| C | ↗ | B | Captcha improved |
| C | ↘ | D | Captcha::build() got worse |
| B | ↛ | Captcha::distort() removed | |
| A | ↛ | Captcha::hash() removed | |
| A | ↛ | Captcha::getStoreName() removed | |
| A | ↛ | Captcha::has() removed | |
| A | ↛ | Captcha::store() removed | |
| A | ↛ | Captcha::get() removed | |
| A | ↛ | Captcha::remove() removed |