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A quick switching game

Tandem.

1, A, 2, B…
Keep the rhythm.

Two sequences, one trail. Switch between numbers
and letters as fast as your mind allows.

  1. 1
    Start at 1

    Then A, 2, B, 3, C. Alternate all the way.

  2. 2
    Mind the switch

    A wrong tap breaks your chain.

  3. 3
    Pick your pace

    Four difficulties, or a 60-second Sprint.

Sprint personal best0
SPRINT · LEVEL 1 · EASYBEST 0
Score0
Next1
Seconds60
Chain 0 1×1 to Medium
60 seconds · Easy to Harder

Ready to switch?

1 → A → 2 → B → …

Level up as you clear boards. A miss costs 2s; hints reset your chain.

1, A, 2, B… KEEP THE RHYTHM.

Switch, don’t slip.

Tap the tiles in order, alternating between the two sequences: 1, then A, then 2, then B, then 3, and so on until the board is clear. Numbers are indigo, letters are pink.

A line traces your trail. The Next chip always shows the tile to find, but you have to keep your place on the board.

Easy, Medium, Hard, Harder
Easy is 3×3 (up to 5 and D), Medium 4×4 (up to 8 and H), Hard 5×5 (up to 13 and L). Harder is 5×5 too, and two tiles you have not found yet swap places after every correct tap. The stopwatch starts when you reveal the board; your best time for each difficulty is kept on this device.
60-second Sprint
Start on Easy. Clear one board to reach Medium, three for Hard, five for Harder. Each cleared board brings the next one automatically.
Scoring
Each correct tap earns 10 points times your multiplier, which grows every 10 correct taps in a row, up to 4×. A cleared board adds 5 points per tile, doubled if you made no misses and used no hints. A miss costs 2 seconds and resets the chain; a hint resets the chain too.
Play with a keyboard
Tab to a tile. Use arrow keys to move, Enter or Space to tap, and Escape to pause. Switching tabs or windows also pauses.