The release rule is rarely enforced in club play unless abuse is suspected, however in major tournaments it is strictly enforced; the "eye on the hog" sensor in the stone will indicate whether the stone has been legally thrown or not.
The release rule is rarely enforced in club play unless abuse is suspected. However, in major tournaments it is strictly enforced; the "eye on the hog" sensor in the stone will indicate whether the stone has been legally thrown or not.