Passi risolutivi (37)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 2 in D5 changed to solution
Passo 2
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 6 in D6 changed to solution
Passo 3
Naked Singles
valore: 2.8
categoria doc: Getting_Started
Last candidate 4 in G6 changed to solution
Passo 4
Hidden Singles
valore: 5.2
categoria doc: Getting_Started
1 in H4 is last in row
2 in J7 is last in row/column/box
7 in E4 is last in row/box
Passo 5
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
1 in A5 is last in column/box
4 in E5 is last in row/box
4 in J9 is last in row/box
6 in J4 is last in column/box
Passo 6
Hidden Singles
valore: 4.1
categoria doc: Getting_Started
5 in E7 is last in row
8 in F4 is last in column
Passo 7
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 5 in F5 changed to solution
Passo 8
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 3 in C5 changed to solution
Passo 9
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 6 in C9 changed to solution
Passo 10
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 3 in E9 changed to solution
Passo 11
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
1 in B7 is last in column
Passo 12
Naked Pair
valore: 16.1
categoria doc: Naked_Candidates
Naked Pair 3/5 on cells {H6|J6} means
- 5 can be removed from A6
Passo 13
Hidden Pair
valore: 31.4
categoria doc: Hidden_Candidates
Hidden Pair 3/4 in Box 1, on cells {A1|B1}
- removes 6/8 from A1
- removes 8 from B1
Passo 14
Naked Triple
valore: 60.5
categoria doc: Naked_Candidates
Naked Triple 2/7/8 on cells {B2|B3|B6} means
- 8 can be removed from A2
- 8 can be removed from A3
- 7/8 can be removed from B8
Passo 15
X-Wing
valore: 87.5
categoria doc: X_Wing_Strategy
(Col->Row) 7 taken off A3, based on CG37
(Col->Row) 7 taken off B3, based on CG37
(Col->Row) 7 taken off J3, based on CG37
(Col->Row) 7 taken off A7, based on CG37
Passo 16
Rectangle Elimination
valore: 72.2
categoria doc: Rectangle_Elimination
If +6[H2] then -6[F2] forcing +6[F7] which removes all 6s from Box 9, so H2 cannot be 6
Passo 17
Pointing Pairs
valore: 42.9
categoria doc: Intersection_Removal
Pair: between Box 7 and Row G:
- 6 can be removed from G7
Passo 18
XYZ Wing
valore: 170
categoria doc: XYZ_Wing
XYZ-Wing pattern. Hinge: A7 (3/4/9), wings A1 B8, therefore
- 3 can be removed from A8
Passo 19
Hidden Unique Rectangle
valore: 280.6
categoria doc: Hidden_Unique_Rectangles
Type 2: removing 2 at A2 because of AB26 and one strong link on 7 between B6 and B2
Passo 20
Hidden Unique Rectangle
valore: 277.9
categoria doc: Hidden_Unique_Rectangles
Type 1: removing 8 at E2 because of BE23 and two strong links on 2
Passo 21
Hidden Unique Rectangle
valore: 275.1
categoria doc: Hidden_Unique_Rectangles
Type 2b: removing 9 at H8 because of AH89 and one strong link on 8 between A9 and A8
Passo 22
Aligned Pair Exclusion
valore: 381.3
categoria doc: Aligned_Pair_Exclusion
Some solution combinations in the two gray cells would empty at least one of the coloured cells. Removing those combinations create eliminations in the gray cells.
Pair H8 / J8 reduced from 3/6/8->3/6/8 and 3/7/8/9->3/7/8
- Combinations of 7/8/9 found in ALS {G7,H9}
- Combinations of 1/3/6/9 found in ALS {B8,D8,E8}
Passo 23
Rectangle Elimination
valore: 67.4
categoria doc: Rectangle_Elimination
If +9[H2] then -9[F2] forcing +9[F7] which removes all 9s from Box 9, so H2 cannot be 9
Passo 24
Line/Unit Reduction
valore: 53.4
categoria doc: Intersection_Removal
Line/Box Reduction: 9s in box 9 remove the following in the same box:
- 9 can be removed from G7
Last candidate 7 in G7 changed to solution
Passo 25
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 4 in C7 changed to solution
Passo 26
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 5 in C4 changed to solution
Passo 27
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 7 in C3 changed to solution
Passo 28
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
7 in A8 is last in column/box
7 in B6 is last in row
7 in J2 is last in row/column/box
Passo 29
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 2 in A6 changed to solution
Passo 30
Hidden Singles
valore: 1.9
categoria doc: Getting_Started
8 in A9 is last in row/box
9 in F2 is last in column
Passo 31
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 1 in D3 changed to solution
Last candidate 6 in F7 changed to solution
Last candidate 9 in H9 changed to solution
Passo 32
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 9 in D8 changed to solution
Last candidate 1 in E8 changed to solution
Last candidate 3 in H7 changed to solution
Passo 33
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 9 in A7 changed to solution
Last candidate 3 in B8 changed to solution
Last candidate 5 in H6 changed to solution
Last candidate 8 in J8 changed to solution
Passo 34
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 4 in A4 changed to solution
Last candidate 4 in B1 changed to solution
Last candidate 8 in H2 changed to solution
Last candidate 6 in H8 changed to solution
Last candidate 1 in J1 changed to solution
Last candidate 9 in J5 changed to solution
Last candidate 3 in J6 changed to solution
Passo 35
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 3 in A1 changed to solution
Last candidate 2 in B2 changed to solution
Last candidate 9 in B4 changed to solution
Last candidate 6 in G1 changed to solution
Last candidate 8 in G5 changed to solution
Last candidate 5 in J3 changed to solution
Passo 36
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 6 in A3 changed to solution
Last candidate 8 in B3 changed to solution
Last candidate 8 in E1 changed to solution
Last candidate 6 in E2 changed to solution
Last candidate 9 in G3 changed to solution
Passo 37
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 5 in A2 changed to solution
Last candidate 2 in E3 changed to solution