i Register
In some senses, kayles is marked as obsolete. Watch for register when choosing this word.
noun
The game of skittles or ninepins.
Playing kayles, i.e. throwing a stick at ninepins, at Smithfield, 13th century.
A simple impartial game in combinatorial game theory, in which players take turns to knock out one pin or two adjacent pins from a line of imagined bowling pins.