In some regional or national circuit tournaments with multiple divisions, less experienced judges are most commonly placed in the Novice division, while the Junior Varsity and Varsity divisions enjoy more experienced judges. Judges are assigned to a specific division based on their experience and some other criteria, and are only eligible to judge debaters within that division (a judge assigned to judge novices cannot judge varsity). This is known as a pool; each division has its own pool of judges. At most national circuit tournaments, the judges within the varsity pool are often ranked beforehand from 1 to 5 by the debaters and their coaches as part of "mutual judge preferences" (MJP). A 1 is the best possible ranking, a 5 is a judge with a conflict of interest regarding the debater, and a 6 is a "strike", who may never judge the debater, teams are usually allowed 4-5 "strikes" per tournament. During the tournament, the tabulation staff will attempt to give each round a mutual judge (i.e. a judge who is a 1 for both sides). Different debaters "pref" different judges depending on their past experiences and debating styles. The most preferred judges are usually former debaters who are now college students serving as assistant coaches, as they know the modern norms of debate well.