Brain Game

How to play: Tap a card to flip it, then tap another. If the two match they stay open; if not, they flip back. Clear the whole board in as few moves and as little time as you can. Choose 4×4 (8 pairs) or 6×6 (18 pairs). 4×4 6×6 Moves 0Time 0:00 New game How it counts: A move is one pair of flips. The timer starts on your first flip and stops when the last pair is matched. A perfect 4×4 game is 8 moves (only possible with luck); 12–16 moves is a good score. On 6×6 the minimum is 18 moves; anything under 35 is solid if you focus on remembering positions. Your best score for each size is kept in this browser only. ...

How to play: Tap the box to start. When it turns from red to green, tap again as fast as you can. Do 5 tries to get your average; tapping while it is still red restarts that try. Your personal best is saved in this browser. Tap to start Wait for green, then tap 5 tries per round –Average (ms) –Best this round (ms) –Personal best (ms) New round Clear personal best Typical results: under 200 ms is very fast, 200–300 ms is average for a phone tap, over 350 ms is slow (or you were distracted). How it measures: The timer starts the instant the box turns green and stops on your tap (pointer down, so it does not wait for the release). Results include your screen’s refresh delay and touch latency, usually 10–40 ms, so compare against yourself rather than lab figures. The random red delay (1.5–4 s) stops you from guessing the timing. ...