Passi risolutivi (31)
Passo 1
Hidden Singles
valore: 5.8
categoria doc: Getting_Started
1 in E5 is last in column/box
2 in H6 is last in column/box
5 in J8 is last in box
9 in F8 is last in row/box
9 in J3 is last in row
Passo 2
Hidden Singles
valore: 4.9
categoria doc: Getting_Started
2 in J9 is last in row/box
6 in E8 is last in box
9 in A9 is last in row
9 in B6 is last in column
9 in H4 is last in row/box
Passo 3
Hidden Singles
valore: 4.4
categoria doc: Getting_Started
6 in A5 is last in box
6 in G6 is last in column
Passo 4
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 4 in J5 changed to solution
Passo 5
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 8 in G5 changed to solution
Passo 6
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 3 in C5 changed to solution
Last candidate 7 in G4 changed to solution
Passo 7
Hidden Singles
valore: 3.6
categoria doc: Getting_Started
6 in H9 is last in column/box
Passo 8
Hidden Singles
valore: 3.4
categoria doc: Getting_Started
6 in B3 is last in column
Passo 9
Naked Pair
valore: 16.2
categoria doc: Naked_Candidates
Naked Pair 6/7 on cells {J1|J2} means
- 7 can be removed from H1
- 7 can be removed from H2
- 7 can be removed from H3
Passo 10
Hidden Pair
valore: 31.6
categoria doc: Hidden_Candidates
Hidden Pair 1/8 in Box 7, on cells {H1|H2}
- removes 4 from H1
- removes 3/4 from H2
Passo 11
Pointing Pairs
valore: 46.6
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 2:
- 2 can be removed from A2
- 2 can be removed from B2
Passo 12
Pointing Pairs
valore: 45.4
categoria doc: Intersection_Removal
Pair: between Box 6 and Col 7:
- 3 can be removed from A7
- 3 can be removed from B7
- 3 can be removed from H7
Last candidate 7 in H7 changed to solution
Passo 13
Pointing Pairs
valore: 43.7
categoria doc: Intersection_Removal
Pair: between Box 6 and Row D:
- 8 can be removed from D6
Passo 14
Naked Pair
valore: 14.3
categoria doc: Naked_Candidates
Naked Pair 5/7 on cells {D3|D6} means
- 5/7 can be removed from D2
Passo 15
Rectangle Elimination
valore: 70.8
categoria doc: Rectangle_Elimination
If +5[F1] then -5[C1] forcing +5[C6] which removes all 5s from Box 5, so F1 cannot be 5
Passo 16
Simple Colouring
valore: 137.6
categoria doc: Singles_Chains
(RULE 7): Two candidates 5[A3] and 5[D6] with the same color can see each end of a Strong Link {C1-C6}, all of that colour can be removed
Last candidate 7 in D6 changed to solution
Passo 17
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 5 in D3 changed to solution
Passo 18
XY-Chain
valore: 169.9
categoria doc: XY_Chains
length=4, chain ends: D9 and C6
This proves 8 is the solution at one or possibly both ends of the chain
-8[D9]+1[D9]-1[F7]+3[F7]-3[F6]+5[F6]-5[C6]+8[C6]
- 8 can be removed from C9
Last candidate 4 in C9 changed to solution
Passo 19
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 3 in G9 changed to solution
Passo 20
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 4 in H8 changed to solution
Passo 21
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 3 in H3 changed to solution
Passo 22
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 7 in A3 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 4 in E3 changed to solution
Passo 24
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 8 in E4 changed to solution
Passo 25
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 5 in B4 changed to solution
Last candidate 3 in E6 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 8 in C6 changed to solution
Last candidate 2 in E7 changed to solution
Last candidate 4 in F4 changed to solution
Last candidate 5 in F6 changed to solution
Passo 27
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 5 in A7 changed to solution
Last candidate 1 in B7 changed to solution
Last candidate 5 in C1 changed to solution
Last candidate 7 in C8 changed to solution
Last candidate 8 in D8 changed to solution
Last candidate 7 in E2 changed to solution
Passo 28
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 8 in B9 changed to solution
Last candidate 1 in D9 changed to solution
Last candidate 3 in F7 changed to solution
Last candidate 4 in G1 changed to solution
Last candidate 6 in J2 changed to solution
Passo 29
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 2 in B1 changed to solution
Last candidate 2 in D2 changed to solution
Last candidate 1 in F2 changed to solution
Last candidate 5 in G2 changed to solution
Last candidate 7 in J1 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 8 in A1 changed to solution
Last candidate 3 in B8 changed to solution
Last candidate 6 in F1 changed to solution
Last candidate 8 in H2 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 3 in A2 changed to solution
Last candidate 2 in A8 changed to solution
Last candidate 4 in B2 changed to solution
Last candidate 1 in H1 changed to solution