KeyCaptcha - is a kind of irregular captcha, where, instead of entering symbols displayed on captcha image, you have to assemble a puzzle, moving its pieces on screen.

It looks like this:

You can see the example here on the KeyCaptcha website: keycaptcha.com

Since KeyCaptcha requires mouse movement events to solve it, you should have ZennoPoster ver 5.9+ and active subscription to CapMonster2.

To recognize KeyCaptcha in ZennoPoster, add the following C# snippet to your project:

ZennoPoster.CaptchaSpecialRecognition("keycaptcha.dll", instance);