Passi risolutivi (30)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 2 in F2 changed to solution
Passo 2
Hidden Singles
valore: 5.7
categoria doc: Getting_Started
6 in G6 is last in box
8 in B7 is last in column
8 in F9 is last in row/box
8 in J1 is last in row/column/box
Passo 3
Hidden Singles
valore: 5.4
categoria doc: Getting_Started
4 in E9 is last in box
4 in F6 is last in row
Passo 4
Hidden Singles
valore: 5.1
categoria doc: Getting_Started
9 in E8 is last in box
9 in F4 is last in row
Passo 5
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 3 in E6 changed to solution
Passo 6
Naked Singles
valore: 2.3
categoria doc: Getting_Started
Last candidate 2 in D6 changed to solution
Passo 7
Hidden Singles
valore: 4.4
categoria doc: Getting_Started
5 in E1 is last in row
6 in E4 is last in column/box
Passo 8
Naked Pair
valore: 21.2
categoria doc: Naked_Candidates
Naked Pair 3/5 on cells {D7|D8} means
- 3 can be removed from D1
Passo 9
Hidden Pair
valore: 40.2
categoria doc: Hidden_Candidates
Hidden Pair 2/7 in Box 9, on cells {G9|H9}
- removes 1/3/5/9 from G9
- removes 1/3/5/9 from H9
Passo 10
Hidden Singles
valore: 3.9
categoria doc: Getting_Started
5 in G7 is last in row
Passo 11
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 3 in D7 changed to solution
Passo 12
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 5 in D8 changed to solution
Passo 13
Naked Pair
valore: 17.5
categoria doc: Naked_Candidates
Naked Pair 2/7 on cells {G9|H9} means
- 2 can be removed from A9
- 2 can be removed from B9
- 2 can be removed from C9
Passo 14
Pointing Pairs
valore: 52
categoria doc: Intersection_Removal
Pair: between Box 9 and Row J:
- 3 can be removed from J3
Last candidate 1 in J3 changed to solution
Passo 15
Hidden Singles
valore: 3.1
categoria doc: Getting_Started
1 in G5 is last in row
1 in H7 is last in box
Passo 16
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 7 in E5 changed to solution
Last candidate 5 in H4 changed to solution
Passo 17
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 1 in D4 changed to solution
Last candidate 1 in E2 changed to solution
Last candidate 9 in H6 changed to solution
Passo 18
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in A2 changed to solution
Last candidate 5 in B6 changed to solution
Last candidate 7 in D1 changed to solution
Last candidate 3 in H5 changed to solution
Passo 19
Naked Singles
valore: 0.9
categoria doc: Getting_Started
Last candidate 4 in A7 changed to solution
Last candidate 7 in G2 changed to solution
Passo 20
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 2 in G9 changed to solution
Passo 21
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 3 in G3 changed to solution
Last candidate 7 in H9 changed to solution
Passo 22
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 6 in F3 changed to solution
Last candidate 9 in G1 changed to solution
Passo 23
Naked Singles
valore: 0.7
categoria doc: Getting_Started
Last candidate 3 in F1 changed to solution
Passo 24
Line/Unit Reduction
valore: 25.3
categoria doc: Intersection_Removal
Line/Box Reduction: 2s in box 1 remove the following in the same box:
- 2 can be removed from B1
- 2 can be removed from B3
- 2 can be removed from C1
- 2 can be removed from C3
Passo 25
Naked Triple
valore: 23.7
categoria doc: Naked_Candidates
Naked Triple 4/6/9 on cells {C1|C5|C7} means
- 4 can be removed from C3
- 6 can be removed from C8
- 9 can be removed from C9
Passo 26
Bi-value Universal Grave
valore: 33.8
categoria doc: BUG
BUG+1 found in B1, 4 must be the solution
All other incomplete cells contain two candidates apart from B1. Other candidates in B1 would lead to zero, two or more solutions so they can be removed.
Last candidate 4 in B1 changed to solution
Passo 27
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 7 in B3 changed to solution
Last candidate 9 in B5 changed to solution
Last candidate 6 in C1 changed to solution
Last candidate 2 in H1 changed to solution
Passo 28
Naked Singles
valore: 0.2
categoria doc: Getting_Started
Last candidate 1 in A1 changed to solution
Last candidate 2 in B4 changed to solution
Last candidate 1 in B9 changed to solution
Last candidate 5 in C3 changed to solution
Last candidate 4 in C5 changed to solution
Last candidate 9 in C7 changed to solution
Last candidate 4 in H3 changed to solution
Passo 29
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in A3 changed to solution
Last candidate 5 in A9 changed to solution
Last candidate 6 in B8 changed to solution
Last candidate 7 in C4 changed to solution
Last candidate 3 in C9 changed to solution
Last candidate 6 in J7 changed to solution
Passo 30
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in C8 changed to solution
Last candidate 3 in J8 changed to solution
Last candidate 9 in J9 changed to solution