hanisch said:
...
http://www.billiard-online.com/ecpsporte/rules.html
... also, (see rule 24) you have to do more than just hit a ball to a rail for a legal shot.
... more amazing, the corner pocket is 74 mm, or only about a 1/4 inch bigger than the ball.
william
I think I would lose my mind before I ever got precise enough to make shots in a pocket with a 1/4-inch margin of error. If a ball is coming in at any angle other than 45 degrees to the rails, it's effectively even smaller than that. If you're coming in sort of close to the rail (along the rail wouldn't be possible) you'd have to hit the ball hard enough to compress the pocket facing to make a large enough opening for the ball to get through, so that explains the added speed.
The other thing is rule 24 mentioned above, if you fail to pocket a ball, multiple rails need to be hit or you need to cross the centerline, or various other confusing rules, so I think in case the ball doesn't drop, you need to have some speed left over to make sure you don't foul. Here's the rule:
24. Legal shot
Any shot (except the opening break) is considered to be legal (legally completed) if none of these Rules is infringed and additionally - after a collision (a contact) of the cue ball with one of the object balls any ball on the table's playing surface (the cue ball or any object ball):
(1) is pocketed, or
(2) rebounds off any cushion and thereafter: (a) touches another cushion, or (b) drives any ball to another cushion, or (c) touches any ball frozen to another cushion, or
(3) crosses the center line and thereafter: (a) touches any cushion, or (b) drives any ball to any cushion, or
(4) rebounds off any cushion and thereafter: (a) crosses the center line, or (b) drives any ball across the center line.
Failure to meet these requirements is a foul.
Notes:
1. All the elementary playing acts (collisions of the balls, rebounds off the cushions, crossings the center line, etc.) must occur only in the above-mentioned order. Otherwise it is a foul.
2. If the cue ball strikes the object ball that is frozen to the cushion, and this object ball rebounds off the cushion, strikes the cue ball in return and drives it to any cushion or across the center line, the shot is considered to be legal only if there were two separate collisions - cue ball/object ball and object ball/cue ball. Otherwise it is a foul.
3. A ball crosses the center line only if the center of the ball crosses the center line.
4. If a ball rebounds off a jaw ("a nose") of a side pocket and returns back to its half of the table, its center has crossed the center line at least once.