Illegal screen?

[Jurassic Referee]

If B2 jumps in front of A1 from the side, use NFHS rule 10-6-3(c)- "A player who screens shall not take a position so close to a moving opponent that this opponent cannot avoid contact by stopping or changing direction. The speed of the player to be screened will determine where the screener may take his/her stationary position. This position will vary and may be one to two normal steps or strides from the opponent".

If B2 stops in front of A1 and they were running in the same path, use Rule 10-6-3(d)--"A player who screens shall not, after assuming his/her legal screening position, move to maintain it, unless he/she moves in the same direction and path of the opponent. When both opponents are moving in exactly the same path and direction, the player behind is responsible if contact is made if the player in front slows up or stops and the player behind overruns his/her opponent". If that's what happened, then the correct call is no call for a legal screen. If A1 tries to plow through B2's screen though, then the correct call is a foul on A1.