I came across Mahjong whilst playing a Playstation game called "Judgement". I enjoyed it so much I bought a set and got my family playing it. Now we have regularly Mahjong evenings.
However, frustratingly, when I return to the Playstation game I find that hands which I believe should win, do not / or are not allowed. I don't know if the game is getting something wrong or me?
For example, why is the following hand (at bottom of screen) not Tanyao i.e. all simples / no terminals?