate 9 in D7 changed to solution
Last candidate 8 in E1 changed to solution
Passo 5
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 6 in D5 changed to solution
Passo 6
Hidden Singles
valore: 3.9
categoria doc: Getting_Started
8 in A5 is last in column
8 in F9 is last in row/column/box
8 in H4 is last in row/box
9 in J3 is last in row/box
Passo 7
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 5 in C3 changed to solution
Passo 8
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 7 in H3 changed to solution
Passo 9
Naked Pair
valore: 17.1
categoria doc: Naked_Candidates
Naked Pair 2/3 on cells {A4|A7} means
- 2/3 can be removed from A2
- 2/3 can be removed from A6
- 2 can be removed from A9
Passo 10
Naked Pair
valore: 16.5
categoria doc: Naked_Candidates
Naked Pair 2/3 on cells {A7|F7} means
- 2/3 can be removed from B7
- 2/3 can be removed from E7
Last candidate 5 in E7 changed to solution
Passo 11
Naked Pair
valore: 15.5
categoria doc: Naked_Candidates
Naked Pair 1/3 on cells {C1|C8} means
- 1/3 can be removed from C2
- 1/3 can be removed from C5
Passo 12
Pointing Pairs
valore: 46.2
categoria doc: Intersection_Removal
Pair: between Box 9 and Row G:
- 7 can be removed from G5
Passo 13
Rectangle Elimination
valore: 76.3
categoria doc: Rectangle_Elimination
If +2[E4] then -2[A4] forcing +2[A7] which removes all 2s from box 6, so E4 cannot be 2
Passo 14
Pointing Pairs
valore: 45.4
categoria doc: Intersection_Removal
Pair: between Box 5 and Col 6:
- 2 can be removed from B6
Passo 15
Y-Wing
valore: 118.8
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: E4 (3/7), wings F5 J4, therefore
- 4 can be removed from G5
- 4 can be removed from J5
Passo 16
Rectangle Elimination
valore: 73.6
categoria doc: Rectangle_Elimination
If +3[E4] then -3[A4] forcing +3[A7] which removes all 3s from box 6, so E4 cannot be 3
Last candidate 7 in E4 changed to solution
Passo 17
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 4 in J4 changed to solution
Passo 18
Hidden Singles
valore: 2.7
categoria doc: Getting_Started
7 in J5 is last in row/column/box
Passo 19
Naked Pair
valore: 12.9
categoria doc: Naked_Candidates
Naked Pair 2/3 on cells {A4|B4} means
- 3 can be removed from B5
- 3 can be removed from B6
Passo 20
Hidden Pair
valore: 25
categoria doc: Hidden_Candidates
Hidden Pair 1/5 in Col 5, on cells {B5|G5}
- removes 4/9 from B5
- removes 3 from G5
Passo 21
Hidden Singles
valore: 2.5
categoria doc: Getting_Started
3 in H6 is last in box
Passo 22
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 6 in H2 changed to solution
Passo 23
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
6 in A9 is last in row
6 in B1 is last in column/box
Passo 24
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 2 in E9 changed to solution
Passo 25
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 9 in E6 changed to solution
Last candidate 3 in F7 changed to solution
Passo 26
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 1 in A6 changed to solution
Last candidate 2 in A7 changed to solution
Last candidate 3 in E5 changed to solution
Last candidate 6 in E8 changed to solution
Last candidate 4 in F5 changed to solution
Passo 27
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 3 in A4 changed to solution
Last candidate 5 in B5 changed to solution
Last candidate 9 in C5 changed to solution
Last candidate 2 in F6 changed to solution
Last candidate 5 in J6 changed to solution
Passo 28
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 2 in B4 changed to solution
Last candidate 4 in B6 changed to solution
Last candidate 2 in C2 changed to solution
Last candidate 4 in C9 changed to solution
Last candidate 1 in G5 changed to solution
Last candidate 1 in J1 changed to solution
Passo 29
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 7 in B7 changed to solution
Last candidate 3 in C1 changed to solution
Last candidate 3 in G2 changed to solution
Last candidate 5 in H9 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 1 in B2 changed to solution
Last candidate 9 in B9 changed to solution
Last candidate 1 in C8 changed to solution
Last candidate 4 in G7 changed to solution
Last candidate 7 in G9 changed to solution
Last candidate 4 in H1 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 3 in B8 changed to solution
Last candidate 5 in G1 changed to solution