Passi risolutivi (23)
Passo 1
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 5 in D1 changed to solution
Last candidate 1 in E1 changed to solution
Last candidate 4 in E9 changed to solution
Passo 2
Hidden Singles
valore: 4.9
categoria doc: Getting_Started
6 in C7 is last in row/box
7 in A9 is last in column
7 in H7 is last in row/box
8 in J8 is last in column
9 in J4 is last in column/box
Passo 3
Hidden Singles
valore: 4.4
categoria doc: Getting_Started
1 in J5 is last in box
9 in A1 is last in column
Passo 4
Naked Pair
valore: 20.1
categoria doc: Naked_Candidates
Naked Pair 3/4 on cells {C1|C8} means
- 3/4 can be removed from C3
Passo 5
Naked Pair
valore: 19.9
categoria doc: Naked_Candidates
Naked Pair 2/6 on cells {D6|H6} means
- 2 can be removed from A6
Passo 6
Naked Pair
valore: 19.3
categoria doc: Naked_Candidates
Naked Pair 2/6 on cells {H5|H6} means
- 2/6 can be removed from H2
- 2/6 can be removed from H3
- 2 can be removed from H8
Last candidate 5 in H2 changed to solution
Passo 7
Hidden Singles
valore: 3.6
categoria doc: Getting_Started
2 in G8 is last in column
Passo 8
Pointing Pairs
valore: 51.2
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 3:
- 6 can be removed from G3
- 6 can be removed from J3
Passo 9
Pointing Pairs
valore: 50.3
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 3:
- 7 can be removed from B3
- 7 can be removed from C3
Passo 10
Pointing Pairs
valore: 49.5
categoria doc: Intersection_Removal
Triple: between Box 4 and Col 3:
- 8 can be removed from A3
- 8 can be removed from C3
Last candidate 1 in C3 changed to solution
Passo 11
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
1 in G2 is last in row/column/box
Passo 12
Hidden Singles
valore: 3
categoria doc: Getting_Started
6 in G9 is last in row
6 in J2 is last in column/box
Passo 13
Hidden Singles
valore: 2.8
categoria doc: Getting_Started
2 in J3 is last in row/box
Passo 14
Hidden Pair
valore: 27.2
categoria doc: Hidden_Candidates
Hidden Pair 2/8 in Row A, on cells {A2|A5}
- removes 4 from A5
Passo 15
Line/Unit Reduction
valore: 53.9
categoria doc: Intersection_Removal
Line/Box Reduction: 3s in box 3 remove the following in the same box:
- 3 can be removed from A7
Passo 16
Line/Unit Reduction
valore: 52.8
categoria doc: Intersection_Removal
Line/Box Reduction: 5s in box 3 remove the following in the same box:
- 5 can be removed from A7
- 5 can be removed from B7
Passo 17
Naked Pair
valore: 12.9
categoria doc: Naked_Candidates
Naked Pair 1/4 on cells {A6|A7} means
- 4 can be removed from A3
- 4 can be removed from A8
Passo 18
Naked Triple
valore: 49
categoria doc: Naked_Candidates
Naked Triple 2/6/8 on cells {A5|E5|H5} means
- 2 can be removed from B5
- 2/6/8 can be removed from D5
- 8 can be removed from F5
Passo 19
Rectangle Elimination
valore: 60.5
categoria doc: Rectangle_Elimination
If +4[B7] then -4[B3] forcing +4[H3] which removes all 4s from box 9, so B7 cannot be 4
Passo 20
Rectangle Elimination
valore: 59.1
categoria doc: Rectangle_Elimination
If either +4[C8] or +4[J1] are ON then both are on because they are strongly linked through the hinge cell C1. If both are ON then this removes all 4s from box 9, so neither can be 4
Last candidate 3 in C8 changed to solution
Last candidate 3 in J1 changed to solution
Last candidate 5 in J9 changed to solution
Passo 21
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 5 in A8 changed to solution
Last candidate 4 in C1 changed to solution
Last candidate 3 in F9 changed to solution
Last candidate 9 in G3 changed to solution
Last candidate 3 in G7 changed to solution
Last candidate 4 in H3 changed to solution
Last candidate 9 in H8 changed to solution
Last candidate 4 in J7 changed to solution
Last candidate 3 in A3 changed to solution
Last candidate 1 in A7 changed to solution
Last candidate 5 in B3 changed to solution
Last candidate 9 in B7 changed to solution
Last candidate 4 in B8 changed to solution
Passo 22
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 4 in A6 changed to solution
Last candidate 7 in B5 changed to solution
Last candidate 8 in C4 changed to solution
Last candidate 3 in D5 changed to solution
Last candidate 4 in F5 changed to solution
Last candidate 1 in F6 changed to solution
Last candidate 2 in A5 changed to solution
Last candidate 2 in B2 changed to solution
Last candidate 1 in B4 changed to solution
Last candidate 7 in C2 changed to solution
Last candidate 7 in F4 changed to solution
Last candidate 6 in H5 changed to solution
Last candidate 2 in H6 changed to solution
Passo 23
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 8 in A2 changed to solution
Last candidate 2 in D4 changed to solution
Last candidate 6 in D6 changed to solution
Last candidate 8 in D7 changed to solution
Last candidate 8 in E5 changed to solution
Last candidate 2 in E7 changed to solution
Last candidate 8 in F3 changed to solution
Last candidate 5 in F7 changed to solution
Last candidate 7 in D3 changed to solution
Last candidate 6 in E3 changed to solution