Passi risolutivi (30)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 9 in E3 changed to solution
Passo 2
Naked Singles
valore: 2.8
categoria doc: Getting_Started
Last candidate 4 in E5 changed to solution
Passo 3
Naked Singles
valore: 2.7
categoria doc: Getting_Started
Last candidate 1 in E7 changed to solution
Passo 4
Hidden Singles
valore: 4.7
categoria doc: Getting_Started
1 in B9 is last in column
1 in D2 is last in column/box
1 in F4 is last in row
1 in H8 is last in row/box
5 in A6 is last in box
5 in H5 is last in column
9 in J6 is last in row/box
Passo 5
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
6 in B5 is last in column
7 in D4 is last in column/box
7 in J9 is last in column
Passo 6
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 2 in D1 changed to solution
Passo 7
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 5 in D3 changed to solution
Passo 8
Hidden Singles
valore: 3.4
categoria doc: Getting_Started
2 in B4 is last in column
2 in F6 is last in row/box
Passo 9
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
3 in D6 is last in column/box
Passo 10
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
3 in F9 is last in column
Passo 11
Hidden Pair
valore: 29.2
categoria doc: Hidden_Candidates
Hidden Pair 3/7 in Box 3, on cells {A7|B7}
- removes 4/8/9 from A7
- removes 4/8/9 from B7
Passo 12
Pointing Pairs
valore: 43.3
categoria doc: Intersection_Removal
Pair: between Box 3 and Col 8:
- 9 can be removed from F8
Passo 13
XY-Chain
valore: 180.6
categoria doc: XY_Chains
length=4. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-4[C1]+6[C1]-6[C2]+8[C2]-8[G2]+9[G2]-9[G1]+4[G1]-4[C1]
- 8 can be removed from B2
- 8 can be removed from H2
- 4 can be removed from A1
- 4 can be removed from H1
Passo 14
Chute Remote Pair
valore: 68.8
categoria doc: Chute_Remote_Pairs
6 cannot be set in the yellow cells {A3,B3,C3} and with the Remote Pair in F1 and H2 it means:
- 7 can be removed from H1
Passo 15
Rectangle Elimination
valore: 68.1
categoria doc: Rectangle_Elimination
If +4[C7] then -4[C1] forcing +4[G1] which removes all 4s from box 9, so C7 cannot be 4
Passo 16
Rectangle Elimination
valore: 67.4
categoria doc: Rectangle_Elimination
If +4[G8] then -4[G1] forcing +4[C1] which removes all 4s from box 3, so G8 cannot be 4
Passo 17
Line/Unit Reduction
valore: 53.4
categoria doc: Intersection_Removal
Line/Box Reduction: 4s in box 3 remove the following in the same box:
- 4 can be removed from C9
Passo 18
Chute Remote Pair
valore: 64
categoria doc: Chute_Remote_Pairs
5 cannot be set in the yellow cells {G7,H7,J7} and with the Remote Pair in C9 and F8 it means:
- 8 can be removed from A8
- 8 can be removed from B8
- 8 can be removed from C8
- 8 can be removed from D9
Last candidate 4 in D9 changed to solution
Passo 19
Naked Pair
valore: 12.2
categoria doc: Naked_Candidates
Naked Pair 4/9 on cells {A8|B8} means
- 4 can be removed from C8
Passo 20
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
4 in C1 is last in row
Passo 21
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 9 in G1 changed to solution
Passo 22
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 8 in G2 changed to solution
Passo 23
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 6 in C2 changed to solution
Last candidate 5 in G9 changed to solution
Passo 24
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 8 in C9 changed to solution
Last candidate 2 in G8 changed to solution
Last candidate 7 in H2 changed to solution
Passo 25
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 9 in B2 changed to solution
Last candidate 5 in C8 changed to solution
Last candidate 4 in G3 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 4 in B8 changed to solution
Last candidate 2 in C7 changed to solution
Last candidate 8 in F8 changed to solution
Last candidate 6 in J3 changed to solution
Passo 27
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 9 in A8 changed to solution
Last candidate 8 in B6 changed to solution
Last candidate 9 in D7 changed to solution
Last candidate 7 in F3 changed to solution
Last candidate 9 in F5 changed to solution
Last candidate 3 in H1 changed to solution
Passo 28
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 7 in A1 changed to solution
Last candidate 4 in A4 changed to solution
Last candidate 3 in B3 changed to solution
Last candidate 8 in D5 changed to solution
Last candidate 6 in F1 changed to solution
Last candidate 5 in F7 changed to solution
Last candidate 2 in H3 changed to solution
Last candidate 4 in H6 changed to solution
Passo 29
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 8 in A3 changed to solution
Last candidate 3 in A7 changed to solution
Last candidate 7 in B7 changed to solution
Last candidate 8 in H7 changed to solution
Last candidate 8 in J4 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 6 in H4 changed to solution
Last candidate 4 in J7 changed to solution