In play by play what do the codes “b-H” and similar mean?

When I look at the game’s play by play I notice a Column that has codes such as “b-H” and others similar. What do those codes mean? I am trying to figure out if a home run came off the pitchers card or the batters card. Thanks

b=bat position
1= 1st base
2=2nd
3=3rd
H= home

So it details batter and runners moving. (if I'm not wrong)

"b-H" means literally "batter to Home"

Homerun or a Double and two base error, "b-H" would be listed.

1-H is runner on first to Home, etc. "b-0" is batter out. Always thought it funny that a small o is used for runners out but a 0 (zero) is used when batters are out.