Last candidate 5 in E9 changed to solution

Last candidate 7 in E8 changed to solution

Last candidate 8 in E7 changed to solution

2 in C6 is last in row/column/box
4 in A3 is last in column/box
4 in D7 is last in row/box
4 in G4 is last in column/box

1 in D3 is last in row
2 in A1 is last in row/box

2 in G3 is last in row
7 in F3 is last in box

Last candidate 3 in F6 changed to solution

5 in D1 is last in box

Pair: between Box 1 and Row B:
- 8 can be removed from B4
- 8 can be removed from B6

(Col->Row) 1 taken off G6, SF=BFH679
(Col->Row) 1 taken off A7, SF=BFH679
(Col->Row) 1 taken off J7, SF=BFH679
(Col->Row) 1 taken off J9, SF=BFH679

length=5, chain ends: B1 and G6
This proves 8 is the solution at one or possibly both ends of the chain
-8[B1]+6[B1]-6[B4]+7[B4]-7[B6]+1[B6]-1[H6]+9[H6]-9[G6]+8[G6]
- 8 can be removed from G1

8 in B1 is last in column
8 in J3 is last in box

length=5. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-9[H4]+5[H4]-5[F4]+6[F4]-6[B4]+7[B4]-7[B6]+1[B6]-1[H6]+9[H6]-9[H4]
- 6 can be removed from C4
- 7 can be removed from B7
- 7 can be removed from C4
- 9 can be removed from G5
- 9 can be removed from G6
- 9 can be removed from H1
- 9 can be removed from H3
- 9 can be removed from H7
- 9 can be removed from H9
- 9 can be removed from J5
Last candidate 8 in G6 changed to solution

9 in E3 is last in column
9 in G1 is last in row/box

Hidden Pair 4/9 in Col 9, on cells {C9|J9}
- removes 3 from J9

W-Wing (single). Either there is a 5 in F4 or in H3. They are connected through 6 in B4/B3, therefore
- 5 can be removed from H4

Last candidate 9 in H4 changed to solution

Last candidate 8 in C4 changed to solution Last candidate 1 in H6 changed to solution

Last candidate 7 in B6 changed to solution Last candidate 7 in D4 changed to solution

Last candidate 6 in B4 changed to solution Last candidate 9 in D6 changed to solution

Last candidate 5 in B3 changed to solution Last candidate 9 in C5 changed to solution Last candidate 8 in D5 changed to solution Last candidate 5 in F4 changed to solution

Last candidate 1 in A5 changed to solution Last candidate 4 in C9 changed to solution Last candidate 6 in F5 changed to solution Last candidate 6 in H3 changed to solution

Last candidate 6 in A8 changed to solution Last candidate 3 in H1 changed to solution Last candidate 9 in J9 changed to solution

Last candidate 7 in A2 changed to solution Last candidate 5 in C8 changed to solution Last candidate 6 in E1 changed to solution Last candidate 2 in H9 changed to solution

Last candidate 9 in A7 changed to solution Last candidate 6 in C2 changed to solution Last candidate 7 in C7 changed to solution Last candidate 3 in E2 changed to solution Last candidate 1 in F9 changed to solution Last candidate 1 in G8 changed to solution Last candidate 5 in H7 changed to solution

Last candidate 3 in B9 changed to solution Last candidate 2 in F7 changed to solution Last candidate 5 in G2 changed to solution Last candidate 3 in J7 changed to solution Last candidate 4 in J8 changed to solution

Last candidate 1 in B7 changed to solution Last candidate 3 in G5 changed to solution Last candidate 1 in J2 changed to solution Last candidate 5 in J5 changed to solution