Passi risolutivi (19)
Passo 1
Hidden Singles
valore: 5.6
categoria doc: Getting_Started
1 in B4 is last in row
2 in C9 is last in row/box
7 in B3 is last in column/box
Passo 2
Hidden Singles
valore: 4.8
categoria doc: Getting_Started
1 in E5 is last in column/box
5 in C8 is last in row/box
Passo 3
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 3 in E8 changed to solution
Last candidate 4 in A8 changed to solution
Passo 4
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 1 in A7 changed to solution
Last candidate 3 in A9 changed to solution
Passo 5
Hidden Singles
valore: 3.6
categoria doc: Getting_Started
1 in C2 is last in column
Passo 6
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
3 in G2 is last in column
Passo 7
Hidden Singles
valore: 3.4
categoria doc: Getting_Started
4 in J2 is last in column/box
Passo 8
Pointing Pairs
valore: 48.3
categoria doc: Intersection_Removal
Pair: between Box 7 and Row J:
- 6 can be removed from J4
- 6 can be removed from J5
Last candidate 7 in J5 changed to solution
Passo 9
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 4 in G5 changed to solution
Passo 10
Hidden Singles
valore: 2.8
categoria doc: Getting_Started
4 in C4 is last in row/box
7 in A6 is last in row/box
7 in E4 is last in column
7 in G9 is last in row/column/box
Passo 11
Y-Wing
valore: 102.3
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: J4 (2/9), wings G6 J9, therefore
- 5 can be removed from G7
Passo 12
Rectangle Elimination
valore: 63.3
categoria doc: Rectangle_Elimination
If +5[D7] then -5[D3] forcing +5[J3] which removes all 5s from box 9, so D7 cannot be 5
Last candidate 4 in D7 changed to solution
Passo 13
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
4 in F6 is last in row/column/box
Passo 14
Hidden Pair
valore: 22.8
categoria doc: Hidden_Candidates
Hidden Pair 1/8 in Row F, on cells {F1|F9}
- removes 3/9 from F1
- removes 9 from F9
Passo 15
Rectangle Elimination
valore: 55.7
categoria doc: Rectangle_Elimination
If either +9[F7] or +9[J3] are ON then both are on because they are strongly linked through the hinge cell F3. If both are ON then this removes all 9s from box 9, so neither can be 9
Last candidate 6 in F7 changed to solution
Passo 16
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 3 in F4 changed to solution
Last candidate 2 in D4 changed to solution
Last candidate 8 in D6 changed to solution
Last candidate 6 in E6 changed to solution
Last candidate 9 in F3 changed to solution
Last candidate 9 in J4 changed to solution
Last candidate 5 in J9 changed to solution
Passo 17
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 1 in D9 changed to solution
Last candidate 8 in F9 changed to solution
Last candidate 6 in H4 changed to solution
Last candidate 6 in J3 changed to solution
Last candidate 3 in C3 changed to solution
Last candidate 5 in D3 changed to solution
Last candidate 9 in E9 changed to solution
Last candidate 1 in F1 changed to solution
Last candidate 2 in J1 changed to solution
Passo 18
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 3 in D1 changed to solution
Last candidate 8 in E1 changed to solution
Last candidate 2 in E2 changed to solution
Last candidate 5 in E7 changed to solution
Last candidate 9 in H2 changed to solution
Last candidate 2 in H7 changed to solution
Last candidate 8 in A2 changed to solution
Last candidate 6 in A5 changed to solution
Last candidate 6 in C1 changed to solution
Last candidate 8 in C5 changed to solution
Last candidate 5 in G1 changed to solution
Last candidate 2 in G6 changed to solution
Last candidate 9 in G7 changed to solution
Last candidate 5 in H6 changed to solution
Passo 19
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in A1 changed to solution