Passi risolutivi (43)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 5 in A1 changed to solution
Passo 2
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 1 in A4 changed to solution
Last candidate 3 in C1 changed to solution
Passo 3
Naked Singles
valore: 2.7
categoria doc: Getting_Started
Last candidate 7 in A6 changed to solution
Last candidate 2 in B1 changed to solution
Passo 4
Naked Singles
valore: 2.4
categoria doc: Getting_Started
Last candidate 6 in A7 changed to solution
Last candidate 7 in B2 changed to solution
Last candidate 9 in H1 changed to solution
Passo 5
Naked Singles
valore: 2.2
categoria doc: Getting_Started
Last candidate 1 in B3 changed to solution
Last candidate 4 in D1 changed to solution
Passo 6
Naked Singles
valore: 2.2
categoria doc: Getting_Started
Last candidate 8 in C3 changed to solution
Passo 7
Naked Singles
valore: 2.2
categoria doc: Getting_Started
Last candidate 6 in C2 changed to solution
Passo 8
Hidden Singles
valore: 4.2
categoria doc: Getting_Started
3 in B4 is last in row/box
4 in G3 is last in row/column/box
Passo 9
Hidden Singles
valore: 3.9
categoria doc: Getting_Started
5 in B7 is last in row
7 in J3 is last in column/box
Passo 10
Hidden Singles
valore: 3.7
categoria doc: Getting_Started
7 in G9 is last in column
Passo 11
Naked Pair
valore: 17.9
categoria doc: Naked_Candidates
Naked Pair 4/9 on cells {B8|B9} means
- 9 can be removed from C7
- 4/9 can be removed from C8
Passo 12
Pointing Pairs
valore: 53.2
categoria doc: Intersection_Removal
Pair: between Box 8 and Row J:
- 6 can be removed from J9
Passo 13
Hidden Pair
valore: 34.7
categoria doc: Hidden_Candidates
Hidden Pair 1/6 in Col 9, on cells {F9|H9}
- removes 3/4 from F9
- removes 3 from H9
Passo 14
Line/Unit Reduction
valore: 67.7
categoria doc: Intersection_Removal
Line/Box Reduction: 2s in box 8 remove the following in the same box:
- 2 can be removed from G4
- 2 can be removed from G6
- 2 can be removed from H6
Passo 15
Hidden Pair
valore: 33
categoria doc: Hidden_Candidates
Hidden Pair 2/6 in Col 4, on cells {F4|J4}
- removes 4/5 from F4
- removes 9 from J4
Passo 16
Hidden Singles
valore: 3.2
categoria doc: Getting_Started
4 in F8 is last in row
Passo 17
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 9 in B8 changed to solution
Passo 18
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 4 in B9 changed to solution
Last candidate 8 in E8 changed to solution
Passo 19
Hidden Singles
valore: 2.7
categoria doc: Getting_Started
8 in F2 is last in row/column/box
Passo 20
Naked Triple
valore: 52.8
categoria doc: Naked_Candidates
Naked Triple 1/2/6 on cells {G8|H8|H9} means
- 1 can be removed from G7
- 1 can be removed from H7
Passo 21
XY-Chain
valore: 219.8
categoria doc: XY_Chains
length=6, chain ends: F4 and J6
This proves 2 is the solution at one or possibly both ends of the chain
-2[F4]+6[F4]-6[F9]+1[F9]-1[F7]+3[F7]-3[E9]+9[E9]-9[J9]+3[J9]-3[J6]+2[J6]
- 2 can be removed from D6
- 2 can be removed from J4
Last candidate 6 in J4 changed to solution
Passo 22
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 2 in F4 changed to solution
Passo 23
Hidden Singles
valore: 2.4
categoria doc: Getting_Started
2 in J6 is last in row/column/box
Passo 24
Unique Rectangle 2+
valore: 116.9
categoria doc: Unique_Rectangles
Uniqueness Type 5: removing 5 from C6 and E4 because if true it would create a Deadly Rectangle with C4 and E4
Last candidate 4 in C6 changed to solution
Last candidate 4 in E4 changed to solution
Passo 25
Unique Rectangle Type 1
valore: 43.5
categoria doc: Unique_Rectangle
Uniqueness Type 1 removing 5/9 at G5 because of C5,C4,G4
Passo 26
Rectangle Elimination
valore: 53.6
categoria doc: Rectangle_Elimination
If +5[G2] then -5[E2] forcing +5[E6] which removes all 5s from Box 8, so G2 cannot be 5
Passo 27
Pointing Pairs
valore: 31.8
categoria doc: Intersection_Removal
Pair: between Box 7 and Row H:
- 5 can be removed from H6
Passo 28
Naked Triple
valore: 40.7
categoria doc: Naked_Candidates
Naked Triple 1/2/3 on cells {G2|G5|G8} means
- 1/3 can be removed from G6
- 3 can be removed from G7
Passo 29
Rectangle Elimination
valore: 50.2
categoria doc: Rectangle_Elimination
If +1[D8] then -1[D6] forcing +1[H6] which removes all 1s from Box 9, so D8 cannot be 1
Passo 30
Rectangle Elimination
valore: 49.5
categoria doc: Rectangle_Elimination
If +1[F5] then -1[F9] forcing +1[H9] which removes all 1s from Box 8, so F5 cannot be 1
Passo 31
Pointing Pairs
valore: 29.3
categoria doc: Intersection_Removal
Pair: between Box 5 and Row D:
- 1 can be removed from D7
Passo 32
XY-Chain
valore: 144.4
categoria doc: XY_Chains
length=5, chain ends: E6 and G4
This proves 5 is the solution at one or possibly both ends of the chain
-5[E6]+3[E6]-3[E9]+9[E9]-9[J9]+3[J9]-3[J5]+9[J5]-9[G4]+5[G4]
- 5 can be removed from G6
Last candidate 8 in G6 changed to solution
Passo 33
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 9 in G7 changed to solution
Passo 34
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 5 in G4 changed to solution
Last candidate 3 in J9 changed to solution
Passo 35
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 9 in C4 changed to solution
Last candidate 9 in E9 changed to solution
Last candidate 8 in H7 changed to solution
Last candidate 9 in J5 changed to solution
Passo 36
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 5 in C5 changed to solution
Passo 37
Hidden Singles
valore: 1.2
categoria doc: Getting_Started
5 in E6 is last in column/box
5 in F3 is last in row
9 in D2 is last in row/column/box
Passo 38
Naked Singles
valore: 0.5
categoria doc: Getting_Started
Last candidate 3 in E2 changed to solution
Passo 39
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 2 in D3 changed to solution
Last candidate 2 in G2 changed to solution
Passo 40
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 1 in G8 changed to solution
Last candidate 5 in H2 changed to solution
Last candidate 3 in H3 changed to solution
Passo 41
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 7 in C8 changed to solution
Last candidate 3 in G5 changed to solution
Last candidate 1 in H6 changed to solution
Last candidate 6 in H9 changed to solution
Passo 42
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in C7 changed to solution
Last candidate 3 in D6 changed to solution
Last candidate 6 in D8 changed to solution
Last candidate 6 in F5 changed to solution
Last candidate 1 in F9 changed to solution
Last candidate 2 in H8 changed to solution
Passo 43
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 1 in D5 changed to solution
Last candidate 7 in D7 changed to solution
Last candidate 3 in F7 changed to solution