How to play

Choose a collection and a board size. All cards start face down. Select two different cards to reveal their pictures. This counts as one turn.

Find the pairs

If the pictures match, they stay face up. If they differ, both stay visible for three seconds and then turn back. During that wait the board ignores extra card selections. The Shorten wait button speeds a pending mismatch up to one remaining second.

Finish the round

Find every pair to complete the board. Fewer turns is better; elapsed time is a secondary comparison. New round shuffles a fresh board and clears any pending mismatch. Changing collections or size also starts a fresh round.

Keyboard, touch, and sound

Use Tab to move between controls and cards, then Enter or Space to activate a focused card. The scrollable board can be reached with the keyboard. On narrow screens, larger boards scroll so the cards remain usable. Sound is optional and can be switched on or off. Color Studies uses objects with distinct shapes and textures as well as colors.

The daily challenge

Play one shared 4×4 board each day. The collection and shuffle are determined by the UTC date and collection version. A new challenge arrives at 00:00 UTC. Replaying uses the same board; it can improve your local best but only counts once toward your streak. Finishing on consecutive UTC days extends the streak. Missing a full UTC day resets it. Choose Back to free play to change collections or sizes.

The copy-result button copies a short score summary and a link to today’s challenge. It does not automatically post anything or reveal the card positions. No account or public leaderboard is involved.

Your personal best

Best results are stored in this browser when local storage is available. They are personal results rather than a global leaderboard. Clearing site data removes them, and a private or embedded browser may use different storage.

Round rating

After finishing a board, see how often you chose a matching location you had already seen, how efficiently you used your turns, and how quickly you made decisions. Forced waits and decisions interrupted by a hidden tab are excluded from pace. A match between two new cards counts toward completion and turn efficiency.