Daily puzzles
SWEDLE
Six daily puzzles for engineers—Langdle, a growing code snippet, then bracket repos and IPOs, Big‑O, and tech milestones in time. A new set at UTC midnight; no account.
🔤 Langdle
Guess the language from paradigm, platforms, year, and more — green means exact, orange means close.
🔍 Reveal
A code snippet hides in the shadows — wrong guesses pull back the curtain until you name the language.
⭐ Star Battle
Famous open-source projects and GitHub star counts — pick the repo with more stars in five daily matchups (fixed snapshot for everyone).
📈 IPO Showdown
Tech company IPOs — compare opening valuations and who listed earlier in five head-to-heads using rough, static figures (not live markets).
🧮 Big‑O Blitz
Time and space complexity for real algorithms and data structures — five multiple-choice picks for the tightest Big‑O bound.
⏳ Chrono Commit
Moments from computing history — releases, launches, and milestones. Decide which happened first across five daily comparisons.