This shot is nowhere near a 10,000 to 1 or even a 100 to 1 shot. More like 10-1 as
@Bob Jewett noted.
Still very impressive to play and pull it off in that situation. The traffic on the table makes it more impressive.
I have made it multiple occasions on League, shooting fun in a bar and even gambling.
A good player told me to work on weird (stuff) when I was bored or having a rough practice day because it would keep me on the table at least. This is one of the shots I worked on.
I developed a system. I think almost any player in this thread, once they try it a few times to get familiar with it will hit it within 10 shots.
One time I was gambling at Kobly's Corner Pocket in Tempe and I was on the hill. My opponent rolled up on the 9-ball and didn't have a shot so he corner hooked me with the 9-ball on the same end rail about a diamond out of the pocket a few inches off the rail.
I played this shot and made the 9-ball. He was very upset. He bet me double or nothing that I couldn't do it again if he gave me 100 tries. I made it again on the third try.
And that was on a pool table with sharp points. This is a Chineses 8-ball table with smooth points. I think that would make this shot easier but not sure.
The key is 'fine' aiming and it varies by table.
If the table has 'firm' rails and is well-aligned, if you put the CB on a line from the point to the corner pocket and shoot CCB to the point, it should come roughly straight back at the corner pocket. It won't, but that's how you measure the variation. If you shoot this shot a few times and it always hits the first diamond on the long rail then you know something.
To aim this shot, I imagine the top of my cue as a clock face with 12 on the top center. Then, in the picture of the shot, I put the 1 on the point. Then the 2. Then the 3. Then the 10, 11, 12.
Then I move the CB farther from the point-corner pocket line and shoot the same 3 references.
That will give you a good idea of how much off of center you can hit the point and what the CB will do - for that particular table.
There are three general paths you want to remember. The one to bring the CB straight back at the pocket. The one to hit around the 2nd diamond that will send the CB to the opposite corner - and the one around the first diamond where the CB will come off the end rail around the 2nd diamond for a 2-rail hit on a ball off the rail by the corner. And the one that sends the CB across to the opposite side pocket.
Surprisingly, most well put together tables will be pretty consistent.
I wish I had time to do some diagrams today but I do not.
There is another phenomenon here that helps. The further off-center you hit the point, the more English is applied to the CB. So even though it will come straighter across the table, it will have more spin and spin towards the corner pocket. Closer to center, less spin. So, in addition to having a larger target area with the ball in the pocket, you also have some other physical effects that help enlarge the margin for error.