8
St Andrews (Old Course) had 12 holes by 1764, and probably much earlier. The holes were laid out in a line and 10 holes were played twice - once 'out' and once back 'in', making a 'round' of 22 holes. However, in 1764, the golfers decided to combine the first four holes into two, which produced a round of 18 holes, though it was really 10 holes of which 8 were played twice. By 1857 however, St Andrews had put second holes in the 8 double greens of the Old Course, creating a proper round of 18 holes, and in 1858 the St Andrews club laid down a round of 18 holes for matches between its own members.