Challenge Ladder
Climb the ladder
One server-scored security challenge each month. Your best score ranks you on the public top-10 — for the month and for the year. Scores are graded on our servers, so the board is real.
Play: Challenge of the Month — October 2026 →
8 questions · ~10 min · free
Leaderboard
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Your leaderboard identity
Sign in and play the challenge to appear on the ladder. We only ever show a handle you choose — never your email.
Only players who choose a handle and opt in appear on the public leaderboard — we never show your email. A new challenge is published each month; the leaderboard resets monthly, with a running yearly board too.