Passi risolutivi (26)
Passo 1
Naked Singles
valore: 1
categoria doc: Getting_Started
Last candidate 9 in B1 changed to solution
Passo 2
Hidden Singles
valore: 5.8
categoria doc: Getting_Started
2 in J6 is last in row/column/box
8 in E1 is last in column
9 in D6 is last in row/box
Passo 3
Hidden Singles
valore: 5.4
categoria doc: Getting_Started
8 in F4 is last in box
8 in H9 is last in column
Passo 4
Hidden Singles
valore: 5
categoria doc: Getting_Started
8 in G3 is last in row/column/box
Passo 5
Pointing Pairs
valore: 74.3
categoria doc: Intersection_Removal
Pair: between Box 5 and Col 5:
- 1 can be removed from G5
Passo 6
Pointing Pairs
valore: 73
categoria doc: Intersection_Removal
Pair: between Box 8 and Row H:
- 1 can be removed from H2
- 1 can be removed from H3
- 1 can be removed from H8
Passo 7
Unique Rectangle 2+
valore: 242.1
categoria doc: Unique_Rectangles
Uniqueness Type 5: removing 4 from H6 because if true it would create a Deadly Rectangle with B6 and H6
Last candidate 1 in H6 changed to solution
Passo 8
Hidden Unique Rectangle
valore: 473.2
categoria doc: Hidden_Unique_Rectangles
Type 1: removing 4 at J2 because of GJ27 and two strong links on 9
Passo 9
X-Cycle
valore: 352.8
categoria doc: X_Cycles
X-CYCLE Rule 3 (Discontinuous Alternating Nice Loop, length 8):
+4[G7]-4[J7]+4[J3]-4[A3]+4[A4]-4[H4]+4[G5]-4[G7]
- Contradiction: When G7 is set to 4 the chain implies it cannot be 4 - it can be removed
Last candidate 9 in G7 changed to solution
Passo 10
Hidden Singles
valore: 4.5
categoria doc: Getting_Started
9 in J2 is last in row/column/box
Passo 11
W-Wing
valore: 110
categoria doc: W_Wings
W-Wing (single). Either there is a 1 in B4 or in G8. They are connected through 4 in H4/G5, therefore
- 1 can be removed from B8
Passo 12
Hidden Singles
valore: 4.4
categoria doc: Getting_Started
1 in B4 is last in row
Passo 13
X-Cycle
valore: 321.9
categoria doc: X_Cycles
X-CYCLE Rule 3 (Discontinuous Alternating Nice Loop, length 8):
+4[G8]-4[J7]+4[J3]-4[A3]+4[A4]-4[H4]+4[G5]-4[G8]
- Contradiction: When G8 is set to 4 the chain implies it cannot be 4 - it can be removed
Last candidate 1 in G8 changed to solution
Passo 14
Naked Singles
valore: 2
categoria doc: Getting_Started
Last candidate 3 in J9 changed to solution
Passo 15
Naked Singles
valore: 1.8
categoria doc: Getting_Started
Last candidate 5 in E9 changed to solution
Last candidate 7 in J1 changed to solution
Passo 16
Naked Singles
valore: 1.5
categoria doc: Getting_Started
Last candidate 3 in A1 changed to solution
Last candidate 1 in A9 changed to solution
Last candidate 4 in E6 changed to solution
Last candidate 4 in J7 changed to solution
Passo 17
Naked Singles
valore: 1.4
categoria doc: Getting_Started
Last candidate 5 in A7 changed to solution
Last candidate 1 in J3 changed to solution
Passo 18
Naked Singles
valore: 1.3
categoria doc: Getting_Started
Last candidate 9 in A8 changed to solution
Last candidate 7 in H7 changed to solution
Passo 19
Naked Singles
valore: 1.2
categoria doc: Getting_Started
Last candidate 2 in F7 changed to solution
Last candidate 5 in H8 changed to solution
Passo 20
Hidden Singles
valore: 2.1
categoria doc: Getting_Started
2 in E2 is last in row/box
4 in A4 is last in box
4 in F8 is last in row/column/box
4 in G5 is last in column
9 in C4 is last in row/column/box
Passo 21
Naked Singles
valore: 0.8
categoria doc: Getting_Started
Last candidate 7 in A3 changed to solution
Last candidate 6 in G2 changed to solution
Last candidate 6 in H4 changed to solution
Passo 22
Naked Singles
valore: 0.6
categoria doc: Getting_Started
Last candidate 5 in C2 changed to solution
Last candidate 7 in E4 changed to solution
Last candidate 5 in F3 changed to solution
Passo 23
Naked Singles
valore: 0.3
categoria doc: Getting_Started
Last candidate 4 in B2 changed to solution
Last candidate 7 in C5 changed to solution
Last candidate 8 in C6 changed to solution
Last candidate 3 in D3 changed to solution
Last candidate 6 in E5 changed to solution
Last candidate 3 in E8 changed to solution
Last candidate 1 in F5 changed to solution
Passo 24
Naked Singles
valore: 0.1
categoria doc: Getting_Started
Last candidate 5 in B6 changed to solution
Last candidate 2 in C8 changed to solution
Last candidate 5 in D5 changed to solution
Last candidate 8 in D7 changed to solution
Last candidate 7 in F2 changed to solution
Last candidate 3 in H2 changed to solution
Last candidate 4 in H3 changed to solution
Passo 25
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 6 in B7 changed to solution
Last candidate 8 in B8 changed to solution
Last candidate 6 in C3 changed to solution
Last candidate 1 in D2 changed to solution
Last candidate 7 in D8 changed to solution
Passo 26
Naked Singles
valore: 0
categoria doc: Getting_Started
Last candidate 2 in B3 changed to solution
Last candidate 3 in C7 changed to solution