Perceptual speed

Code Match

A clerical-checking drill against a shrinking clock. One reference code, four near-identical candidates, one exact match. The others each hide a swapped pair or a lookalike character like O for 0. Thirty rounds, and the window closes as you go. A staple of trading-firm cognitive assessments.

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Mode

Pressure

Thirty rounds of spot-the-match: one reference code, four candidates, one identical. The clock shrinks from 5 seconds toward 3 as you go.

Upgrade to unlock Pressure mode.

Session

30 rounds, one code each. The decision window starts at 5 seconds and shrinks as you go, miss it and the round counts as a timeout.

Start session

Performance

This mode

highest score / min

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attempts

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Track your best scores and watch your accuracy climb across every session.

Settings

Performance

Frequently asked questions