Scat also known as 31 is the ultimate opponent.
Whether you're an experienced player or learning the game for the first time, Scat can help you.
It features three game levels. Play against computer opponents at a Novice, Medium, or Expert level.
Scat offers a challenge for both the new and experienced player.

The license of this software is Free Trial Software, the price is $10, you can free download and get a free trial.