Daily League Sudoku #14: Odd Even Frame Sudoku

Last week I didn't contribute a Sudoku to the Daily League, but this week I'm back. This week features another Frame Sudoku variant. As I'm a fan of most sudokus with sums and I'm pretty good at them, writing these generally comes pretty easy to me. It generally avoids the annoying problem of running out of solutions. I'm pretty sure I've seen this variant before. I'm just not able to remember where I have.
The last few Sudokus had been a bit easier than some of my others. I think this one will again be a bit more challenging, because it has a bit narrower solution path. I think I used the rules pretty well and it stays challenging till the end. I don't want to scare anyone off. I don't think there are any really hard deductions. I just expect slower times than in the previous few weeks. I hope you all enjoy it.

Recap of the last 2 weeks:

Sunday: Coded Sudoku by Seungjae Kwak
Monday: Odd Antiknight Sudoku by Jan Zverina
Tuesday: Anti-Diagonal and Fortress Sudoku by Prasanna Seshadri
Wednesday: Greater Than Sudoku by Bastien Vial-Jaime
Thursday: No Donkey Step Sudoku by Rishi Puri
Friday: Unique Sums Sudoku by Jakub Hrazdira
Saturday: Equal Sudoku by Christoph Seeliger

Sunday: Extra Regions Sudoku by Seungjae Kwak
Monday: Irregular Scattered Sudoku by Fred Stalder
Tuesday: Kropki Sudoku by Prasanna Seshadri
Wednesday: Figures Sudoku by Bastien Vial-Jaime
Thursday: Asterisk Sudoku by Rishi Puri
Friday: Frameless Sudoku by Jakub Hrazdira

Daily League PDF's:
Week 14
Week 15

Rules for Sudoku

In this Sudoku, the numbers on the outside indicate the sum of all odd digits or the sum of all even digits in the first 3 cells seen from that side. It can be that a clue indicates both the sum of all odd digits and the sum of all even digits.