Games
Charge your brain.
Six short games that test your memory, ear, reflexes and focus.
01 06
Color
How precisely can your eyes remember a colour?
01The gameColorMemorise 5 colours and rebuild them.
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02How it works5 colours will appear, 3 seconds eachThen rebuild each with hue, saturation and brightness
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03The challenge10 points per colour, 50 in totalScored with ΔE — the colour-difference measure used to calibrate printers and displays.
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02 06
Time
Your inner clock against the real one.
01The gameTimeFeel 5 durations and repeat them without a clock.
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02How it worksThe mark lights up for a while — feel how longThen press and hold for the same time
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03The challengeNo clock, only instinctMost people cut long durations short and stretch short ones — which way do you lean?
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03 06
Sound
Pitch memory — no instrument needed.
01The gameSoundHear 5 tones and find their pitch.
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02How it works5 tones will play — headphones helpThen find each frequency with the slider
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03The challengeReplay your guess as often as you likeTones range from 150 to 1600 Hz, spread on a musical (logarithmic) scale.
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04 06
Reaction
One flash. How fast are you?
01The gameReactionTap the moment lightning strikes.
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02How it worksWhen the pad turns dark and the mark flashes, tapTap too early and the attempt restarts
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03The challenge5 attempts, average time countsA typical visual reaction takes about 250 ms — anything under 200 is lightning.
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05 06
Energy count
Count what you only glimpse.
01The gameEnergy countCount the marks that flash for an instant.
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02How it worksMarks appear for a split secondGuess how many there were
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03The challengeMore every roundUp to about four items the brain knows the number without counting — beyond that it has to estimate.
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06 06
Packet route
Route a packet like a network engineer.
01The gamePacket routeDeliver the packet with the lowest ping.
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02How it worksThe packet starts at the server on the leftClick neighbouring servers to route it to the target
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03The challengeNumbers on links are latency (ms) — keep the total lowThe best route is found with Dijkstra’s algorithm — the same idea routers use to pick paths.
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