can you knee a ball back to the goalkeeper
Back-pass rule While not an infringement of the back-pass rule, players are also prohibited from using a deliberate trick to pass the ball to the goalkeeper with a part of the body other than the foot to circumvent the rule. This would include, but not be limited to:
National Hockey League rules New since the 2005–06 NHL season, after testing in the American Hockey League, a trapezoid is marked behind each goalie net. The goalie can only play the puck within that area or in front of the goal line. If he plays the puck behind the goal line and not in the trapezoid, a 2-minute minor penalty for delay of game will be assessed by the referees. This rule is widely referred to as the "Brodeur rule", after New Jersey Devils goalie Martin Brodeur, whose puckhandling behind the net is believed to be the cause for the rule.[2][3] In 2014, the NHL lengthened the goal-line side of the trapezoid by two feet on both sides of the net.[4]