Passi risolutivi (31)
Passo 1
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
4 in B2 is last in row/column/box
4 in F1 is last in row/column/box
7 in A4 is last in row/box
7 in E7 is last in row/box
7 in H5 is last in column
7 in J9 is last in column
Passo 2
Naked Singles
valore: 2.4
categoria doc: Getting_Started
Last candidate 1 in H4 changed to solution
Passo 3
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
1 in D9 is last in column
Passo 4
Hidden Pair
valore: 42.4
categoria doc: Hidden_Candidates
Hidden Pair 1/2 in Box 4, on cells {E2|E3}
- removes 3/6/9 from E2
- removes 3/6/8/9 from E3
Passo 5
Pointing Pairs
valore: 63.1
categoria doc: Intersection_Removal
Triple: between Box 9 and Col 7:
- 2 can be removed from B7
Passo 6
Pointing Pairs
valore: 61.9
categoria doc: Intersection_Removal
Pair: between Box 5 and Col 5:
- 5 can be removed from B5
- 5 can be removed from C5
- 5 can be removed from G5
Passo 7
Hidden Singles
valore: 4
categoria doc: Getting_Started
5 in G6 is last in row/box
Passo 8
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
4 in G8 is last in row
4 in H6 is last in column/box
5 in A3 is last in row
Passo 9
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
1 in J8 is last in column/box
Passo 10
Hidden Singles
valore: 3.4
categoria doc: Getting_Started
1 in G1 is last in column
Passo 11
Pointing Pairs
valore: 50.3
categoria doc: Intersection_Removal
Pair: between Box 5 and Row E:
- 6 can be removed from E8
Passo 12
Naked Pair
valore: 16
categoria doc: Naked_Candidates
Naked Pair 8/9 on cells {E8|F9} means
- 8/9 can be removed from D7
- 8/9 can be removed from F7
- 8/9 can be removed from F8
Passo 13
Line/Box Reduction
valore: 62.7
categoria doc: Intersection_Removal
Triple: between Row E and Box 5:
- 3 can be removed from D5
- 3 can be removed from F5
Passo 14
Y-Wing
valore: 124.3
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: J1 (2/9), wings D1 G2, therefore
- 6 can be removed from D2
Passo 15
Rectangle Elimination
valore: 77
categoria doc: Rectangle_Elimination
If +8[E6] then -8[A6] forcing +8[A9] which removes all 8s from box 6, so E6 cannot be 8
Passo 16
Rectangle Elimination
valore: 76.3
categoria doc: Rectangle_Elimination
If +8[C5] then -8[C8] forcing +8[E8] which removes all 8s from box 5, so C5 cannot be 8
Passo 17
Hidden Pair
valore: 29.7
categoria doc: Hidden_Candidates
Hidden Pair 6/8 in Box 2, on cells {A6|C4}
- removes 2 from A6
- removes 3/5 from C4
Passo 18
Hidden Singles
valore: 2.9
categoria doc: Getting_Started
5 in B4 is last in column/box
5 in C8 is last in row
Passo 19
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 9 in B7 changed to solution
Last candidate 6 in F8 changed to solution
Passo 20
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 9 in H8 changed to solution
Passo 21
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 8 in E8 changed to solution
Passo 22
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 9 in F9 changed to solution
Passo 23
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
9 in D3 is last in column
9 in E5 is last in row
9 in J1 is last in row/box
Passo 24
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 6 in D1 changed to solution
Last candidate 3 in D2 changed to solution
Passo 25
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 2 in A1 changed to solution
Last candidate 5 in D7 changed to solution
Last candidate 8 in F3 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 8 in A9 changed to solution
Last candidate 8 in D5 changed to solution
Last candidate 5 in F5 changed to solution
Last candidate 3 in F7 changed to solution
Passo 27
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 6 in A6 changed to solution
Last candidate 2 in C9 changed to solution
Last candidate 2 in G5 changed to solution
Passo 28
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 8 in C4 changed to solution
Last candidate 3 in E6 changed to solution
Last candidate 6 in G2 changed to solution
Passo 29
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 2 in B6 changed to solution
Last candidate 1 in C2 changed to solution
Last candidate 6 in E4 changed to solution
Last candidate 8 in G7 changed to solution
Last candidate 2 in H3 changed to solution
Last candidate 3 in J4 changed to solution
Last candidate 8 in J6 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 3 in B3 changed to solution
Last candidate 3 in C5 changed to solution
Last candidate 2 in E2 changed to solution
Last candidate 1 in E3 changed to solution
Last candidate 6 in H7 changed to solution
Last candidate 2 in J7 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in B5 changed to solution
Last candidate 6 in C3 changed to solution