Passi risolutivi (32)
Passo 1
Hidden Singles
valore: 6.1
categoria doc: Getting_Started
5 in A4 is last in box
6 in A1 is last in row/box
6 in E2 is last in column
6 in G9 is last in row
Passo 2
Hidden Singles
valore: 5.7
categoria doc: Getting_Started
2 in A7 is last in row
Passo 3
Hidden Pair
valore: 54.2
categoria doc: Hidden_Candidates
Hidden Pair 4/6 in Box 8, on cells {J4|J6}
- removes 1/9 from J4
- removes 1/9 from J6
Passo 4
Naked Pair
valore: 27
categoria doc: Naked_Candidates
Naked Pair 4/6 on cells {J4|J6} means
- 4 can be removed from J3
Passo 5
Pointing Pairs
valore: 79.6
categoria doc: Intersection_Removal
Pair: between Box 8 and Row H:
- 1 can be removed from H1
- 1 can be removed from H7
- 1 can be removed from H8
Passo 6
Pointing Pairs
valore: 78.8
categoria doc: Intersection_Removal
Triple: between Box 4 and Col 1:
- 3 can be removed from G1
- 3 can be removed from H1
Passo 7
Hidden Singles
valore: 5.2
categoria doc: Getting_Started
3 in G2 is last in row
Passo 8
Pointing Pairs
valore: 77.2
categoria doc: Intersection_Removal
Triple: between Box 4 and Col 3:
- 5 can be removed from J3
Passo 9
Pointing Pairs
valore: 76.3
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 3:
- 8 can be removed from B3
- 8 can be removed from C3
Passo 10
Pointing Pairs
valore: 74.7
categoria doc: Intersection_Removal
Triple: between Box 8 and Row H:
- 9 can be removed from H1
- 9 can be removed from H2
- 9 can be removed from H7
- 9 can be removed from H8
Passo 11
Pointing Pairs
valore: 73.9
categoria doc: Intersection_Removal
Pair: between Box 9 and Row G:
- 9 can be removed from G1
- 9 can be removed from G3
Passo 12
Rectangle Elimination
valore: 122.4
categoria doc: Rectangle_Elimination
If +1[C9] then -1[C1] forcing +1[G1] which removes all 1s from Box 9, so C9 cannot be 1
Passo 13
XY-Chain
valore: 305.8
categoria doc: XY_Chains
length=4. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-8[A8]+9[A8]-9[G8]+1[G8]-1[J9]+5[J9]-5[H8]+8[H8]
- 9 can be removed from B8
- 9 can be removed from C8
- 1 can be removed from G7
- 5 can be removed from H7
- 8 can be removed from B8
- 8 can be removed from C8
- 8 can be removed from E8
Passo 14
Chute Remote Pair
valore: 116.9
categoria doc: Chute_Remote_Pairs
9 cannot be set in the yellow cells {B7,B8,B9} and with the Remote Pair in A6 and C2 it means:
- 8 can be removed from C6
Passo 15
XY-Chain
valore: 346.6
categoria doc: XY_Chains
length=5, chain ends: A8 and C2
This proves 8 is the solution at one or possibly both ends of the chain
-8[A8]+9[A8]-9[G8]+1[G8]-1[J9]+5[J9]-5[J2]+9[J2]-9[C2]+8[C2]
- 8 can be removed from C7
- 8 can be removed from C9
Passo 16
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
8 in C2 is last in row
Passo 17
3D Medusa
valore: 356.5
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 1 in B3 can see coloured 1 elsewhere and an oppositely coloured 2 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 1 in B9 can see coloured 1 elsewhere and an oppositely coloured 8 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 5 in E9 can see coloured 5 elsewhere and an oppositely coloured 8 in its own cell. It can be removed.
Passo 18
Hidden Singles
valore: 4.4
categoria doc: Getting_Started
1 in B8 is last in row
Passo 19
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 9 in G8 changed to solution
Passo 20
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 8 in A8 changed to solution
Last candidate 7 in G7 changed to solution
Passo 21
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 9 in A6 changed to solution
Last candidate 3 in B9 changed to solution
Last candidate 8 in H7 changed to solution
Last candidate 5 in H8 changed to solution
Passo 22
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 4 in B5 changed to solution
Last candidate 4 in C8 changed to solution
Last candidate 5 in C9 changed to solution
Last candidate 2 in H2 changed to solution
Last candidate 1 in J9 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in B2 changed to solution
Last candidate 7 in B4 changed to solution
Last candidate 9 in C7 changed to solution
Last candidate 3 in E8 changed to solution
Last candidate 2 in F9 changed to solution
Last candidate 7 in H1 changed to solution
Last candidate 9 in J3 changed to solution
Passo 24
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 2 in B3 changed to solution
Last candidate 8 in B6 changed to solution
Last candidate 1 in C1 changed to solution
Last candidate 3 in C6 changed to solution
Last candidate 8 in E9 changed to solution
Last candidate 5 in J2 changed to solution
Passo 25
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 7 in C3 changed to solution
Last candidate 4 in G1 changed to solution
Last candidate 1 in H6 changed to solution
Passo 26
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 4 in F6 changed to solution
Last candidate 1 in G3 changed to solution
Passo 27
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 5 in F3 changed to solution
Last candidate 6 in J6 changed to solution
Passo 28
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 2 in D6 changed to solution
Last candidate 4 in E3 changed to solution
Last candidate 1 in F7 changed to solution
Last candidate 4 in J4 changed to solution
Passo 29
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 3 in D1 changed to solution
Last candidate 8 in D3 changed to solution
Last candidate 7 in E6 changed to solution
Last candidate 5 in E7 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 6 in D4 changed to solution
Last candidate 5 in D5 changed to solution
Last candidate 4 in D7 changed to solution
Last candidate 9 in E5 changed to solution
Last candidate 9 in F1 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in E1 changed to solution
Last candidate 1 in E4 changed to solution
Last candidate 3 in F4 changed to solution
Last candidate 3 in H5 changed to solution
Passo 32
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in H4 changed to solution