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Start at 1 or A. Fill every cell with the two lines.

Draw the Number line from 1 through its numbered clues and the Letter line from A through its lettered clues. The lines cannot share cells, and together they must fill every cell.

How to play

Guide both lines

Start at 1 or A and follow each sequence in order.

Fill together

Cover every cell between both lines. They cannot share a cell or cross a wall.

Keyboard: N/L selects a line, arrows move, Enter starts, Backspace undoes, H hints, and R clears.

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With Google Analytics enabled, Twain sends gameplay milestones, completion and stage times, hints, mistakes, streak totals, and interface settings. Enhanced Measurement also records page views and, when applicable, scroll depth, outbound-link clicks, site searches, video engagement, file downloads, and form interactions. Google Analytics also receives page and link metadata, cookie-based pseudonymous identifiers, and basic device, browser, and approximate location data.

Custom gameplay event limits

Twain’s custom gameplay events exclude puzzle paths, individual moves, puzzle seeds, clue values, names, email addresses, account IDs, and free-text input. Enhanced Measurement may send the page and interaction metadata described above when applicable.

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