Last candidate 3 in A7 changed to solution
Last candidate 9 in F9 changed to solution

Last candidate 7 in D9 changed to solution
Last candidate 6 in F1 changed to solution

Last candidate 4 in J9 changed to solution

Last candidate 5 in A9 changed to solution
Last candidate 2 in G9 changed to solution

Last candidate 1 in A1 changed to solution
Last candidate 6 in A2 changed to solution

Last candidate 4 in A8 changed to solution

Last candidate 8 in A6 changed to solution

2 in F5 is last in row
3 in J4 is last in row/box
6 in H3 is last in row/column/box
9 in D1 is last in column

4 in G3 is last in column/box

1 in J3 is last in column/box

Hidden Pair 7/9 in Box 5, on cells {E4|E6}
- removes 5/8 from E4
- removes 1/3/5 from E6

Pair: between Box 6 and Row E:
- 1 can be removed from E5

Pair: between Box 8 and Row G:
- 5 can be removed from G2

Pair: between Box 1 and Row C:
- 7 can be removed from C7
- 7 can be removed from C8

X-CYCLE on 8 (Discontinuous Alternating Nice Loop, length 8):
+8[H2]-8[J2]+8[J8]-8[F8]+8[F4]-8[E5]+8[H5]-8[H2]
- Contradiction: When H2 is set to 8 the chain implies it cannot be 8 - it can be removed

length=4, chain ends: H6 and J8
This proves 7 is the solution at one or possibly both ends of the chain
-7[H6]+4[H6]-4[F6]+3[F6]-3[F8]+8[F8]-8[J8]+7[J8]
- 7 can be removed from H7

Y-Wing pattern. Hinge: H7 (8/9), wings H2 J8, therefore
- 7 can be removed from J1
- 7 can be removed from J2
Last candidate 5 in J1 changed to solution

Last candidate 7 in C1 changed to solution
Last candidate 8 in J2 changed to solution

Last candidate 7 in J8 changed to solution

7 in B7 is last in row/column/box

2 in B3 is last in row
2 in C7 is last in column/box

2 in E2 is last in row/column/box

Naked Pair 6/9 on cells {B8|C8} means
- 9 can be removed from G8

Naked Pair 3/5 on cells {C2|C3} means
- 5 can be removed from C4
- 3/5 can be removed from C5
- 3/5 can be removed from C6

length=5, chain ends: F8 and H7
This proves 8 is the solution at one or possibly both ends of the chain
-8[F8]+3[F8]-3[F6]+4[F6]-4[H6]+7[H6]-7[H2]+9[H2]-9[H7]+8[H7]
- 8 can be removed from E7
- 8 can be removed from G8
Last candidate 1 in E7 changed to solution
Last candidate 1 in G8 changed to solution

(RULE 2): Two 4s in a single unit (in Box 2) have the same color in cells C4 C5 - all yellow coloured candidates can be removed
Last candidate 1 in C5 changed to solution
Last candidate 3 in E8 changed to solution
Last candidate 4 in F4 changed to solution
Last candidate 3 in F6 changed to solution
Last candidate 8 in F8 changed to solution
Last candidate 7 in G2 changed to solution
Last candidate 9 in G7 changed to solution
Last candidate 9 in H2 changed to solution
Last candidate 4 in H5 changed to solution
Last candidate 7 in H6 changed to solution
Last candidate 8 in H7 changed to solution

Last candidate 5 in D5 changed to solution
Last candidate 5 in E3 changed to solution
Last candidate 9 in E6 changed to solution
Last candidate 5 in G6 changed to solution

Last candidate 3 in B5 changed to solution
Last candidate 6 in B6 changed to solution
Last candidate 3 in C3 changed to solution
Last candidate 3 in D2 changed to solution
Last candidate 6 in D4 changed to solution
Last candidate 7 in E4 changed to solution
Last candidate 8 in E5 changed to solution
Last candidate 8 in G4 changed to solution

Last candidate 9 in B8 changed to solution
Last candidate 5 in C2 changed to solution
Last candidate 9 in C4 changed to solution
Last candidate 4 in C6 changed to solution
Last candidate 1 in D6 changed to solution

Last candidate 5 in B4 changed to solution
Last candidate 6 in C8 changed to solution