Passi risolutivi (38)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 6 in E7 changed to solution
Passo 2
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 3 in E8 changed to solution
Passo 3
Naked Singles
valore: 2.8
categoria doc: Getting_Started
Last candidate 8 in E5 changed to solution
Passo 4
Naked Singles
valore: 2.7
categoria doc: Getting_Started
Last candidate 7 in E3 changed to solution
Passo 5
Naked Singles
valore: 2.6
categoria doc: Getting_Started
Last candidate 4 in E2 changed to solution
Passo 6
Hidden Singles
valore: 4.6
categoria doc: Getting_Started
1 in F9 is last in row/box
7 in D4 is last in row/column/box
8 in B3 is last in column
8 in C6 is last in column/box
8 in F2 is last in row/box
8 in G8 is last in row/column/box
9 in B8 is last in row/box
9 in H7 is last in column
Passo 7
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
4 in D6 is last in row/box
4 in J4 is last in column
5 in F1 is last in row
9 in G2 is last in column
Passo 8
Naked Singles
valore: 1.7
categoria doc: Getting_Started
Last candidate 9 in D1 changed to solution
Passo 9
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
1 in G4 is last in column/box
3 in D5 is last in row/box
9 in F5 is last in row/column/box
Passo 10
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
3 in C4 is last in column
Passo 11
Pointing Pairs
valore: 43.7
categoria doc: Intersection_Removal
Pair: between Box 3 and Row C:
- 1 can be removed from C1
- 1 can be removed from C2
Passo 12
Pointing Pairs
valore: 42.9
categoria doc: Intersection_Removal
Pair: between Box 8 and Row H:
- 5 can be removed from H2
- 5 can be removed from H3
Passo 13
Pointing Pairs
valore: 42.5
categoria doc: Intersection_Removal
Pair: between Box 9 and Col 9:
- 7 can be removed from C9
Passo 14
Rectangle Elimination
valore: 70.2
categoria doc: Rectangle_Elimination
If +2[B9] then -2[G9] forcing +2[G6] which removes all 2s from Box 2, so B9 cannot be 2
Passo 15
XY-Chain
valore: 236.2
categoria doc: XY_Chains
length=6, chain ends: B4 and C1
This proves 6 is the solution at one or possibly both ends of the chain
-6[B4]+2[B4]-2[B5]+5[B5]-5[H5]+2[H5]-2[G6]+3[G6]-3[G1]+7[G1]-7[C1]+6[C1]
- 6 can be removed from B1
Passo 16
3D Medusa
valore: 220.1
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 1 in H8 can see coloured 1 elsewhere and an oppositely coloured 4 in its own cell. It can be removed.
Passo 17
Pointing Pairs
valore: 40.9
categoria doc: Intersection_Removal
Pair: between Box 9 and Row J:
- 1 can be removed from J2
Passo 18
Hidden Unique Rectangle
valore: 269.6
categoria doc: Hidden_Unique_Rectangles
Type 1: removing 2 at C8 because of CJ78 and two strong links on 1
Passo 19
Aligned Pair Exclusion
valore: 373.6
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 G1 / H1 reduced from 3/7->3/7 and 1/3/6/7->1/3/7
- Pair 6/7 found in ALS {C1}
- Combinations of 2/3/5/6 found in ALS {H3,J2,J3}
Passo 20
Pointing Pairs
valore: 39.6
categoria doc: Intersection_Removal
Pair: between Box 7 and Col 3:
- 6 can be removed from A3
Passo 21
W-Wing
valore: 65.3
categoria doc: W_Wings
W-Wing (single). Either there is a 2 in A3 or in H5. They are connected through 5 in A6/B5, therefore
- 2 can be removed from H3
Last candidate 6 in H3 changed to solution
Passo 22
3D Medusa
valore: 198.1
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 2 in H2 can see coloured 2 elsewhere and an oppositely coloured 1 in its own cell. It can be removed.
Passo 23
Hidden Pair
valore: 24.5
categoria doc: Hidden_Candidates
Hidden Pair 2/5 in Box 7, on cells {J2|J3}
- removes 3 from J2
Passo 24
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
3 in J9 is last in row
Passo 25
Hidden Singles
valore: 2.3
categoria doc: Getting_Started
6 in J8 is last in row/box
Passo 26
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
1 in C8 is last in column
1 in J7 is last in row/box
Passo 27
Naked Pair
valore: 9.9
categoria doc: Naked_Candidates
Naked Pair 2/7 on cells {A7|C7} means
- 2 can be removed from A8
- 2 can be removed from C9
Passo 28
Unique Rectangle Type 1
valore: 38.5
categoria doc: Unique_Rectangle
Uniqueness Type 1 removing 2/5 at A2 because of A3,J3,J2
Passo 29
XY-Chain
valore: 140.3
categoria doc: XY_Chains
length=5, chain ends: A3 and B5
This proves 2 is the solution at one or possibly both ends of the chain
-2[A3]+5[A3]-5[A8]+4[A8]-4[H8]+2[H8]-2[H5]+5[H5]-5[B5]+2[B5]
- 2 can be removed from A6
- 2 can be removed from B2
Passo 30
Chute Remote Pair
valore: 46.1
categoria doc: Chute_Remote_Pairs
6 cannot be set in the yellow cells {B1,B2,B3} and with the Remote Pair in A6 and C9 it means:
- 5 can be removed from A8
Last candidate 4 in A8 changed to solution
Passo 31
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 2 in H8 changed to solution
Passo 32
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 5 in D8 changed to solution
Last candidate 7 in G9 changed to solution
Last candidate 5 in H5 changed to solution
Passo 33
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 2 in B5 changed to solution
Last candidate 2 in D9 changed to solution
Last candidate 3 in G1 changed to solution
Last candidate 3 in H6 changed to solution
Last candidate 4 in H9 changed to solution
Passo 34
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 6 in B4 changed to solution
Last candidate 2 in G6 changed to solution
Passo 35
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 5 in A6 changed to solution
Last candidate 5 in B9 changed to solution
Last candidate 2 in F4 changed to solution
Last candidate 6 in F6 changed to solution
Passo 36
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 2 in A3 changed to solution
Last candidate 1 in B2 changed to solution
Last candidate 6 in C9 changed to solution
Passo 37
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 7 in A7 changed to solution
Last candidate 4 in B1 changed to solution
Last candidate 7 in C1 changed to solution
Last candidate 7 in H2 changed to solution
Last candidate 5 in J3 changed to solution
Passo 38
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 6 in A1 changed to solution
Last candidate 3 in A2 changed to solution
Last candidate 5 in C2 changed to solution
Last candidate 2 in C7 changed to solution
Last candidate 1 in H1 changed to solution
Last candidate 2 in J2 changed to solution