Last candidate 6 in A7 changed to solution Last candidate 5 in A8 changed to solution

2 in B7 is last in column
4 in D7 is last in row/box
4 in G1 is last in column/box
4 in J6 is last in row
5 in F9 is last in column/box
7 in A4 is last in row/column/box

Last candidate 9 in B1 changed to solution Last candidate 4 in B9 changed to solution Last candidate 9 in C9 changed to solution Last candidate 3 in A2 changed to solution Last candidate 9 in A6 changed to solution Last candidate 2 in C1 changed to solution

2 in E3 is last in row/column/box
4 in C5 is last in row/column/box

Naked Pair 3/6 on cells {E1|E9} means
- 3 can be removed from E5
- 3 can be removed from E7

Pair: between Box 6 and Col 8:
- 7 can be removed from G8

7 in G9 is last in row

Pair: between Box 9 and Row H:
- 3 can be removed from H1
- 3 can be removed from H3
- 3 can be removed from H4
- 3 can be removed from H5
- 3 can be removed from H6

3 in J3 is last in box

Pair: between Box 5 and Col 5:
- 9 can be removed from G5
- 9 can be removed from H5

(Col->Row) 6 taken off G2, based on FJ28
(Col->Row) 6 taken off G8, based on FJ28

Line/Box Reduction: 6s in box 8 remove the following in the same box:
- 6 can be removed from H5
- 6 can be removed from H6

length=6. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-7[D1]+3[D1]-3[E1]+6[E1]-6[E9]+3[E9]-3[F7]+1[F7]-1[E7]+8[E7]-8[D8]+7[D8]-7[D1]
- 7 can be removed from D3

(RULE 5): Uncoloured candidate 1 in F2 can see coloured 1 elsewhere and an oppositely coloured 6 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 9 in F5 can see coloured 9 elsewhere and an oppositely coloured 3 in its own cell. It can be removed.

1 in D2 is last in column/box
9 in D5 is last in column/box

Last candidate 5 in D3 changed to solution Last candidate 8 in B3 changed to solution Last candidate 1 in B4 changed to solution Last candidate 5 in C2 changed to solution

1 in H6 is last in column

5 in B6 is last in column
5 in H5 is last in row/box

Last candidate 6 in B5 changed to solution

6 in G6 is last in row/column/box

8 cannot be set in the yellow cells {H1,H2,H3} and with the Remote Pair in G8 and J4 it means:
- 2 can be removed from G4
- 2 can be removed from J8

2 in G8 is last in row/column/box
2 in J4 is last in row/column/box

BUG+1 found in G4, 8 must be the solution

All other incomplete cells contain two candidates apart from G4. Other candidates in G4 would create two or more solutions so they can be removed.
Last candidate 8 in G4 changed to solution Last candidate 3 in G5 changed to solution Last candidate 9 in H4 changed to solution

Last candidate 3 in C4 changed to solution Last candidate 8 in C6 changed to solution Last candidate 3 in D6 changed to solution Last candidate 1 in F5 changed to solution Last candidate 3 in F7 changed to solution Last candidate 9 in G2 changed to solution Last candidate 7 in H3 changed to solution Last candidate 8 in H7 changed to solution Last candidate 6 in J8 changed to solution Last candidate 7 in D1 changed to solution Last candidate 8 in D8 changed to solution Last candidate 8 in E5 changed to solution Last candidate 1 in E7 changed to solution Last candidate 6 in E9 changed to solution Last candidate 6 in F2 changed to solution Last candidate 9 in F3 changed to solution Last candidate 7 in F8 changed to solution Last candidate 6 in H1 changed to solution Last candidate 3 in H9 changed to solution Last candidate 8 in J2 changed to solution

Last candidate 3 in E1 changed to solution