This puzzle was posted in Womens World and I have marked all possibles in I just can't get it. I have been trying to work through the logic and would like to make sense of this, please help
____________
4 - -|268|1 7 -
- 7 -|391|2 - -
1 - 2|754|8 6 -
____________
- 8 -|475|921
- - 1|632|78 -
- - 7|189|- 36
____________
- - -|51-|692
- - 9|84-|-17
- 1 -|92-|--8