Understand reCaptcha v2 analytics

[Aurélien Bourillon]

Hello,

I sollicitate your help. After severals Google searchs, I still not understand reCaptcha v2 analytics charts, especially the Request Passed & Failed chart.
I use both invisible and checkbox reCaptchas in two separate flows. No matter the reCaptcha viewed, the chart shows three columns:

• No Captchas: For invisible reCaptchas, I undertsand that it represents passed captchas with no user action. But for checkbox reCaptchas, I'm lost on the meaning.
• Pass: For both invisible & checkbox reCaptchas, I understand that it represents passed captchas with an action from users.
• Fail: For both invisible & checkbox reCpatchas, I understand that it represents failed captchas with an action from users. But documentation says "The failed number does not necessarily mean the user did not eventually solve the challenge. It also shows how many times no CAPTCHA was shown because reCAPTCGA was confident that the request was legitimate.".

Is someone can help me and explain me the meaning of each category?
In advance, I appreciate your help. Thanks.

Regards,