Passi risolutivi (39)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in E3 changed to solution
Passo 2
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 3 in F3 changed to solution
Passo 3
Naked Singles
valore: 2.8
categoria doc: Getting_Started
Last candidate 2 in D3 changed to solution
Passo 4
Naked Singles
valore: 2.7
categoria doc: Getting_Started
Last candidate 4 in G3 changed to solution
Passo 5
Naked Singles
valore: 2.6
categoria doc: Getting_Started
Last candidate 5 in C3 changed to solution
Passo 6
Hidden Singles
valore: 4.8
categoria doc: Getting_Started
3 in D4 is last in row/box
6 in B8 is last in column/box
6 in C6 is last in row
6 in E2 is last in row/box
6 in G5 is last in column
7 in E7 is last in row/box
Passo 7
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
6 in H1 is last in row/column/box
9 in F6 is last in box
Passo 8
Hidden Singles
valore: 4
categoria doc: Getting_Started
1 in E6 is last in column/box
Passo 9
Naked Pair
valore: 19.4
categoria doc: Naked_Candidates
Naked Pair 4/8 on cells {E8|F7} means
- 8 can be removed from D7
- 8 can be removed from D8
- 4/8 can be removed from F9
Last candidate 9 in D7 changed to solution
Passo 10
Pointing Pairs
valore: 56.1
categoria doc: Intersection_Removal
Pair: between Box 5 and Col 5:
- 5 can be removed from A5
- 5 can be removed from J5
Passo 11
Chute Remote Pair
valore: 92.8
categoria doc: Chute_Remote_Pairs
4 cannot be set in the yellow cells {G7,H7,J7} and with the Remote Pair in C9 and E8 it means:
- 8 can be removed from A8
Passo 12
Rectangle Elimination
valore: 92.2
categoria doc: Rectangle_Elimination
If +3[C2] then -3[H2] forcing +3[H8] which removes all 3s from Box 3, so C2 cannot be 3
Passo 13
Rectangle Elimination
valore: 91.5
categoria doc: Rectangle_Elimination
If +4[A8] then -4[A5] forcing +4[F5] which removes all 4s from Box 6, so A8 cannot be 4
Passo 14
Rectangle Elimination
valore: 90.8
categoria doc: Rectangle_Elimination
If +4[C4] then -4[C7] forcing +4[F7] which removes all 4s from Box 5, so C4 cannot be 4
Passo 15
Hidden Pair
valore: 35.2
categoria doc: Hidden_Candidates
Hidden Pair 4/7 in Box 2, on cells {A4|A5}
- removes 2/5/8 from A4
- removes 8 from A5
Passo 16
Hidden Singles
valore: 3.4
categoria doc: Getting_Started
5 in J4 is last in column
Passo 17
Naked Pair
valore: 16.5
categoria doc: Naked_Candidates
Naked Pair 4/7 on cells {A4|A5} means
- 4 can be removed from A1
- 4 can be removed from A9
Passo 18
3D Medusa
valore: 261.9
categoria doc: 3D_Medusa
(RULE 4): Uncoloured candidate 8 in J8 can see two different coloured candidates of 8 elsewhere.
Passo 19
3D Medusa
valore: 259.7
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 7 in J9 can see coloured 7 elsewhere and an oppositely coloured 4 in its own cell. It can be removed.
Passo 20
Hidden Unique Rectangle
valore: 321.9
categoria doc: Hidden_Unique_Rectangles
Type 1: removing 8 at B1 because of BC19 and two strong links on 4
Passo 21
WXYZ Wing
valore: 319.1
categoria doc: WXYZ_Wing
WXYZ Wing Type 1: The four cells {A1,B2,G1,J1} contain in total 2/3/8/9 with the hinge on A1.
Non-Restricted candidate 9 determines the 'wing' cells (in yellow) and one of those 9s must be true. Therefore...
- 9 can be removed from B1
Last candidate 4 in B1 changed to solution
Passo 22
WXYZ Wing
valore: 308.1
categoria doc: WXYZ_Wing
WXYZ Wing Type 1: The four cells {G7,F7,H8,J8} contain in total 3/4/8/9 with the hinge on G7.
Non-Restricted candidate 4 determines the 'wing' cells (in yellow) and one of those 4s must be true. Therefore...
- 4 can be removed from E8
Last candidate 8 in E8 changed to solution
Passo 23
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 4 in E4 changed to solution
Last candidate 4 in F7 changed to solution
Passo 24
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 7 in A4 changed to solution
Passo 25
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 4 in A5 changed to solution
Passo 26
Hidden Singles
valore: 2.5
categoria doc: Getting_Started
4 in C9 is last in row/box
4 in J8 is last in column
7 in G9 is last in row
7 in J5 is last in column/box
Passo 27
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
1 in F9 is last in column
1 in G8 is last in row/box
7 in H2 is last in row/column/box
Passo 28
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 5 in D8 changed to solution
Last candidate 8 in F2 changed to solution
Passo 29
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 9 in B2 changed to solution
Last candidate 1 in D1 changed to solution
Last candidate 8 in D5 changed to solution
Last candidate 5 in F5 changed to solution
Passo 30
Hidden Singles
valore: 1.4
categoria doc: Getting_Started
1 in C2 is last in row/column/box
3 in H8 is last in row
Passo 31
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 9 in A8 changed to solution
Last candidate 8 in G7 changed to solution
Passo 32
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 3 in C7 changed to solution
Passo 33
Hidden Singles
valore: 1
categoria doc: Getting_Started
8 in C4 is last in column
8 in J6 is last in row/box
Passo 34
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 5 in B6 changed to solution
Last candidate 2 in C1 changed to solution
Passo 35
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 3 in A2 changed to solution
Last candidate 2 in A6 changed to solution
Last candidate 8 in B9 changed to solution
Passo 36
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 8 in A1 changed to solution
Last candidate 5 in A9 changed to solution
Last candidate 3 in G6 changed to solution
Last candidate 2 in J2 changed to solution
Passo 37
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 9 in G1 changed to solution
Last candidate 9 in J9 changed to solution
Passo 38
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in G4 changed to solution
Last candidate 2 in H9 changed to solution
Last candidate 3 in J1 changed to solution
Passo 39
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in H4 changed to solution