Passi risolutivi (31)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in C5 changed to solution
Passo 2
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
2 in C1 is last in row/box
2 in E3 is last in column
7 in C4 is last in row/box
9 in A7 is last in box
9 in B4 is last in row
Passo 3
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 8 in A5 changed to solution
Passo 4
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
2 in D9 is last in column/box
8 in G6 is last in row/box
9 in D2 is last in row
9 in E5 is last in column/box
Passo 5
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 4 in D6 changed to solution
Passo 6
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 5 in D8 changed to solution
Passo 7
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 3 in D7 changed to solution
Passo 8
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 8 in D4 changed to solution
Passo 9
Hidden Singles
valore: 3.2
categoria doc: Getting_Started
8 in E9 is last in column/box
Passo 10
Naked Pair
valore: 15.5
categoria doc: Naked_Candidates
Naked Pair 5/6 on cells {A6|B6} means
- 5 can be removed from H6
Passo 11
Naked Pair
valore: 15.3
categoria doc: Naked_Candidates
Naked Pair 3/4 on cells {G5|J5} means
- 3 can be removed from H4
- 3 can be removed from J4
Passo 12
Hidden Pair
valore: 29.7
categoria doc: Hidden_Candidates
Hidden Pair 1/9 in Col 8, on cells {G8|H8}
- removes 4/7 from G8
- removes 4 from H8
Passo 13
Naked Pair
valore: 14.4
categoria doc: Naked_Candidates
Naked Pair 1/9 on cells {G8|H8} means
- 1 can be removed from G9
- 1 can be removed from H9
- 1 can be removed from J9
Passo 14
Pointing Pairs
valore: 42.5
categoria doc: Intersection_Removal
Triple: between Box 3 and Col 9:
- 5 can be removed from H9
- 5 can be removed from J9
Passo 15
Pointing Pairs
valore: 41.7
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 1:
- 6 can be removed from A1
- 6 can be removed from B1
Passo 16
Line/Unit Reduction
valore: 54.5
categoria doc: Intersection_Removal
Line/Box Reduction: 6s in box 3 remove the following in the same box:
- 6 can be removed from A9
- 6 can be removed from B9
Passo 17
XYZ Wing
valore: 161.8
categoria doc: XYZ_Wing
XYZ-Wing pattern. Hinge: G2 (1/3/4), wings G5 J3, therefore
- 3 can be removed from G1
Passo 18
XY-Chain
valore: 226.8
categoria doc: XY_Chains
length=6, chain ends: A1 and F4
This proves 3 is the solution at one or possibly both ends of the chain
-3[A1]+5[A1]-5[C2]+4[C2]-4[C8]+6[C8]-6[F8]+7[F8]-7[F6]+2[F6]-2[F4]+3[F4]
- 3 can be removed from F1
Passo 19
XY-Chain
valore: 198.1
categoria doc: XY_Chains
length=5, chain ends: C8 and F1
This proves 6 is the solution at one or possibly both ends of the chain
-6[C8]+4[C8]-4[C2]+5[C2]-5[E2]+3[E2]-3[F2]+8[F2]-8[F1]+6[F1]
- 6 can be removed from F8
Last candidate 7 in F8 changed to solution
Passo 20
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 2 in F6 changed to solution
Passo 21
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 3 in F4 changed to solution
Last candidate 1 in H6 changed to solution
Passo 22
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 1 in E4 changed to solution
Last candidate 7 in E6 changed to solution
Last candidate 8 in F2 changed to solution
Last candidate 9 in H8 changed to solution
Last candidate 5 in J4 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 6 in F1 changed to solution
Last candidate 1 in G8 changed to solution
Last candidate 2 in H4 changed to solution
Passo 24
Hidden Singles
valore: 1.6
categoria doc: Getting_Started
1 in B2 is last in column
1 in J3 is last in row/box
5 in H7 is last in row/column/box
8 in B1 is last in row/column/box
9 in G1 is last in row/column/box
Passo 25
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in B3 changed to solution
Passo 26
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 3 in A3 changed to solution
Last candidate 5 in B6 changed to solution
Passo 27
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 5 in A1 changed to solution
Last candidate 6 in A6 changed to solution
Last candidate 4 in B9 changed to solution
Passo 28
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 1 in A9 changed to solution
Last candidate 4 in C2 changed to solution
Last candidate 6 in C8 changed to solution
Last candidate 3 in E1 changed to solution
Last candidate 3 in H9 changed to solution
Passo 29
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 5 in C9 changed to solution
Last candidate 5 in E2 changed to solution
Last candidate 4 in E8 changed to solution
Last candidate 3 in G2 changed to solution
Last candidate 7 in G9 changed to solution
Last candidate 4 in H1 changed to solution
Passo 30
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 6 in E7 changed to solution
Last candidate 4 in G5 changed to solution
Last candidate 7 in J1 changed to solution
Last candidate 6 in J9 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 3 in J5 changed to solution
Last candidate 4 in J7 changed to solution