@is_in_play

Type:Bit
If contains 0 the race is not in play, if 1 the race is in play.

Example:

<place condition="@is_horse_selected=1 and @is_in_play=0" price="@best_back_price" size="2" />
When the horse is checked, places at the best back price of the horse a bet of size 2, only if the race is still not in play.