Quote:
Originally Posted by my miss storm cat
It may not exist?
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Try putting that poster on ignore.
The concept is really very simple. The speed of the track can change during the day....just as it changes from day to day. There are obvious reasons for this.....rain during the day is the most blatant. A significant change in wind conditions is another. Also, perhaps a track is watered excessively and/or raked differently at some point in the middle of the card. This, too, could change the speed of the course.
However, why only helps explain how it happens. The simple fact is it does happen....and in order to make accurate speed figures this has to be taken into account. There can, and will, be disagreements over the specific usage of split variants but it is logical to understand that they exist.