Find and click the numbers in order starting from 1 — as fast as you can, without mistakes.
Why it matters
Holding focus on a repetitive, outwardly boring task is one of the hardest mental skills in sport — the same thing happens during a long tennis match or a full round of golf, when attention has to stay sharp even in moments with no action. A bigger grid means holding concentration for longer without losing pace.
The ability to sustain focused attention on a repetitive visual task over a longer stretch of time, without it "switching off" or getting distracted.
Athletes in disciplines with long duration and high concentration demands (tennis, golf, shooting), and anyone who wants to train their attention endurance.
Reference times by grid size
Set the grid size freely from 3×3 to 15×15 with the slider — the reference times above are just examples; the app computes them for your chosen size right above the slider. Based on the classic Concentration Grid exercise (Harris & Harris, 1984) used in athletes' mental training, with an adjustable grid size following the model of digital implementations (e.g. cgridid.com). Comparing against your own previous result at the same size is the most meaningful benchmark.