Block: --/5
Rung: 1-back
Score: 0
Best: --

N-Back Ladder

Squares light up one by one. Does this one match the square N steps back? Climb from 1-back to 4-back, with letters at the top rungs.

5 blocks of about 45 seconds · 6 rungs

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N-Back Ladder

Squares light up one by one on a 3×3 board. Press Match when the square is where it was N steps back. Five blocks of about 45 seconds; a strong block climbs a rung, from 1-back up to 4-back, with letters added at the top rungs (dual mode).

5 blocks
Working memory

How to play

Watch the board. A square lights up every 2.5 seconds (or 3.3 at relaxed pace).
Match N back. Press Position match (A or ←) when the square is in the same place as N steps back.
Dual mode. From rung 4 a letter shows too. Press Letter match (L or →) when the letter repeats N steps back.
Climb. Catch most matches with few false alarms to go up a rung; a weak block steps you down.

Quick tips

Say it in your head. Name each square ("top left, centre, centre") and keep a rolling list of the last N.
Don't mash. False alarms cost points and drag your grade down. Only press when you're fairly sure.

3 more tips in the N-Back Ladder guide →