what is a 7-10 split

A 7-10 split in bowling occurs when the bowler is left with just two pins standing, the leftmost (7 pin) and the rightmost (10 pin) in the back row after the first ball. This split is one of the most difficult to convert into a spare because the pins are as far apart as possible, requiring the bowler to knock one pin so it bounces or slides across the lane to hit the other pin. It is also known as "goal posts," "bedposts," or "snake eyes." Converting the 7-10 split can be done in three ways: striking one pin so that it bounces out of the pit and hits the other, striking one pin on the inside with enough force to bounce it off a side wall (kickback plate) into the other pin, or sliding one pin into the other, with the last being extremely rare. Only a few professional bowlers have successfully converted this split on television, highlighting its extreme difficulty.