Neat idea, but is this something you can actually be skilled at? Even if you know the game, and can figure out what trajectory the ball was on, it seems very hard to figure out exactly where on that trajectory it was when the photo was taken, given the high speed of the ball.
As I have mostly scores in the vicinity of 95-99%, yes indeed you can. In the UK and I think many other countries where soccer is popular, 'spot the ball' games have been a popular newspaper and prize competition entertainment for many years, probably long than I've been alive. It also helps to have played a lot as a kid and have a basic intuition of how the game is played.
following the eyeline of players (and sometimes background observers) is the most basic clue, but it's also important to remember that in soccer you're not allowed to touch the ball with your arms or hands if you can possibly avoid it, so when you see a player's stiffened arm you can often guess that they're fighting to avoid an accidental contact that would result in play being interrupted by the referee.
It's not a very useful skill but I hope that soccer gets much more popular in the US as I might be able to win some easy prize money if spot-the-ball competitions become popular. Or for a small fee, I will be happy to provide individual tuition in this potentially lucrative derivative sport :)
After logging many thousand of hours of dutifully watching soccer (over 30 years of full-on love for the game), I was able to match the given situations to similar ones I'd seen before and get close enough most of the time. It's still all probabilities at the end of the day.
Following the direction players are looking is just one parameter and can be wildly inaccurate without any information on the angle and velocity of the ball at the time of the shot.
One of the trickiest situations is when 2 players jump for the ball, usually coming from a goalkeeper's clearance, so high and fairly fast, and collide in the air (often closing their eyes): the ball could literally be anywhere.
That's kind of the genius of puzzles like these (we can't take credit for inventing it - Spot the Ball has existed for a long time in the analog world) is that it's a mix of skill and luck, so you can fool yourself into thinking you're amazing at it, when in reality the next photo might trip you up completely.
I can relate. I mostly ended up around 55% overall per round (only slightly above average) but I did get a 100% score on one photo which made up for some spectacular fails.
Couldn't you? It seems like if you were skilled enough you could figure it out by the reactions of various players in the photos with more than one or two people in them.
Trying to triangulate based on where players' eyes are looking rarely works. In many cases, the goalie is looking in a completely different direction than where the ball is. I guess that's why they're getting scored on.
Don't forget that the ball can come very fast and the keeper will need a split second to adjust. In other cases, the kicker can be masked by another player preventing the keeper to see the ball until very late.
