Passi risolutivi (31)
Passo 1
Hidden Singles
valore: 5.5
categoria doc: Getting_Started
1 in A2 is last in row/box
4 in D9 is last in row
4 in E4 is last in box
4 in J2 is last in row/box
5 in J5 is last in column
Passo 2
Hidden Singles
valore: 4.8
categoria doc: Getting_Started
3 in H2 is last in column/box
4 in A7 is last in column/box
5 in A8 is last in row
5 in B1 is last in box
Passo 3
Hidden Singles
valore: 4.1
categoria doc: Getting_Started
3 in A5 is last in row
4 in B5 is last in row
4 in C1 is last in column/box
5 in E9 is last in column/box
5 in F2 is last in row
Passo 4
Hidden Singles
valore: 3.8
categoria doc: Getting_Started
5 in D6 is last in row/column/box
Passo 5
Pointing Pairs
valore: 55.7
categoria doc: Intersection_Removal
Pair: between Box 6 and Col 8:
- 1 can be removed from J8
Passo 6
Pointing Pairs
valore: 54.5
categoria doc: Intersection_Removal
Pair: between Box 1 and Col 3:
- 6 can be removed from D3
- 6 can be removed from E3
- 6 can be removed from J3
Passo 7
Pointing Pairs
valore: 53.6
categoria doc: Intersection_Removal
Triple: between Box 6 and Col 8:
- 6 can be removed from G8
- 6 can be removed from J8
Passo 8
Pointing Pairs
valore: 52.8
categoria doc: Intersection_Removal
Pair: between Box 3 and Col 8:
- 9 can be removed from G8
- 9 can be removed from J8
Passo 9
Line/Unit Reduction
valore: 68.2
categoria doc: Intersection_Removal
Line/Box Reduction: 6s in box 8 remove the following in the same box:
- 6 can be removed from H4
- 6 can be removed from H6
- 6 can be removed from J4
- 6 can be removed from J6
Passo 10
Hidden Singles
valore: 3.3
categoria doc: Getting_Started
6 in J9 is last in row
Passo 11
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
1 in H9 is last in column/box
1 in J4 is last in row
3 in B9 is last in column
Passo 12
Hidden Unique Rectangle
valore: 291.6
categoria doc: Hidden_Unique_Rectangles
Type 2b: removing 2 at G8 because of CG89 and one strong link on 7 between C9 and C8
Passo 13
Grouped X-Cycle
valore: 317.7
categoria doc: Grouped_X_Cycles
X-CYCLE on 7 ((w.Groups) Discontinuous Alternating Nice Loop, length 6):
+7[F1]-7[F7]+7[H7|J7]-7[G8|G9]+7[G1]-7[F1]
- Contradiction: When F1 is set to 7 the chain implies it cannot be 7 - it can be removed
Passo 14
Hidden Singles
valore: 2.9
categoria doc: Getting_Started
7 in D3 is last in box
Passo 15
Chute Remote Pair
valore: 68.8
categoria doc: Chute_Remote_Pairs
8 cannot be set in the yellow cells {F1,F2,F3} and with the Remote Pair in D8 and E6 it means:
- 6 can be removed from E8
Passo 16
Rectangle Elimination
valore: 68.1
categoria doc: Rectangle_Elimination
If +8[B4] then -8[B3] forcing +8[E3] which removes all 8s from Box 5, so B4 cannot be 8
Passo 17
Hidden Pair
valore: 26.7
categoria doc: Hidden_Candidates
Hidden Pair 8/9 in Box 2, on cells {B6|C5}
- removes 2/6 from B6
Passo 18
Rectangle Elimination
valore: 66
categoria doc: Rectangle_Elimination
If +8[F8] then -8[F4] forcing +8[H4] which removes all 8s from Box 9, so F8 cannot be 8
Passo 19
Sword-Fish
valore: 127.9
categoria doc: Sword_Fish_Strategy
(Col->Row) 8 taken off E2, SF=CDG258
(Col->Row) 8 taken off H5, SF=CDG258
(Col->Row) 8 taken off E8, SF=CDG258
Passo 20
XY-Chain
valore: 164.5
categoria doc: XY_Chains
length=4, chain ends: B6 and F4
This proves 8 is the solution at one or possibly both ends of the chain
-8[B6]+9[B6]-9[B8]+2[B8]-2[B4]+6[B4]-6[F4]+8[F4]
- 8 can be removed from E6
Last candidate 6 in E6 changed to solution
Passo 21
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 8 in F4 changed to solution
Passo 22
Naked Singles
valore: 1.1
categoria doc: Getting_Started
Last candidate 7 in F7 changed to solution
Passo 23
Chute Remote Pair
valore: 53.6
categoria doc: Chute_Remote_Pairs
2 cannot be set in the yellow cells {A1,B1,C1} and with the Remote Pair in E2 and J3 it means:
- 9 can be removed from E3
- 9 can be removed from G2
Passo 24
Hidden Singles
valore: 2
categoria doc: Getting_Started
9 in E2 is last in row/column/box
9 in G5 is last in row
9 in J3 is last in column/box
Passo 25
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 8 in C5 changed to solution
Last candidate 6 in H5 changed to solution
Last candidate 3 in J7 changed to solution
Passo 26
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 9 in B6 changed to solution
Last candidate 2 in C2 changed to solution
Last candidate 8 in E7 changed to solution
Passo 27
Naked Singles
valore: 0.4
categoria doc: Getting_Started
Last candidate 6 in A3 changed to solution
Last candidate 2 in B8 changed to solution
Last candidate 7 in C9 changed to solution
Last candidate 6 in D8 changed to solution
Last candidate 2 in E3 changed to solution
Last candidate 6 in G2 changed to solution
Last candidate 9 in H7 changed to solution
Passo 28
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 8 in B3 changed to solution
Last candidate 6 in B4 changed to solution
Last candidate 9 in C8 changed to solution
Last candidate 8 in D2 changed to solution
Last candidate 1 in E1 changed to solution
Last candidate 1 in F8 changed to solution
Last candidate 2 in G9 changed to solution
Last candidate 7 in J8 changed to solution
Passo 29
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 3 in E8 changed to solution
Last candidate 6 in F1 changed to solution
Last candidate 7 in G1 changed to solution
Last candidate 8 in G8 changed to solution
Last candidate 2 in J6 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 7 in A6 changed to solution
Last candidate 2 in H1 changed to solution
Last candidate 7 in H4 changed to solution
Passo 31
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in A4 changed to solution
Last candidate 8 in H6 changed to solution