Passi risolutivi (25)
Passo 1
Hidden Singles
valore: 5.9
categoria doc: Getting_Started
2 in E7 is last in row
2 in H6 is last in row/box
6 in B5 is last in column
7 in G9 is last in row
Passo 2
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 5 in H9 changed to solution
Passo 3
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
6 in G2 is last in row
6 in J9 is last in column/box
Passo 4
Hidden Pair
valore: 47.9
categoria doc: Hidden_Candidates
Hidden Pair 5/7 in Col 7, on cells {D7|F7}
- removes 3/9 from D7
- removes 3 from F7
Passo 5
Hidden Singles
valore: 4.7
categoria doc: Getting_Started
9 in D8 is last in box
Passo 6
Naked Pair
valore: 22.7
categoria doc: Naked_Candidates
Naked Pair 5/7 on cells {D7|F7} means
- 5 can be removed from F8
Passo 7
Naked Pair
valore: 22
categoria doc: Naked_Candidates
Naked Pair 3/4 on cells {F8|F9} means
- 4 can be removed from F3
- 3/4 can be removed from F4
- 3/4 can be removed from F6
Passo 8
Pointing Pairs
valore: 65.2
categoria doc: Intersection_Removal
Pair: between Box 4 and Row D:
- 4 can be removed from D4
- 4 can be removed from D6
Passo 9
Pointing Pairs
valore: 64.8
categoria doc: Intersection_Removal
Triple: between Box 7 and Row J:
- 5 can be removed from J4
Passo 10
Line/Unit Reduction
valore: 85.3
categoria doc: Intersection_Removal
Line/Box Reduction: 5s in box 5 remove the following in the same box:
- 5 can be removed from D4
- 5 can be removed from F4
Passo 11
Line/Unit Reduction
valore: 84.2
categoria doc: Intersection_Removal
Line/Box Reduction: 9s in box 8 remove the following in the same box:
- 9 can be removed from J4
- 9 can be removed from J6
Passo 12
Hidden Pair
valore: 41.3
categoria doc: Hidden_Candidates
Hidden Pair 5/9 in Col 4, on cells {E4|G4}
- removes 4 from E4
- removes 3/8 from G4
Passo 13
XY-Chain
valore: 384.2
categoria doc: XY_Chains
length=7. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-4[E5]+5[E5]-5[E4]+9[E4]-9[G4]+5[G4]-5[G5]+3[G5]-3[G8]+8[G8]-8[H8]+1[H8]-1[H5]+4[H5]
- 3 can be removed from G6
- 1 can be removed from H7
- 4 can be removed from C5
Last candidate 9 in H7 changed to solution
Passo 14
Chute Remote Pair
valore: 97.7
categoria doc: Chute_Remote_Pairs
1 cannot be set in the yellow cells {A1,A2,A3} and with the Remote Pair in B7 and C5 it means:
- 3 can be removed from B4
- 3 can be removed from C8
Passo 15
Simple Colouring
valore: 191.2
categoria doc: Singles_Chains
(RULE 7): Two candidates 1[B7] and 1[C5] with the same color can see each end of a Strong Link {B2-C2}, all of that colour can be removed
Last candidate 3 in B7 changed to solution
Last candidate 3 in C5 changed to solution
Last candidate 8 in H8 changed to solution
Passo 16
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 2 in A9 changed to solution
Last candidate 8 in B1 changed to solution
Last candidate 5 in G5 changed to solution
Last candidate 3 in G8 changed to solution
Last candidate 1 in J7 changed to solution
Passo 17
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 4 in B9 changed to solution
Last candidate 4 in E5 changed to solution
Last candidate 4 in F8 changed to solution
Last candidate 9 in G4 changed to solution
Passo 18
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 5 in E4 changed to solution
Last candidate 9 in E6 changed to solution
Last candidate 3 in F9 changed to solution
Last candidate 8 in G6 changed to solution
Last candidate 1 in H5 changed to solution
Passo 19
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
3 in A1 is last in row/column/box
8 in C4 is last in row/column/box
Passo 20
Hidden Singles
valore: 1.8
categoria doc: Getting_Started
2 in B4 is last in column/box
4 in C6 is last in row/box
4 in J4 is last in column
6 in A3 is last in row/box
6 in D1 is last in column
Passo 21
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 9 in B3 changed to solution
Last candidate 5 in J1 changed to solution
Last candidate 3 in J6 changed to solution
Passo 22
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 1 in B2 changed to solution
Last candidate 7 in C1 changed to solution
Last candidate 7 in D6 changed to solution
Last candidate 8 in J3 changed to solution
Passo 23
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 1 in A6 changed to solution
Last candidate 3 in D4 changed to solution
Last candidate 5 in D7 changed to solution
Last candidate 5 in F3 changed to solution
Last candidate 1 in F4 changed to solution
Last candidate 4 in H1 changed to solution
Last candidate 9 in J2 changed to solution
Passo 24
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in A4 changed to solution
Last candidate 5 in A8 changed to solution
Last candidate 2 in C3 changed to solution
Last candidate 2 in D2 changed to solution
Last candidate 8 in F2 changed to solution
Last candidate 6 in F6 changed to solution
Last candidate 7 in F7 changed to solution
Last candidate 7 in H3 changed to solution
Passo 25
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 5 in C2 changed to solution
Last candidate 1 in C8 changed to solution
Last candidate 4 in D3 changed to solution