I am challenging people on this forum, who want to give critiques - to learn to see what they are seeing. To get an educated eye - I am challenging them to educate themselves - - - - so that they can help posters such as yourself who are asking for help.
First picture: Over-jumping probably because here heel has come up and made her leg unstable. Her foot is too far into the stirrup which could also be part of the problem. Shortening the stirrup a whole might allow her heel to drop further and help her stop over jumping. She has a nice back and is looking ahead. However she has a large bend in her elbow from leaning up the neck to much. It also looks like she had a rather tight distance.
Good job here and you are correct - but we forgot a couple of other things here.
Lower Leg -
The first thing that speaks out to me, is her knee pinching. When a rider has no solidity in their lower leg, they turn to their knees to lock them in their tack over a fence, which gives them that false sense of security, but when they do that - they destroy the links of solid form, and creates a domino effect of negativity.
So the first picture -
First thing I see, loud and clear is the rider jumping ahead drastically here. Her seat is way out of her tack, and her crotch is way over the Pommel of the saddle. Her bodies weight, is alllll on her horses forehand, which is making her horses job - even that much more harder, all the while, covering his riders patooie and getting his job done the best he can.
So lets ask - why is she doing this? Lets go down from her seat and see what is the problem.........AH! Knee pinching!! So lets ask, why is she pinching her knees? Lets look down more............No security in her lower leg - as we already established.
So by the rider not having their leg secured at the horses girth. By the rider being ontop of their horse instead of around *legs wrapped around girth* and because of the knee pinching and incorrect placement of the iron - the riders heels cannot anchor them - the leg flings back, and the upper body flings forward.
Also, another thing at play here - rider anticipation of the fence. What does this mean? This means that the rider is riding the fence, not their horse. They are so focused on the fence ahead - thinking about it, stressing about it, staring at it, trying to get to it instead of allowing it to come to them - which causes the rider to fling forward, out and ahead.
So again, what is the first thing I look at? The riders seat. Again, I see the seat way to far out of the riders tack and her crotch over the pommel. Her Bodies weight, again - on her horses forehand making her horses job that much harder.
So again - lets look to see what is causing this? Anticipation of the fence.
Right now - she is ontop of her horse, she is not around her horse. Also, she is not sinking into her tack, where isntead she is out of her tack.
So what does sinking into your tack mean? It means going down in your bodies motion, remaining with your horses center of gravity and movement - instead of going in an up and forward motion.
See how open her knee angle is here? Her knee angle should be much more closed.
She is riding the fence, not her horse.
Ok so lets start with her lower leg. Again, her leather length is correct, her iron placement is correct. Her legs are good - but I would rather see her around her horse, not ontop.
I would put her back over x rails and small fences. Remember - it is not the height of the fence that matters, is the the quallity of the fence that does.
You know the fence is there. Your horse knows the fence is there. So why on earth are you focusing on it? Focus on what is under you, not infront of you. Ride your horses rhythm, not the fence.
Focus on rhythm, tempo, straitness. Focus on where your body parts are. Allow the fence to come to you, not you to it. Allow your horse to do his job - that is not your place. Leave him alone!
Sit and wait for your horse to lift you out of your tack. Stop doing that job for him. He is much bigger and heavier than you are, so stop interfearing.
You are lucky to have a horse to continues over the fence for you. If you had a horse who didn't cover your tooshy, you'd of flown head over heels. Learn to secure yourself properly in your tack.
Stay centered, remain balanced and over your horses center of gravity. Sit and wait. Sink low, wrap around and close those knees - push your toosh back.
Your seat should be over the center of your saddle, and there should be very little space between your seat and your tack.
This is where a rider should be on take off for a fence: