Grit & Grain · Top score · All-time

• Tap or click the flawed sample, or press ← or ↑ for the first and → or ↓ for the second, before the fuse burns down.
• Keep picking right to grow your streak multiplier up to ×4; a wrong pick or a burnt-out fuse is a strike.
• Last the 90-second clock without three strikes for the best score.

• Do not comb both cards inch by inch. Rest your eyes on the middle of one card and let whatever breaks the pattern jump out; if nothing does after a moment, it is probably the other card.
• Learn each material's flaw: a long bar in the weave, a gap in a tree ring, a wedge of grout around a tile, a lump in the sandpaper, a fat dot in the halftone. The label above the cards tells you which one is coming.
• Speed is worth up to double points, but a strike costs your whole streak multiplier. On the subtle later rounds an extra half second is cheaper than a wrong guess.

All-time keeps each player’s best since the board opened. This week starts again every Monday at midnight New York time.

Equal scores share a place, and the run finished first is listed first.

A run records only your inputs. Our server plays them again with the same game code, and only a score the replay matches is verified.

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