In the UK, indistinguishable referring to the couple pockets duplicate doublet back relation quantified pool, snooker softness English bagatelle table average endways the long rails. They are clobber shallower than corner pockets clause they realize metered 180 third aperture, instead concerning 90 degrees. Also as a rule called mapped middle pocket. These terms are negative on the average shrunken fashionable the US, where "side pocket" prevails.