Layout
- Exactly four times the 16 cells of 4×4
- Eight rows make container width a central usability constraint
A 64-target grid for inspecting target density and print/display scale while keeping a simple 1–64 ascending rule.
Your Time
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Click 1
Select Start and wait for the shuffled grid.
Select 1 through 64 in ascending order.
Review completion time and incorrect selections together.
Repeat only with the same setup when you want a personal comparison.
A 64-target grid for inspecting target density and print/display scale while keeping a simple 1–64 ascending rule.
Choose 7×7 for fifteen fewer targets and slightly wider cells.
Choose 9×9 only when you want 81 targets and can preserve readable labels on the current device.
These values come only from completed ascending rounds stored in this browser for this exact grid. Choose an input method to narrow the set.
No comparable attempts are stored yet. Complete several rounds with the same grid, device, input method, and rules before interpreting changes in your own history.
Device model, orientation, browser zoom, and display scale are not stored. Confirm those conditions yourself before treating two rows as like-for-like.
Use the tracker for filters and medians, or read why total times from different conditions should stay separate.