the first thing you should notice about this is that it has clearly been designed to be almost impossible to crack, by someone who knows nothing about cracking captchas. For example, the uniform background colour. Well over 90% of the image is a single colour and every pixel of every letter is that colour. Then, the individual letters are outlined in distinct and uniform colours, and then, as if that wasn’t helpful enough for crackers, the characters are made up of little square elements (which I will call ‘charels’), so we can reconstruct the characters down to the pixel, generally the right way up. It really couldn’t be more helpful if it tried.