Passi risolutivi (22)
Passo 1
Hidden Singles
valore: 5
categoria doc: Getting_Started
1 in A3 is last in box
1 in J1 is last in column
5 in C8 is last in row/box
5 in G2 is last in row/box
6 in A9 is last in column
6 in H2 is last in row
6 in J7 is last in box
8 in E8 is last in column/box
Passo 2
Naked Singles
valore: 2.2
categoria doc: Getting_Started
Last candidate 5 in E1 changed to solution
Passo 3
Hidden Singles
valore: 4
categoria doc: Getting_Started
3 in G7 is last in column/box
3 in H5 is last in row
5 in D5 is last in row
5 in F9 is last in column/box
8 in D1 is last in column/box
Passo 4
Hidden Singles
valore: 3.6
categoria doc: Getting_Started
1 in F7 is last in column
8 in F5 is last in column
Passo 5
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 4 in E9 changed to solution
Last candidate 2 in D7 changed to solution
Passo 6
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
1 in E4 is last in row/column/box
Passo 7
Naked Pair
valore: 14.9
categoria doc: Naked_Candidates
Naked Pair 4/7 on cells {A7|C7} means
- 7 can be removed from A8
- 7 can be removed from B8
Passo 8
Hidden Pair
valore: 27.5
categoria doc: Hidden_Candidates
Hidden Pair 6/8 in Box 2, on cells {C4|C6}
- removes 2/4/7/9 from C4
- removes 2/4/7/9 from C6
Passo 9
Pointing Pairs
valore: 40.9
categoria doc: Intersection_Removal
Pair: between Box 1 and Row C:
- 4 can be removed from C7
Last candidate 7 in C7 changed to solution
Passo 10
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 4 in A7 changed to solution
Passo 11
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
4 in B5 is last in column
7 in B2 is last in box
Passo 12
Pointing Pairs
valore: 32.6
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 3:
- 9 can be removed from C3
- 9 can be removed from G3
- 9 can be removed from J3
Passo 13
Line/Unit Reduction
valore: 42.4
categoria doc: Intersection_Removal
Line/Box Reduction: 7s in box 8 remove the following in the same box:
- 7 can be removed from G6
- 7 can be removed from J5
Passo 14
Y-Wing
valore: 83.6
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: H1 (4/9), wings G3 H8, therefore
- 7 can be removed from G8
Passo 15
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
7 in H8 is last in column/box
Passo 16
Naked Pair
valore: 9.5
categoria doc: Naked_Candidates
Naked Pair 4/9 on cells {D4|H4} means
- 9 can be removed from F4
- 4/9 can be removed from G4
- 9 can be removed from J4
Passo 17
Naked Pair
valore: 9.4
categoria doc: Naked_Candidates
Naked Pair 1/9 on cells {G8|G9} means
- 9 can be removed from G6
Passo 18
Unique Rectangle Type 1
valore: 36.3
categoria doc: Unique_Rectangle
Uniqueness Type 1 removing 1/9 at B8 because of B9,G9,G8
Last candidate 2 in B8 changed to solution
Passo 19
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 9 in A8 changed to solution
Last candidate 9 in B6 changed to solution
Last candidate 1 in B9 changed to solution
Last candidate 1 in G8 changed to solution
Last candidate 9 in G9 changed to solution
Passo 20
Hidden Singles
valore: 1.3
categoria doc: Getting_Started
9 in D4 is last in box
9 in F3 is last in row
9 in J5 is last in column
Passo 21
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 3 in D3 changed to solution
Last candidate 4 in D6 changed to solution
Last candidate 2 in E2 changed to solution
Last candidate 7 in E5 changed to solution
Last candidate 3 in E6 changed to solution
Last candidate 8 in G6 changed to solution
Last candidate 9 in H1 changed to solution
Last candidate 3 in J2 changed to solution
Last candidate 7 in J3 changed to solution
Last candidate 2 in J4 changed to solution
Last candidate 2 in A5 changed to solution
Last candidate 7 in A6 changed to solution
Last candidate 4 in C1 changed to solution
Last candidate 9 in C2 changed to solution
Last candidate 2 in C3 changed to solution
Last candidate 6 in C6 changed to solution
Last candidate 6 in F4 changed to solution
Last candidate 2 in F6 changed to solution
Last candidate 4 in G3 changed to solution
Last candidate 7 in G4 changed to solution
Passo 22
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 8 in C4 changed to solution