One of our developers wrote a post about developing the opponent AI for a game we're making for the Gear VR, so we thought it might be useful/interesting to share on here.
In the end, we found that typical AI techniques wouldn't work well for us on mobile, so we ended up creating a custom AI solution for ourselves.
The game itself presented some interesting challenges for common AI techniques too, due to the peculiar way the first few moves put you into the negative in terms of scoring.