Last candidate 3 in C2 changed to solution Last candidate 2 in C4 changed to solution

4 in D8 is last in column/box
5 in B6 is last in row
5 in C9 is last in column/box
5 in H2 is last in row/column/box
6 in A4 is last in row/column/box
7 in B3 is last in column/box
7 in F9 is last in row/box
9 in A1 is last in box
9 in F4 is last in box

5 in D5 is last in row/column/box
7 in A8 is last in row/column/box
7 in J6 is last in row/column/box

3 in B8 is last in column

3 in J4 is last in column

Naked Pair 4/8 on cells {A2|B2} means
- 8 can be removed from G2
- 4/8 can be removed from J2

Hidden Pair 8/9 in Box 9, on cells {H7|J9}
- removes 1/2 from H7
- removes 2 from J9

Pair: between Box 5 and Col 5:
- 1 can be removed from A5
- 1 can be removed from G5
- 1 can be removed from J5

length=5, chain ends: D6 and H8
This proves 2 is the solution at one or possibly both ends of the chain
-2[D6]+3[D6]-3[A6]+1[A6]-1[B4]+4[B4]-4[H4]+1[H4]-1[H8]+2[H8]
- 2 can be removed from H6

length=7. This XY-Chain is continuous and one value in each cell must be the solution, so all off-chain candidates can be removed
-8[B7]+1[B7]-1[B4]+4[B4]-4[A5]+3[A5]-3[A6]+1[A6]-1[H6]+9[H6]-9[H7]+9[J9]-8[J9]+8[A9]-8[B7]
- 1 can be removed from G6
- 9 can be removed from H3
- 8 can be removed from A7

Pair: between Box 8 and Row H:
- 1 can be removed from H3
- 1 can be removed from H8
Last candidate 2 in H8 changed to solution

Y-Wing pattern. Hinge: A6 (1/3), wings A7 D6, therefore
- 2 can be removed from D7

length=5, chain ends: G5 and H3
This proves 8 is the solution at one or possibly both ends of the chain
-8[G5]+2[G5]-2[G6]+9[G6]-9[H6]+1[H6]-1[H4]+4[H4]-4[H3]+8[H3]
- 8 can be removed from G1
- 8 can be removed from G3

8 in G5 is last in row

If +2[J3] then -2[D3] forcing +2[D6] which removes all 2s from box 8, so J3 cannot be 2

length=6, chain ends: E9 and J5
This proves 2 is the solution at one or possibly both ends of the chain
-2[E9]+9[E9]-9[J9]+8[J9]-8[H7]+9[H7]-9[H6]+1[H6]-1[H4]+4[H4]-4[J5]+2[J5]
- 2 can be removed from E5

(RULE 5): Uncoloured candidate 4 in J3 can see coloured 4 elsewhere and an oppositely coloured 9 in its own cell. It can be removed.
(RULE 5): Uncoloured candidate 8 in D3 can see coloured 8 elsewhere and an oppositely coloured 2 in its own cell. It can be removed.

8 in D1 is last in row/box

6 in D7 is last in row
6 in F2 is last in box

Naked Pair 1/2 on cells {G2|J2} means
- 1/2 can be removed from G3
- 1 can be removed from J3

2 cannot be set in the yellow cells {E4,E5,E6} and with the Remote Pair in D3 and F7 it means:
- 3 can be removed from F3

Y-Wing pattern. Hinge: G3 (3/9), wings D3 G6, therefore
- 2 can be removed from D6
Last candidate 3 in D6 changed to solution Last candidate 1 in E5 changed to solution Last candidate 2 in F5 changed to solution Last candidate 3 in F7 changed to solution Last candidate 4 in J5 changed to solution

Last candidate 3 in A5 changed to solution Last candidate 1 in A6 changed to solution Last candidate 2 in A7 changed to solution Last candidate 8 in A9 changed to solution Last candidate 4 in B4 changed to solution Last candidate 1 in B7 changed to solution Last candidate 2 in D3 changed to solution Last candidate 9 in E7 changed to solution Last candidate 2 in E9 changed to solution Last candidate 1 in F3 changed to solution Last candidate 1 in H4 changed to solution Last candidate 9 in H6 changed to solution Last candidate 8 in H7 changed to solution Last candidate 6 in J1 changed to solution Last candidate 1 in J8 changed to solution Last candidate 9 in J9 changed to solution Last candidate 4 in A2 changed to solution Last candidate 8 in B2 changed to solution Last candidate 3 in G1 changed to solution Last candidate 9 in G3 changed to solution Last candidate 2 in G6 changed to solution Last candidate 6 in G8 changed to solution Last candidate 4 in H3 changed to solution Last candidate 2 in J2 changed to solution Last candidate 8 in J3 changed to solution

Last candidate 4 in E1 changed to solution Last candidate 3 in E3 changed to solution Last candidate 1 in G2 changed to solution