Last candidate 4 in E5 changed to solution Last candidate 9 in F3 changed to solution

Last candidate 5 in B5 changed to solution

Last candidate 9 in H5 changed to solution

2 in H7 is last in column
7 in D2 is last in row/box
9 in A4 is last in row/column/box
9 in E9 is last in row/box

1 in E1 is last in row
2 in F9 is last in column/box
7 in A6 is last in row/box

6 in F8 is last in row/box
8 in D1 is last in box

3 in F6 is last in row
5 in D4 is last in row
6 in H9 is last in box

5 in H6 is last in row

Pair: between Box 2 and Row B:
- 4 can be removed from B7
- 4 can be removed from B8

Line/Box Reduction: 6s in box 2 remove the following in the same box:
- 6 can be removed from B4
- 6 can be removed from B6

Naked Triple 3/5/8 on cells {B8|C8|C9} means
- 3 can be removed from A7
- 3/5 can be removed from A9
- 3 can be removed from B7

3 in A3 is last in row

Pair: between Box 3 and Row C:
- 5 can be removed from C2

Hidden Triple 1/7/8 in Row J, on cells {J3|J4|J6}
- removes 4 from J4
- removes 4 from J6

length=5, chain ends: A1 and F2
This proves 5 is the solution at one or possibly both ends of the chain
-5[A1]+6[A1]-6[B1]+2[B1]-2[C2]+8[C2]-8[H2]+4[H2]-4[F2]+5[F2]
- 5 can be removed from A2
- 5 can be removed from F1
Last candidate 1 in A2 changed to solution Last candidate 4 in F1 changed to solution

Last candidate 4 in A9 changed to solution Last candidate 8 in B3 changed to solution Last candidate 5 in F2 changed to solution Last candidate 9 in J1 changed to solution

Last candidate 6 in A7 changed to solution Last candidate 3 in B8 changed to solution Last candidate 2 in C2 changed to solution Last candidate 2 in G1 changed to solution Last candidate 7 in H3 changed to solution

Last candidate 5 in A1 changed to solution Last candidate 6 in B1 changed to solution Last candidate 1 in B7 changed to solution Last candidate 6 in C6 changed to solution Last candidate 5 in C9 changed to solution Last candidate 4 in D8 changed to solution Last candidate 4 in G2 changed to solution Last candidate 1 in J3 changed to solution

Last candidate 3 in C4 changed to solution Last candidate 8 in C8 changed to solution Last candidate 3 in D7 changed to solution Last candidate 6 in G4 changed to solution Last candidate 1 in G6 changed to solution Last candidate 9 in G8 changed to solution Last candidate 8 in H2 changed to solution Last candidate 8 in J6 changed to solution Last candidate 5 in J8 changed to solution Last candidate 3 in J9 changed to solution

Last candidate 1 in D9 changed to solution Last candidate 2 in E6 changed to solution Last candidate 4 in H4 changed to solution Last candidate 7 in J4 changed to solution Last candidate 4 in J7 changed to solution

Last candidate 2 in B4 changed to solution Last candidate 4 in B6 changed to solution Last candidate 8 in E4 changed to solution