How tough is St Andrews Old Course?

How tough is St Andrews Old Course to play?St Andrews Old Course has aSlope Rating of:Men– 129Ladies– 138How difficult is St Andrews Old Course for a good (scratch) player?St Andrews Old Course has aCourse Rating of:Men– 71.4With a par of 72, scratch golfers (with a handicap index of 0) are likely to post a score of -1Ladies– 75.5With a par of 76, scratch lady golfers (with a handicap index of 0) are likely to post a score of between par and -1How hard is St Andrews Old Course for an average (bogey) player?The Old Course has aBogey Rating of:Men– 95.4With a par of 72, average golfers (with a handicap index of around 20) are likely to post a score of +23Ladies– 108.0With a par of 76, average lady golfers (with a handicap index of around 24) are likely to post a score of +32How does St Andrews Old Course compare with Carnoustie and Kingsbarns?For men, Carnoustie Championship course and Kingsbarns are both more difficult overall than St Andrews Old Course.Men– Carnoustie has aSlope Rating...