This article is from the Pool & Billiards FAQ, by Bob Jewett with numerous contributions by others.
Snooker
A common opening break in snooker is, to place the cue ball on either
side of the brown ball, and aim to thin the second to last row of reds,
with outside side spin, travel four cushions for a possible snooker
behind either green or yellow.
Nine Ball
After the break, the nine ball is in front of a pocket and there is no
way to hit the one ball. The shooter calls "push out," and pockets the
nine directly while leaving a hard shot on the one ball. The nine
spots, but is relatively safe.
One Pocket
Your opponent needs one ball to win, and it is sitting in the jaws of
his pocket. You pocket that ball and either scratch in the same pocket
or jump the cue ball off the table on the shot for a foul. That ball
comes back up, preventing your opponent from winning immediately, and
one of your balls spots as a penalty. Your opponent gets ball in hand
behind the line, perhaps with nothing to shoot at but the two spotted
balls.
 
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