Passi risolutivi (34)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 4 in C2 changed to solution
Passo 2
Hidden Singles
valore: 5.3
categoria doc: Getting_Started
5 in A9 is last in column/box
7 in G8 is last in row
7 in J4 is last in column/box
8 in D6 is last in box
Passo 3
Pointing Pairs
valore: 71.8
categoria doc: Intersection_Removal
Pair: between Box 4 and Col 3:
- 1 can be removed from G3
- 1 can be removed from H3
- 1 can be removed from J3
Passo 4
Pointing Pairs
valore: 71.4
categoria doc: Intersection_Removal
Triple: between Box 5 and Col 5:
- 3 can be removed from J5
Passo 5
Pointing Pairs
valore: 70.6
categoria doc: Intersection_Removal
Pair: between Box 5 and Col 5:
- 9 can be removed from A5
- 9 can be removed from C5
Passo 6
Line/Unit Reduction
valore: 93
categoria doc: Intersection_Removal
Line/Box Reduction: 8s in box 9 remove the following in the same box:
- 8 can be removed from J7
- 8 can be removed from J8
Passo 7
W-Wing
valore: 115.5
categoria doc: W_Wings
W-Wing (single). Either there is a 1 in F4 or in H2. They are connected through 5 in E5/E2, therefore
- 1 can be removed from H4
Passo 8
Rectangle Elimination
valore: 114.9
categoria doc: Rectangle_Elimination
If +5[J5] then -5[E5] forcing +5[E2] which removes all 5s from Box 7, so J5 cannot be 5
Passo 9
Hidden Pair
valore: 45.1
categoria doc: Hidden_Candidates
Hidden Pair 5/9 in Col 5, on cells {E5|F5}
- removes 3 from E5
- removes 1/3 from F5
Passo 10
Hidden Singles
valore: 4.5
categoria doc: Getting_Started
3 in D5 is last in column/box
Passo 11
Naked Singles
valore: 2.1
categoria doc: Getting_Started
Last candidate 2 in D9 changed to solution
Passo 12
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 4 in D1 changed to solution
Last candidate 8 in G9 changed to solution
Passo 13
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 7 in D7 changed to solution
Passo 14
Naked Singles
valore: 1.9
categoria doc: Getting_Started
Last candidate 1 in D3 changed to solution
Passo 15
Hidden Singles
valore: 3.7
categoria doc: Getting_Started
1 in F4 is last in row/box
Passo 16
Hidden Pair
valore: 36
categoria doc: Hidden_Candidates
Hidden Pair 4/6 in Box 6, on cells {F7|F8}
- removes 3/9 from F7
- removes 9 from F8
Passo 17
Pointing Pairs
valore: 53.6
categoria doc: Intersection_Removal
Pair: between Box 9 and Row H:
- 2 can be removed from H6
Passo 18
XY-Chain
valore: 228.9
categoria doc: XY_Chains
length=4, chain ends: G3 and H4
This proves 4 is the solution at one or possibly both ends of the chain
-4[G3]+6[G3]-6[G2]+1[G2]-1[H2]+5[H2]-5[H4]+4[H4]
- 4 can be removed from G5
- 4 can be removed from H3
Last candidate 9 in H3 changed to solution
Passo 19
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
4 in G3 is last in row
Passo 20
XY-Chain
valore: 241.4
categoria doc: XY_Chains
length=5, chain ends: A4 and J3
This proves 8 is the solution at one or possibly both ends of the chain
-8[A4]+4[A4]-4[H4]+5[H4]-5[H2]+1[H2]-1[G2]+6[G2]-6[J3]+8[J3]
- 8 can be removed from A3
Passo 21
3D Medusa
valore: 253.1
categoria doc: 3D_Medusa
(RULE 5): Uncoloured candidate 3 in B3 can see coloured 3 elsewhere and an oppositely coloured 8 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 3 in J6 can see coloured 3 elsewhere and an oppositely coloured 5 in its own cell. It can be removed.
Passo 22
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
3 in B2 is last in row/box
3 in H6 is last in column/box
Passo 23
Chute Remote Pair
valore: 72.9
categoria doc: Chute_Remote_Pairs
1 cannot be set in the yellow cells {G7,G8,G9} and with the Remote Pair in H2 and J6 it means:
- 5 can be removed from H4
- 5 can be removed from J1
Last candidate 4 in H4 changed to solution
Last candidate 8 in J1 changed to solution
Passo 24
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 8 in A4 changed to solution
Last candidate 6 in J3 changed to solution
Passo 25
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 5 in B4 changed to solution
Last candidate 1 in G2 changed to solution
Last candidate 1 in J5 changed to solution
Passo 26
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 2 in C5 changed to solution
Last candidate 2 in G6 changed to solution
Last candidate 5 in H2 changed to solution
Last candidate 5 in J6 changed to solution
Passo 27
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 4 in A5 changed to solution
Last candidate 9 in B6 changed to solution
Last candidate 9 in C1 changed to solution
Last candidate 7 in E2 changed to solution
Last candidate 6 in G5 changed to solution
Passo 28
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 2 in A1 changed to solution
Last candidate 6 in A2 changed to solution
Last candidate 1 in A6 changed to solution
Last candidate 3 in E3 changed to solution
Passo 29
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 7 in A3 changed to solution
Last candidate 9 in A7 changed to solution
Last candidate 8 in B3 changed to solution
Last candidate 5 in F1 changed to solution
Last candidate 2 in F3 changed to solution
Passo 30
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 8 in E7 changed to solution
Last candidate 9 in F5 changed to solution
Passo 31
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 1 in C7 changed to solution
Last candidate 5 in E5 changed to solution
Last candidate 9 in E8 changed to solution
Last candidate 3 in F9 changed to solution
Passo 32
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 8 in C8 changed to solution
Last candidate 2 in H7 changed to solution
Last candidate 4 in J8 changed to solution
Last candidate 9 in J9 changed to solution
Passo 33
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 6 in B7 changed to solution
Last candidate 6 in F8 changed to solution
Last candidate 1 in H8 changed to solution
Last candidate 3 in J7 changed to solution
Passo 34
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in B8 changed to solution
Last candidate 4 in F7 changed to solution