9. (3 points) Four children, A, B, C, and D, are having a chess competition. Each pair of them plays one game. The winner gets 3 points, a draw gets 1 point, and the loser gets 0 points. In the end, D gets 6 points, B gets 4 points, and C gets 2 points. So, how many points does A get? $\qquad$ points.
【Answer】Solution: Each two people play one game, which means a total of 6 games are played, and each person plays three games;
Ding getting six points indicates: winning two games and losing one game $(3+3+0=6)$;
Yi getting four points indicates: winning one game, drawing one game, and losing one game $(3+1+0=4)$;
Bing getting two points indicates: drawing two games and losing one game $(1+1+0=2)$;
Winning, drawing, and losing each three games indicates: the total score of the six games should be $(3+0)+(3+0)+(3+0)+(1+1)+(1+1)+(1+1)=12$ points;
Jia's score: $12-6-4-2=0$ (points);
Answer: Therefore, Jia gets 0 points;
The answer is: 0.