HanBkk

Following up on this.

I decided to buy the ticket. $658 ai for IST-KBP-PEK business class. I'm doing a 2 night stopover in Kiev as I've heard it's an interesting city.
Although the fare rules aren't very clear, the e-ticket receipt states very clearly at the bottom refund: free of charge , change of reservation: free of charge.
MSPeconomist is probably right about the difficulties of getting a refund. But the eticket receipt is quite clear so in worst case scenario, I could probably prevail in a credit card dispute.
The layout of the rules is confusing. But, I'm pretty sure the one way fares not permitted language refers to the after departure refund section. I purchased a one-way. I didn't see any X or R next to the fares listed.

I'll find out if it is a bargain or not. At any rate, it should be an adventure.