6 posts in Practice
Typing Tells: How AlgoArena Reads Keystrokes for Fair Play
The same keystroke timeline that powers ghost battles also keeps competition honest. A look at why behavior, not code, is the signal, and why we keep the details private.
Arena 90 and the Ghost Ladder
How the 90-node campaign, medal progress, and ranked ghosts turn practice into a visible progression loop.
Roadmaps, Libraries, and a Larger Problem Bank
A product note on turning a growing challenge catalog into searchable practice, structured roadmaps, and shared material for classrooms and assessments.
Keystrokes, Puzzles, and Explainable Feedback
A January product note on keystroke replay, stronger puzzle validation, AI interview polish, and feedback that explains more than pass/fail.
Profiles That Show the Work
Profiles and dashboards became a better record of practice: activity history, solved stats, skill views, language use, and progress toward the next rank.
Puzzle Rush Becomes a Real Mode
Puzzle Rush moved from side activity to a fuller practice loop with queueing, timed sessions, battle-style UI, and cleaner problem repetition rules.