How are the cards shuffled?

Cards are shuffled using the Fisher-Yates (Knuth) algorithm. The random values come from window.crypto.getRandomValues for cryptographically unpredictable ordering.

How is the best score determined?

The best score tracks the fewest moves and fastest time separately for each grid size. Both are stored in localStorage and persist across browser sessions.

What happens when two unmatched cards are flipped?

Both cards are shown briefly (about 1 second) then flipped face-down again. The delay gives you a moment to memorize their positions before the board resets.

Is there a time limit?

No. The timer counts up from zero, tracking how long it takes you to match all pairs. There is no penalty for taking your time.

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Memory Card Game

Classic card-flip memory matching game with emoji themes, multiple grid sizes, and best-score tracking.

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About this tool

A fully browser-based memory matching game. Flip cards to reveal hidden symbols, then match each pair from memory. Choose from three grid sizes — 4×4 (8 pairs), 4×6 (12 pairs), or 6×6 (18 pairs) — and three card themes: emoji animals, emoji food, emoji sports, numbers, or letters. Cards are shuffled at the start of every game using the Fisher-Yates algorithm seeded from the Web Crypto API for true randomness. The game tracks your move count, matched pairs, and elapsed time. Personal best scores (fewest moves and fastest time per grid size) are saved to localStorage. Cards animate with a smooth CSS 3D flip on reveal. A victory screen appears when all pairs are matched, showing your final stats and best-score badge.

How to use

1 Select a grid size (4×4, 4×6, or 6×6) and a card theme.
2 Click 'New Game' to shuffle and deal the cards face-down.
3 Click any card to flip it and reveal its symbol.
4 Click a second card — if it matches the first, both stay face-up.
5 If they don't match, both cards flip back down after a short pause.
6 Continue until all pairs are matched, then check your stats on the victory screen.

Frequently Asked Questions

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