Last candidate 8 in A8 changed to solution Last candidate 6 in J8 changed to solution Last candidate 7 in J2 changed to solution Last candidate 8 in J5 changed to solution

Last candidate 9 in A2 changed to solution Last candidate 7 in A5 changed to solution

1 in E8 is last in column/box
5 in G1 is last in column/box
8 in G7 is last in row/column/box

1 in B1 is last in column
4 in B8 is last in column

Naked Pair 2/3 on cells {B2|C1} means
- 3 can be removed from B3
- 2/3 can be removed from C2
- 3 can be removed from C3
Last candidate 6 in C2 changed to solution

6 in H3 is last in row/column/box

Hidden Pair 7/8 in Box 5, on cells {E4|E6}
- removes 2/4/6/9 from E4
- removes 2/4/5 from E6

6 in D4 is last in column/box
6 in E7 is last in row

Pair: between Box 4 and Col 3:
- 1 can be removed from G3

1 in G2 is last in row

Pair: between Box 4 and Row E:
- 2 can be removed from E5

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

Line/Box Reduction: 4s in box 4 remove the following in the same box:
- 4 can be removed from D3
- 4 can be removed from F3

If +3[E2] then -3[B2] forcing +3[B7] which removes all 3s from box 6, so E2 cannot be 3

If +3[C7] then -3[C1] forcing +3[E1] which removes all 3s from box 6, so C7 cannot be 3

length=7, chain ends: C8 and E9
This proves 5 is the solution at one or possibly both ends of the chain
-5[C8]+3[C8]-3[C1]+2[C1]-2[B2]+3[B2]-3[H2]+4[H2]-4[E2]+2[E2]-2[E1]+3[E1]-3[E9]+5[E9]
- 5 can be removed from C9

WXYZ Wing Type 1: The four cells {F3,D3,F4,G3} contain in total 1/3/4/9 with the hinge on F3.
Non-Restricted candidate 4 determines the 'wing' cells (in yellow) and one of those 4s must be true. Therefore...
- 4 can be removed from G4

4 in G3 is last in row

Last candidate 2 in B2 changed to solution Last candidate 3 in C1 changed to solution Last candidate 5 in C8 changed to solution Last candidate 2 in E1 changed to solution Last candidate 4 in E2 changed to solution Last candidate 2 in H8 changed to solution Last candidate 3 in G8 changed to solution Last candidate 7 in G9 changed to solution Last candidate 1 in H5 changed to solution

Last candidate 9 in C9 changed to solution Last candidate 2 in G4 changed to solution Last candidate 5 in H9 changed to solution Last candidate 7 in C7 changed to solution Last candidate 3 in E9 changed to solution Last candidate 9 in H7 changed to solution

Last candidate 3 in B7 changed to solution Last candidate 8 in C3 changed to solution Last candidate 2 in C6 changed to solution Last candidate 4 in D7 changed to solution Last candidate 9 in E3 changed to solution Last candidate 5 in E5 changed to solution Last candidate 5 in F7 changed to solution Last candidate 7 in B3 changed to solution Last candidate 9 in B5 changed to solution Last candidate 1 in D6 changed to solution Last candidate 3 in F5 changed to solution Last candidate 4 in F6 changed to solution Last candidate 7 in H6 changed to solution

Last candidate 8 in B4 changed to solution Last candidate 5 in B6 changed to solution Last candidate 3 in D3 changed to solution Last candidate 2 in D5 changed to solution Last candidate 7 in E4 changed to solution Last candidate 8 in E6 changed to solution Last candidate 1 in F3 changed to solution Last candidate 9 in F4 changed to solution Last candidate 4 in H4 changed to solution