She is a blk and white paint,she is an Overo paint.Overo is the color pattern.
I had 6 horses! A pony,my daughters App and barrel horse(she moved and took those two with her)and 2 Buckskins that where older horses,22 and 25 and a TB.I downsized to only 1 horse since we are moving and will not have room for them all.Both old guys went to retirement homes 
Actually from what I can see in your pics she looks like she should be a Medicine Hat Tovero as her spots are not irregular. She's a medicine hat because she has a bonnet/war hat over her ears. It looks to me like she shows characteristic
s of both Tobiano and Overo. I've become almost an expert on markings since my stallion was born and I had to argue with the association about his coloring. He's marked Tobiano but has white over both nostrils making him technically a bald face according to their standards...an
d the bald face is an Overo trait.
Here's a pic of my Overo mare, notice the jagged/irregularness of her markings and the color on her legs? (oh and the idiots that registered her marked Dun, she's not a dun...haha)
If your mares markings aren't irregular like that and she has white on her legs then she's def. Tovero (they are the rarest of the 3 pattern categories) and it can be hard to tell sometimes and are normally registered as Overo or Tobiano. White legs is a Tobiano trait. My friends medicine hat mare was registered Tobiano but she's so old that when they registered her all the apha had was tobiano or overo.
ok i'll hush now... Enough about paint pattern lessons.
