Passi risolutivi (31)
Passo 1
Hidden Singles
valore: 5.8
categoria doc: Getting_Started
3 in H4 is last in column
8 in C7 is last in column
Passo 2
Hidden Singles
valore: 5.5
categoria doc: Getting_Started
8 in A5 is last in row/column/box
Passo 3
Hidden Pair
valore: 53.4
categoria doc: Hidden_Candidates
Hidden Pair 1/9 in Box 7, on cells {H3|J1}
- removes 2/6 from H3
- removes 6/8 from J1
Passo 4
Hidden Singles
valore: 5.2
categoria doc: Getting_Started
8 in J8 is last in row
Passo 5
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
1 in J1 is last in row
6 in J2 is last in row
Passo 6
Naked Singles
valore: 2.4
categoria doc: Getting_Started
Last candidate 9 in H3 changed to solution
Passo 7
Hidden Singles
valore: 4.7
categoria doc: Getting_Started
9 in A9 is last in row
9 in C1 is last in column/box
Passo 8
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 4 in C9 changed to solution
Passo 9
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 3 in C8 changed to solution
Passo 10
Hidden Singles
valore: 4.1
categoria doc: Getting_Started
3 in B5 is last in row/column/box
Passo 11
Hidden Pair
valore: 39.9
categoria doc: Hidden_Candidates
Hidden Pair 1/6 in Row A, on cells {A3|A8}
- removes 2 from A3
- removes 7 from A8
Passo 12
Hidden Pair
valore: 39.1
categoria doc: Hidden_Candidates
Hidden Pair 2/4 in Box 8, on cells {G5|H5}
- removes 5/7 from G5
- removes 7 from H5
Passo 13
Naked Pair
valore: 18.7
categoria doc: Naked_Candidates
Naked Pair 2/4 on cells {G5|H5} means
- 2 can be removed from C5
- 4 can be removed from D5
- 2/4 can be removed from E5
- 2/4 can be removed from F5
Last candidate 5 in C5 changed to solution
Passo 14
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 2 in C2 changed to solution
Passo 15
Naked Singles
valore: 1.6
categoria doc: Getting_Started
Last candidate 4 in A2 changed to solution
Last candidate 7 in H2 changed to solution
Passo 16
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 6 in B1 changed to solution
Last candidate 3 in G2 changed to solution
Passo 17
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 1 in A3 changed to solution
Last candidate 5 in E2 changed to solution
Passo 18
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 6 in A8 changed to solution
Last candidate 5 in B3 changed to solution
Passo 19
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
2 in H5 is last in row
4 in B6 is last in row/box
5 in G8 is last in column
Passo 20
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 4 in G5 changed to solution
Last candidate 7 in G9 changed to solution
Passo 21
Hidden Singles
valore: 2
categoria doc: Getting_Started
7 in B8 is last in column
Passo 22
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 1 in B7 changed to solution
Passo 23
Aligned Pair Exclusion
valore: 258
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 E6 / F6 reduced from 2/9->2/9 and 2/5/7->2/5
- Pair 2/7 found in ALS {A6}
Note: some ALSs share cells and cannot be fully colour indicated
Passo 24
XY-Chain
valore: 132
categoria doc: XY_Chains
length=5, chain ends: D3 and F9
This proves 6 is the solution at one or possibly both ends of the chain
-6[D3]+8[D3]-8[D1]+4[D1]-4[F1]+2[F1]-2[F6]+5[F6]-5[F9]+6[F9]
- 6 can be removed from D7
- 6 can be removed from D9
- 6 can be removed from F3
Passo 25
XY-Chain
valore: 110.9
categoria doc: XY_Chains
length=4, chain ends: D9 and F6
This proves 5 is the solution at one or possibly both ends of the chain
-5[D9]+1[D9]-1[E8]+4[E8]-4[E4]+2[E4]-2[F6]+5[F6]
- 5 can be removed from D4
- 5 can be removed from F9
Last candidate 6 in F9 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 7 in F5 changed to solution
Last candidate 1 in H9 changed to solution
Passo 27
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 4 in D4 changed to solution
Last candidate 5 in D9 changed to solution
Last candidate 4 in H8 changed to solution
Last candidate 9 in J5 changed to solution
Passo 28
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 8 in D1 changed to solution
Last candidate 7 in D7 changed to solution
Last candidate 2 in E4 changed to solution
Last candidate 1 in E8 changed to solution
Last candidate 6 in H7 changed to solution
Passo 29
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 7 in A4 changed to solution
Last candidate 6 in D3 changed to solution
Last candidate 6 in E5 changed to solution
Last candidate 9 in E6 changed to solution
Last candidate 5 in F6 changed to solution
Last candidate 2 in G1 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in A6 changed to solution
Last candidate 1 in D5 changed to solution
Last candidate 3 in E3 changed to solution
Last candidate 4 in F1 changed to solution
Last candidate 8 in G3 changed to solution
Last candidate 5 in J4 changed to solution
Last candidate 7 in J6 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 4 in E7 changed to solution
Last candidate 2 in F3 changed to solution
Last candidate 3 in F7 changed to solution