4×4 GRID · 15 ROUNDS
Find the one symbol that is different before the timer runs out.
Complete 15 timed grids. Wrong picks and timeouts count against accuracy.
READY?
Choose the single different symbol in the 4×4 grid.
Keyboard: 1–9 select cells 1–9; Q W E R T Y U select cells 10–16 · Touch or mouse: choose any cell
HOW TO PLAY
Start a run and scan all 16 symbols without staring at one corner.
Select the only different shape by touch, mouse, or its visible keyboard key.
Finish all 15 standard rounds, or survive the shrinking endless deadline with one life.
VISUAL SEARCH SPEED
Each grid asks you to compare many nearly matching symbols, notice one structural difference, and map its position to a response. It combines visual scanning with choice reaction speed.
The odd symbol changes shape as well as position, so finding it never depends on color alone. Standard mode counts every pick and timeout across exactly 15 rounds.
READ YOUR RESULT
Average and best times use correct responses only. Accuracy includes wrong selections and timeouts, so guessing quickly can lower your overall result.
Screen size, input latency, and viewing distance affect reaction time. Compare repeated runs on the same device and with the same input method.
QUESTIONS
The timer starts when a new 4×4 symbol grid appears and stops when you select a cell. Average and best time include correct selections only.
In standard mode, the round advances and accuracy falls. In endless mode, the first wrong selection or timeout ends the run.
Number keys 1 through 9 select cells 1 through 9. Q, W, E, R, T, Y, and U select cells 10 through 16. Every cell shows both its number and key.
Yes. The grid scales to small screens and every cell is a large touch target. Desktop players can also use a mouse or the displayed keys.