It was east 4 of a hanchan and I had a pretty good hand, with 35 tiles left, and a decent lead.













I called riichi and two turns later, South discards the

Do I ignore it and go for the yakuman. I didn't.
I lucked out with the ura dora and busted an opponent with 24,600 pts to end the match right there.
Without the riichi (and the ura dora), the match would have continued (unless I got the yakuman).
In your opinion, did I play this correctly?