CSSBattle vs Project Euler
CSSBattle
cssbattle.devProject Euler
projecteuler.netSide by side
| Figure | CSSBattle | Project Euler |
|---|---|---|
| Price from | $4.90/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Plans published | 5 | 1 |
| Spec score · Coding Challenge Platforms | 8.1 (#10) | 7.2 (#23) |
| Audience | The makers describe CSSBattle as made for people who have coded in HTML and CSS, while saying beginners can also start learning those technologies. | The problems are aimed at students, adults interested in mathematics, and professionals who want to keep their problem-solving and mathematics skills current. |
| Security | The privacy page says the website works strictly over HTTPS and submissions are inaccessible to other players except on Open Targets or Daily Targets. | The site says connections use HTTPS and that passwords and account recovery keys are hashed using PHP’s one-way password hashing algorithm. |
| Support | The site lists [email protected] and directs users with questions to its community forum or social account. | Privacy or security concerns can be sent to [email protected]; other queries are directed to the alternative forum. |
Plans
CSSBattle
- CSSBattle FreeFree
- CSSBattle PLUS Monthly$4.90 a month
- CSS Learn Basic$13, paid once
- CSSBattle PLUS Yearly$59 a year
- CSS Learn Intermediate$100, paid once
In their own words
CSSBattle
CSSBattle is a web game for practicing HTML and CSS by rebuilding target images with the shortest possible code. Scores reflect both visual similarity and character count. You can open targets and write code without an account, but logging in is required to submit and receive a score. A new Daily Target appears at 00:00 UTC; these daily challenges have no leaderboards. Battles use separate targets and leaderboards, while private Versus battles support one-on-one challenges with friends. Submissions cannot use JavaScript, SVG, images, or external assets, and are rendered in a headless Chromium browser on Ubuntu 18.04. Learn courses add interactive levels and quizzes for beginners, intermediate learners, and experts. The free plan permits only the current day’s target. PLUS adds more than 1,100 past Daily Targets, top solutions, plugins, statistics, search and sharing, unlimited history, and a VSCode editor. CSSBattle Free costs nothing; PLUS costs $4.90 a month or $59 a year.
Project Euler
Project Euler has no write-up on Specifiction yet; its figures are above.