1. Criss-Cross Dominos selection when one domino crosses another often does not allow you to select the domino you want to score the most points.
2. Often, the computer will place your domino by the wrong selection in a quick fashion to avoid you scoring or placing your domino where it wants it to be to allow them to score.
3. Perhaps the most Egregious Problem is the hoarding of a certain numbered die (blank, 1,2,3,4,5,6) to block you out, and forcing you to endlessly pull from the pile. The odds of a player holding all or a substantial number of the blanks,1,2,3,4,5 or 6 sided dominos are highly improbable!
4. Lastly, miracle comebacks, scoring sprees often occur, by your being unable to go out! Then the game directs you, by only making available, the use of the certain dominos it needs you to play for it to score. In a computer controlled predetermined fashion.
5. By seeing your hand. By not knowing what dominos are left to pull from. Often the computer pulls until it selects a domino it needs to score!
Notoriously, cheats!