PATTERN MATCH · 20 ROUNDS
Compare two 4 × 4 pixel patterns, then decide whether they are exactly the same or different.
Complete 20 timed rounds: 10 same and 10 different. Mistakes and timeouts still advance.
READY?
Press S for same or D for different. You can also tap a labeled button.
Keyboard: S = same, D = different · Touch or mouse: use either labeled button.
HOW TO PLAY
Start a round and compare the two 4 × 4 pixel patterns side by side.
Choose same only when every filled cell is identical; otherwise choose different.
Finish all 20 standard rounds, or protect a perfect endless streak as the timer shrinks.
VISUAL COMPARISON
Each round combines visual scanning, short-term comparison, and a two-choice reaction. Different pairs use clear one-cell or multi-cell changes—never rotations or mirrored tricks.
This is a recreational browser game, not a clinical assessment. Display size, input delay, attention, and practice can affect your score.
READ YOUR RESULT
Standard accuracy includes every response and timeout across 20 rounds. Average and best times use correct answers only.
For a fair personal comparison, repeat the same mode on the same device and use the same input method.
QUESTIONS
Exactly 20: 10 same pairs and 10 different pairs. A mistake or timeout counts and moves to the next round.
Some pairs differ by one clearly changed cell and others by several. Patterns are shown in the same orientation, with no rotation or mirror ambiguity.
The first deadline is 2.5 seconds and gradually falls to 550 milliseconds. One wrong choice or timeout ends the run.
Yes. Tap the two large response buttons. Desktop players can use S for same and D for different.