Passi risolutivi (33)
Passo 1
Hidden Singles
valore: 5.4
categoria doc: Getting_Started
1 in B2 is last in row
1 in D5 is last in row/box
2 in C8 is last in column/box
3 in C3 is last in row
3 in G7 is last in column
6 in H2 is last in row/box
Passo 2
Hidden Pair
valore: 48.1
categoria doc: Hidden_Candidates
Hidden Pair 3/6 in Box 6, on cells {D8|F8}
- removes 4/8 from D8
- removes 7/8 from F8
Passo 3
Hidden Singles
valore: 4.7
categoria doc: Getting_Started
7 in F9 is last in row/box
7 in J8 is last in column
Passo 4
Hidden Pair
valore: 44.3
categoria doc: Hidden_Candidates
Hidden Pair 1/5 in Col 9, on cells {A9|G9}
- removes 4 from A9
- removes 4/8/9 from G9
Passo 5
Hidden Singles
valore: 4.3
categoria doc: Getting_Started
9 in G5 is last in row
9 in J7 is last in box
Passo 6
Hidden Singles
valore: 4
categoria doc: Getting_Started
9 in C2 is last in row
Passo 7
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
9 in F6 is last in row
Passo 8
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
3 in A6 is last in column
3 in D4 is last in box
3 in F8 is last in row
9 in B4 is last in row/column/box
Passo 9
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 6 in A4 changed to solution
Last candidate 6 in D8 changed to solution
Passo 10
Hidden Singles
valore: 2.9
categoria doc: Getting_Started
6 in C1 is last in row/box
6 in E3 is last in column
Passo 11
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 2 in F1 changed to solution
Passo 12
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 8 in F2 changed to solution
Passo 13
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 6 in F5 changed to solution
Passo 14
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
8 in D9 is last in row
9 in D3 is last in column/box
9 in E9 is last in row
Passo 15
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 4 in C9 changed to solution
Last candidate 4 in E7 changed to solution
Passo 16
Pointing Pairs
valore: 30.5
categoria doc: Intersection_Removal
Pair: between Box 8 and Row J:
- 2 can be removed from J3
Passo 17
Y-Wing
valore: 80.3
categoria doc: Y_Wing_Strategy
Y-Wing pattern. Hinge: H7 (1/8), wings G9 H4, therefore
- 5 can be removed from H8
Passo 18
Hidden Singles
valore: 2
categoria doc: Getting_Started
5 in H4 is last in row
Passo 19
Hidden Singles
valore: 1.8
categoria doc: Getting_Started
5 in E5 is last in row/column/box
Passo 20
Pointing Pairs
valore: 26
categoria doc: Intersection_Removal
Pair: between Box 9 and Row G:
- 5 can be removed from G1
- 5 can be removed from G2
- 5 can be removed from G3
Passo 21
Unique Rectangle Type 1
valore: 33.6
categoria doc: Unique_Rectangle
Uniqueness Type 1 removing 2/8 at J6 because of E6,E4,J4
Passo 22
Hidden Singles
valore: 1.6
categoria doc: Getting_Started
2 in E6 is last in column
2 in J4 is last in row/box
Passo 23
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 8 in E4 changed to solution
Passo 24
Rectangle Elimination
valore: 37.1
categoria doc: Rectangle_Elimination
If +4[J3] then -4[B3] forcing +4[B6] which removes all 4s from box 8, so J3 cannot be 4
Passo 25
W-Wing
valore: 36.5
categoria doc: W_Wings
W-Wing (single). Either there is a 5 in B8 or in J3. They are connected through 8 in G8/G3, therefore
- 5 can be removed from B3
Last candidate 4 in B3 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 8 in B6 changed to solution
Passo 27
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 5 in B8 changed to solution
Last candidate 7 in C5 changed to solution
Passo 28
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 4 in A5 changed to solution
Last candidate 1 in A9 changed to solution
Last candidate 8 in C7 changed to solution
Passo 29
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 7 in A7 changed to solution
Last candidate 5 in G9 changed to solution
Last candidate 1 in H7 changed to solution
Last candidate 8 in J5 changed to solution
Passo 30
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 4 in H6 changed to solution
Last candidate 5 in J3 changed to solution
Passo 31
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 2 in A3 changed to solution
Last candidate 8 in H8 changed to solution
Last candidate 1 in J6 changed to solution
Passo 32
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 5 in A2 changed to solution
Last candidate 8 in G3 changed to solution
Last candidate 4 in G8 changed to solution
Last candidate 4 in J1 changed to solution
Passo 33
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 5 in D1 changed to solution
Last candidate 4 in D2 changed to solution
Last candidate 1 in G1 changed to solution
Last candidate 2 in G2 changed to solution