This is part of the MC rollout. I simulate the bot playing games with seeing the Skat, and playing games without seeing the Skat. Then it is based purely on which game has higher EV. Which cards to discard when looking at the Skat is another MC rollout.
It is worth saying that the MC rollouts are fairly cheap because the playing architecture is cheap.
It is worth saying that the MC rollouts are fairly cheap because the playing architecture is cheap.