Billiard table all six pockets), with rounded entrances and nearly parallel sides, like those on a snooker table. One tactical consequence of this design difference is that the jaws of the WPA-type pocket are often used exactly like a horizontal version of the backboard of a basketball goal, to rebound the ball into the pocket; this technique does not work on blackball tables, and even shots down the cushion into a corner pocket are more difficult. For tournament competition under WPA world-standardized rules (and league play under derived rulesets), the bed of the pocket billiard table must be made of slate no
Billiard table midpoint between the bottom and top ; the or , located midway between the centre spot and the top cushion; and the or , located at the midpoint of the baulk line (and, thus of the "D"). Due to its obviousness, the brown spot is not always marked (neither are the unmistakable and , at the left and right intersections, respectively, of the baulk line and the "Ds curve. The exact placing of these markings are different on smaller tables, but proportional to the full-size model. The of a good quality snooker table has a of slate and is covered