Back here in the south (Visayas and Mindanao) we have this kind of play also. But this is not the most popular one. We played the one that has cloth (very thin) on it and is usually colored green. It has also six holes but each holes is pre-numbered and has therefore six different numberings namely, 2,4,6,8,10,20 the 10 and 20 is both on the center pockets. There is a drawn rectangle that would fit the 15 very small marbles. Yes we're using marbles instead of discs. The CB is of different color
compared to the other marbles which has of course one color.
And like what Blowfish has mention each side has an equal 1" (one inch)
parrallel on all sides. Because it would be very difficult to shoot
when the ball kisses the rail. So you could move the CB right at the
one inch line.
For one on one game we usually played by racing to the first 32 points.
Whoever first got the 32 points win. Let's say you shot one marble in
hole 20 and one on hole 8 and one in hole 4 then you're done.
For multiple players there are many variations. But to mention one
we play what we call "bulletin" (as mention by Edwin) we put 15 small
circle out of slippers (or tsinelas in Filipino) and it is also pre-numbered
from 2 to 30 all even numbers (2,4,6,8...30). And those 15 rubber circles
are put inside a bottle usually made of plastic and usually a bottle
from ketchups. Then we get the small rubber circles in turn by drawing from it; usually shaken vigorously. And hide it for yourself to play and nobody should know it except you. The first player breaks the triangled marbles usually slowly so as not to end the game right away. Let's say if you get number 30 you need only the hole with number 2 on it. Otherwise if you make a ball (or a marble

) bigger than 2 you are "paso" you go beyond the 32 points and you will be officially out until the next game. If you get 20 for example then you need 12 in which you need at least 2 holes, for example holes 10 and 2.
This where i and many other pool players from the south learned first
the game of pool and/or money games before moving to what we call "billiard" or "bilyard" in Cebuano or "bilyar" in tagalog and which is "pool" in reality. You could ask Warren Kiamco or Gaga Gabica for that.
Anyone has played this one before?