Passi risolutivi (24)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in H5 changed to solution
Passo 2
Hidden Singles
valore: 5.6
categoria doc: Getting_Started
1 in A3 is last in row/box
1 in G1 is last in column
4 in D8 is last in column/box
7 in C7 is last in column/box
7 in H6 is last in box
8 in A6 is last in column/box
9 in F2 is last in column/box
Passo 3
Hidden Singles
valore: 4.7
categoria doc: Getting_Started
1 in J8 is last in row/column/box
2 in G7 is last in column
6 in J6 is last in column
Passo 4
Hidden Singles
valore: 4.3
categoria doc: Getting_Started
3 in H8 is last in column
6 in D7 is last in column
Passo 5
Naked Pair
valore: 20.1
categoria doc: Naked_Candidates
Naked Pair 2/5 on cells {A2|H2} means
- 2/5 can be removed from B2
- 2/5 can be removed from C2
- 5 can be removed from J2
Passo 6
Pointing Pairs
valore: 59.4
categoria doc: Intersection_Removal
Triple: between Box 2 and Col 4:
- 2 can be removed from D4
- 2 can be removed from F4
Passo 7
Pointing Pairs
valore: 59
categoria doc: Intersection_Removal
Pair: between Box 2 and Col 5:
- 5 can be removed from E5
Passo 8
Pointing Pairs
valore: 58.6
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 3:
- 8 can be removed from B3
Passo 9
Line/Unit Reduction
valore: 76.5
categoria doc: Intersection_Removal
Line/Box Reduction: 4s in box 5 remove the following in the same box:
- 4 can be removed from E4
- 4 can be removed from E5
- 4 can be removed from F4
Passo 10
Line/Unit Reduction
valore: 75.4
categoria doc: Intersection_Removal
Line/Box Reduction: 5s in box 3 remove the following in the same box:
- 5 can be removed from B9
- 5 can be removed from C9
Passo 11
Line/Unit Reduction
valore: 74.3
categoria doc: Intersection_Removal
Line/Box Reduction: 8s in box 6 remove the following in the same box:
- 8 can be removed from E9
- 8 can be removed from F9
Passo 12
W-Wing
valore: 90.8
categoria doc: W_Wings
W-Wing (single). Either there is a 6 in A8 or in H9. They are connected through 5 in A2/H2, therefore
- 6 can be removed from B9
- 6 can be removed from C9
- 6 can be removed from G8
Passo 13
Rectangle Elimination
valore: 90.1
categoria doc: Rectangle_Elimination
If +9[G9] then -9[D9] forcing +9[D4] which removes all 9s from box 8, so G9 cannot be 9
Passo 14
Rectangle Elimination
valore: 89.4
categoria doc: Rectangle_Elimination
If +9[E7] then -9[E5] forcing +9[G5] which removes all 9s from box 9, so E7 cannot be 9
Passo 15
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
9 in J7 is last in column
Passo 16
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 8 in G8 changed to solution
Last candidate 4 in J4 changed to solution
Passo 17
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 9 in G5 changed to solution
Last candidate 6 in G9 changed to solution
Last candidate 3 in J2 changed to solution
Passo 18
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 8 in C2 changed to solution
Last candidate 3 in E5 changed to solution
Last candidate 7 in G3 changed to solution
Last candidate 5 in H9 changed to solution
Last candidate 5 in J3 changed to solution
Passo 19
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 7 in B2 changed to solution
Last candidate 5 in C5 changed to solution
Last candidate 8 in E3 changed to solution
Last candidate 1 in F4 changed to solution
Last candidate 4 in G2 changed to solution
Last candidate 2 in H2 changed to solution
Passo 20
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 5 in A2 changed to solution
Last candidate 4 in B5 changed to solution
Last candidate 5 in E7 changed to solution
Last candidate 3 in F9 changed to solution
Last candidate 6 in H1 changed to solution
Passo 21
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in A8 changed to solution
Last candidate 9 in D9 changed to solution
Last candidate 4 in E6 changed to solution
Last candidate 2 in F3 changed to solution
Last candidate 8 in F7 changed to solution
Passo 22
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 2 in A4 changed to solution
Last candidate 5 in B8 changed to solution
Last candidate 9 in C8 changed to solution
Last candidate 2 in C9 changed to solution
Last candidate 3 in D3 changed to solution
Last candidate 7 in D4 changed to solution
Last candidate 7 in E1 changed to solution
Last candidate 1 in E9 changed to solution
Last candidate 5 in F6 changed to solution
Passo 23
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 6 in B3 changed to solution
Last candidate 8 in B9 changed to solution
Last candidate 3 in C1 changed to solution
Last candidate 5 in D1 changed to solution
Last candidate 2 in D6 changed to solution
Last candidate 9 in E4 changed to solution
Last candidate 4 in F1 changed to solution
Passo 24
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in B1 changed to solution
Last candidate 3 in B4 changed to solution
Last candidate 6 in C4 changed to solution