Passi risolutivi (34)
Passo 1
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 4 in G5 changed to solution
Last candidate 6 in G6 changed to solution
Passo 2
Naked Singles
valore: 3
categoria doc: Getting_Started
Last candidate 7 in G2 changed to solution
Last candidate 3 in H4 changed to solution
Last candidate 9 in H6 changed to solution
Passo 3
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 1 in G8 changed to solution
Last candidate 8 in J6 changed to solution
Passo 4
Hidden Singles
valore: 4.3
categoria doc: Getting_Started
5 in C5 is last in box
5 in D6 is last in column
6 in B9 is last in row/box
7 in H8 is last in row/column/box
Passo 5
Hidden Singles
valore: 4
categoria doc: Getting_Started
5 in H9 is last in row
9 in B5 is last in column/box
Passo 6
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 3 in B2 changed to solution
Passo 7
Hidden Singles
valore: 3.5
categoria doc: Getting_Started
5 in E8 is last in row/column/box
8 in B4 is last in row
Passo 8
Pointing Pairs
valore: 49.5
categoria doc: Intersection_Removal
Pair: between Box 5 and Row F:
- 1 can be removed from F7
- 1 can be removed from F9
Passo 9
Rectangle Elimination
valore: 81.8
categoria doc: Rectangle_Elimination
If +6[D1] then -6[D8] forcing +6[J8] which removes all 6s from Box 7, so D1 cannot be 6
Passo 10
WXYZ Wing
valore: 321.9
categoria doc: WXYZ_Wing
WXYZ Wing Type 1: The four cells {C9,A8,C8,E9} contain in total 1/2/8/9 with the hinge on C9.
Non-Restricted candidate 8 determines the 'wing' cells (in yellow) and one of those 8s must be true. Therefore...
- 8 can be removed from A9
- 8 can be removed from D8
Passo 11
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
8 in A8 is last in row/column/box
8 in D5 is last in row
Passo 12
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 7 in F5 changed to solution
Passo 13
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 3 in E5 changed to solution
Passo 14
Hidden Singles
valore: 2.8
categoria doc: Getting_Started
3 in D3 is last in row/column/box
Passo 15
X-Wing
valore: 80.9
categoria doc: X_Wing_Strategy
(Col->Row) 4 taken off A1, based on DH17
(Col->Row) 4 taken off J1, based on DH17
(Col->Row) 4 taken off F7, based on DH17
(Col->Row) 4 taken off J7, based on DH17
Passo 16
Hidden Unique Rectangle
valore: 266.9
categoria doc: Hidden_Unique_Rectangles
Type 1: removing 2 at B1 because of BE13 and two strong links on 7
Passo 17
WXYZ Wing
valore: 264.1
categoria doc: WXYZ_Wing
WXYZ Wing Type 1: The four cells {D7,D8,F7,H7} contain in total 2/4/6/9 with the hinge on D7.
Non-Restricted candidate 6 determines the 'wing' cells (in yellow) and one of those 6s must be true. Therefore...
- 6 can be removed from E7
Passo 18
Line/Unit Reduction
valore: 52.3
categoria doc: Intersection_Removal
Line/Box Reduction: 6s in box 4 remove the following in the same box:
- 6 can be removed from F2
Passo 19
WXYZ Wing
valore: 255.8
categoria doc: WXYZ_Wing
WXYZ Wing Type 1: The four cells {E1,E3,F3,H1} contain in total 2/4/6/7 with the hinge on E1.
Non-Restricted candidate 4 determines the 'wing' cells (in yellow) and one of those 4s must be true. Therefore...
- 4 can be removed from D1
- 4 can be removed from J3
Passo 20
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
4 in D7 is last in row
4 in H1 is last in column
Passo 21
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 6 in H7 changed to solution
Passo 22
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in J8 changed to solution
Passo 23
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 2 in C8 changed to solution
Last candidate 3 in J7 changed to solution
Passo 24
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 6 in D8 changed to solution
Last candidate 4 in J9 changed to solution
Passo 25
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 2 in D4 changed to solution
Passo 26
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 9 in D1 changed to solution
Last candidate 1 in F6 changed to solution
Passo 27
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 2 in B6 changed to solution
Last candidate 6 in F4 changed to solution
Passo 28
Hidden Singles
valore: 1.3
categoria doc: Getting_Started
3 in A9 is last in row/column/box
Passo 29
Naked Pair
valore: 6.3
categoria doc: Naked_Candidates
Naked Pair 1/7 on cells {B1|B3} means
- 1 can be removed from A1
- 1 can be removed from A3
Last candidate 2 in A1 changed to solution
Passo 30
Bi-value Universal Grave
valore: 33.8
categoria doc: BUG
BUG+1 found in A2, 4 must be the solution
All other incomplete cells contain two candidates apart from A2. Other candidates in A2 would lead to zero, two or more solutions so they can be removed.
Last candidate 4 in A2 changed to solution
Passo 31
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 5 in A3 changed to solution
Last candidate 1 in A4 changed to solution
Last candidate 9 in C2 changed to solution
Last candidate 8 in F2 changed to solution
Passo 32
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 9 in A7 changed to solution
Last candidate 4 in C4 changed to solution
Last candidate 1 in C9 changed to solution
Last candidate 6 in E2 changed to solution
Last candidate 9 in F9 changed to solution
Last candidate 1 in J3 changed to solution
Passo 33
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 7 in B3 changed to solution
Last candidate 7 in E1 changed to solution
Last candidate 8 in E9 changed to solution
Last candidate 2 in F7 changed to solution
Last candidate 6 in J1 changed to solution
Last candidate 5 in J2 changed to solution
Passo 34
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in B1 changed to solution
Last candidate 2 in E3 changed to solution
Last candidate 1 in E7 changed to solution
Last candidate 4 in F3 changed to solution