Play N-back

N-back lights positions on a 3×3 board. Decide whether the current light matches the one from n steps earlier. The first n positions are observe-only.

Best when: you are about to do work that needs holding information in mind.

• Prioritize accuracy; match trials are naturally rarer.
• Stop after one round and use the focus on real work.
• Alternate with Schulte across days if you like.

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