Last candidate 4 in A6 changed to solution Last candidate 7 in F9 changed to solution Last candidate 1 in F8 changed to solution

Last candidate 4 in F4 changed to solution Last candidate 3 in F5 changed to solution Last candidate 6 in F2 changed to solution

1 in H7 is last in column/box
4 in G5 is last in column/box
7 in D3 is last in column
8 in D8 is last in row/box
9 in H2 is last in row
9 in J5 is last in box

2 in D5 is last in row
2 in G2 is last in column/box
9 in D6 is last in row

2 in A4 is last in column/box

2 in B7 is last in column

Naked Pair 6/8 on cells {A5|C5} means
- 8 can be removed from C4

Naked Pair 7/8 on cells {A7|C7} means
- 7 can be removed from A8
- 8 can be removed from B9
- 7 can be removed from C8
- 8 can be removed from C9

Naked Pair 1/5 on cells {D1|D2} means
- 5 can be removed from E1
- 5 can be removed from E2

Naked Pair 1/6 on cells {G3|J3} means
- 1/6 can be removed from B3
- 1/6 can be removed from G1
- 1 can be removed from J2

Naked Pair 5/8 on cells {G1|J2} means
- 8 can be removed from H1

Naked Pair 3/4 on cells {E1|H1} means
- 3/4 can be removed from B1
- 4 can be removed from C1

Line/Box Reduction: 8s in box 1 remove the following in the same box:
- 8 can be removed from A2
- 8 can be removed from C1
- 8 can be removed from C2

XYZ-Wing pattern. Hinge: G9 (5/6/8), wings G1 J8, therefore
- 5 can be removed from G8

Hidden Pair 5/8 in Row G, on cells {G1|G9}
- removes 6 from G9

Pair: between Box 9 and Col 8:
- 6 can be removed from A8
- 6 can be removed from B8
- 6 can be removed from C8
Last candidate 3 in A8 changed to solution

Last candidate 7 in A2 changed to solution Last candidate 8 in A7 changed to solution Last candidate 7 in C7 changed to solution Last candidate 6 in A5 changed to solution Last candidate 8 in C5 changed to solution

length=5, chain ends: B6 and D2
This proves 1 is the solution at one or possibly both ends of the chain
-1[B6]+5[B6]-5[C4]+1[C4]-1[J4]+8[J4]-8[J2]+5[J2]-5[D2]+1[D2]
- 1 can be removed from B2

length=5, chain ends: B9 and C1
This proves 6 is the solution at one or possibly both ends of the chain
-6[B9]+5[B9]-5[G9]+8[G9]-8[G1]+5[G1]-5[D1]+1[D1]-1[C1]+6[C1]
- 6 can be removed from B1
- 6 can be removed from C9

6 in B9 is last in row/column/box
6 in C1 is last in row/column/box

length=5, chain ends: C9 and E4
This proves 5 is the solution at one or possibly both ends of the chain
-5[C9]+9[C9]-9[E9]+2[E9]-2[H9]+8[H9]-8[H4]+7[H4]-7[E4]+5[E4]
- 5 can be removed from C4
Last candidate 1 in C4 changed to solution Last candidate 8 in J4 changed to solution

Last candidate 5 in B6 changed to solution Last candidate 4 in B8 changed to solution Last candidate 4 in C2 changed to solution Last candidate 3 in E2 changed to solution Last candidate 7 in E6 changed to solution Last candidate 1 in G6 changed to solution Last candidate 7 in H4 changed to solution Last candidate 2 in H8 changed to solution Last candidate 8 in H9 changed to solution Last candidate 5 in J2 changed to solution Last candidate 6 in J8 changed to solution Last candidate 8 in B2 changed to solution Last candidate 3 in B3 changed to solution Last candidate 1 in D2 changed to solution Last candidate 4 in E1 changed to solution Last candidate 5 in E4 changed to solution Last candidate 9 in E8 changed to solution Last candidate 2 in E9 changed to solution Last candidate 8 in G1 changed to solution Last candidate 6 in G3 changed to solution Last candidate 7 in G8 changed to solution Last candidate 5 in G9 changed to solution Last candidate 3 in H1 changed to solution Last candidate 4 in H3 changed to solution Last candidate 1 in J3 changed to solution

Last candidate 1 in B1 changed to solution Last candidate 5 in C8 changed to solution Last candidate 9 in C9 changed to solution Last candidate 5 in D1 changed to solution