Passi risolutivi (31)
Passo 1
Hidden Singles
valore: 5.9
categoria doc: Getting_Started
3 in C8 is last in row/column/box
3 in J1 is last in row/box
6 in J3 is last in row
Passo 2
Naked Pair
valore: 27.2
categoria doc: Naked_Candidates
Naked Pair 4/5 on cells {D8|D9} means
- 4/5 can be removed from D4
- 5 can be removed from D5
- 4/5 can be removed from D6
- 4/5 can be removed from D7
- 5 can be removed from E7
- 4/5 can be removed from F8
Last candidate 6 in D7 changed to solution
Passo 3
Hidden Singles
valore: 5.2
categoria doc: Getting_Started
6 in F2 is last in column/box
Passo 4
Hidden Singles
valore: 4.9
categoria doc: Getting_Started
3 in D2 is last in column/box
3 in F6 is last in row
6 in E5 is last in column
Passo 5
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
4 in F4 is last in row/box
7 in E3 is last in box
Passo 6
Hidden Singles
valore: 4.3
categoria doc: Getting_Started
8 in F8 is last in row
Passo 7
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 1 in E7 changed to solution
Passo 8
Hidden Singles
valore: 3.9
categoria doc: Getting_Started
1 in F5 is last in row/box
8 in G7 is last in row/column/box
Passo 9
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 5 in H5 changed to solution
Passo 10
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
9 in G9 is last in box
Passo 11
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
5 in G8 is last in row/box
Passo 12
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 4 in D8 changed to solution
Passo 13
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 5 in D9 changed to solution
Passo 14
Hidden Singles
valore: 2.8
categoria doc: Getting_Started
2 in G3 is last in row
2 in H8 is last in box
4 in B7 is last in row
Passo 15
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 7 in J7 changed to solution
Passo 16
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 1 in J8 changed to solution
Passo 17
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 7 in B8 changed to solution
Last candidate 4 in J9 changed to solution
Passo 18
Naked Pair
valore: 11
categoria doc: Naked_Candidates
Naked Pair 2/9 on cells {B2|B5} means
- 9 can be removed from B4
- 2 can be removed from B6
Passo 19
Naked Pair
valore: 10.2
categoria doc: Naked_Candidates
Naked Pair 1/5 on cells {B4|B6} means
- 1/5 can be removed from A6
- 1/5 can be removed from C4
- 1/5 can be removed from C6
Passo 20
XY-Chain
valore: 150.6
categoria doc: XY_Chains
length=5, chain ends: D6 and H2
This proves 7 is the solution at one or possibly both ends of the chain
-7[D6]+2[D6]-2[D5]+9[D5]-9[B5]+2[B5]-2[B2]+9[B2]-9[H2]+7[H2]
- 7 can be removed from H6
Passo 21
Aligned Pair Exclusion
valore: 277.3
categoria doc: Aligned_Pair_Exclusion
Some solution combinations in the two gray cells would empty at least one of the coloured cells. Removing those combinations create eliminations in the gray cells.
Pair A1 / A3 reduced from 5/7/9->5/7/9 and 1/5/9->1/5
- Pair 5/9 found in ALS {A7}
- Combinations of 2/7/8/9 found in ALS {A2,B2,C2}
Passo 22
XY-Chain
valore: 196.4
categoria doc: XY_Chains
length=8. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-5[A3]+1[A3]-1[A9]+2[A9]-2[A6]+8[A6]-8[E6]+5[E6]-5[B6]+1[B6]-1[H6]+4[H6]-4[H3]+9[H3]-9[F3]+5[F3]
- 2 can be removed from A2
- 8 can be removed from C6
- 9 can be removed from C3
- 5 can be removed from C3
Passo 23
W-Wing
valore: 46.1
categoria doc: W_Wings
W-Wing (single). Either there is a 9 in A7 or in F1. They are connected through 5 in A3/F3, therefore
- 9 can be removed from A1
Passo 24
XY-Chain
valore: 116.2
categoria doc: XY_Chains
length=4, chain ends: A1 and F3
This proves 5 is the solution at one or possibly both ends of the chain
-5[A1]+7[A1]-7[G1]+4[G1]-4[H3]+9[H3]-9[F3]+5[F3]
- 5 can be removed from A3
- 5 can be removed from F1
Last candidate 1 in A3 changed to solution
Last candidate 9 in F1 changed to solution
Passo 25
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 2 in A9 changed to solution
Last candidate 4 in C3 changed to solution
Last candidate 5 in F3 changed to solution
Passo 26
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 8 in A6 changed to solution
Last candidate 5 in C1 changed to solution
Last candidate 1 in C9 changed to solution
Last candidate 9 in H3 changed to solution
Passo 27
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 7 in A1 changed to solution
Last candidate 9 in C7 changed to solution
Last candidate 5 in E6 changed to solution
Last candidate 7 in H2 changed to solution
Passo 28
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 5 in A7 changed to solution
Last candidate 1 in B6 changed to solution
Last candidate 6 in C4 changed to solution
Last candidate 8 in E4 changed to solution
Last candidate 4 in G1 changed to solution
Last candidate 1 in H4 changed to solution
Passo 29
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 2 in B2 changed to solution
Last candidate 5 in B4 changed to solution
Last candidate 2 in C6 changed to solution
Last candidate 7 in G4 changed to solution
Last candidate 4 in H6 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in B5 changed to solution
Last candidate 8 in C2 changed to solution
Last candidate 9 in D4 changed to solution
Last candidate 7 in D6 changed to solution
Last candidate 6 in G6 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in D5 changed to solution