This is just a recent occurrence. Over the years, I mean years of signing into yahoo and other platforms, dealing with reCAPTCHA, it's never been an issue until a few weeks ago. The system has gotten glitchy where the very thing they are asking you to do, will cause you to not be able to pass the reCAPTCHA and stop a person from logging in. Take for example they say pick all the motorcycles. You pick all the images but there two motorcycles and by picking the other or picking the rearview from the motorcycle or a small corner of it, it says you're wrong. This has stopped me from signing in for several days and a friend of mine had similar problems. Plus these images are very grainy or low light, increasing the mistake. There are other systems that don't have this issue or it's easy to identify, such as Twitter not robot check or there are a few platforms that you simply slide an image to the correct position. The current system sucks where my friend has already abandon the service because they are feed up with the situation. Hope you guys fix it.