Time
0.0
Best
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Connect 1 → A → 2 → B → 3 … to 13, alternating numbers and letters, as fast as you can.
Twenty-five circles are scattered across the board — the numbers 1 to 13 and the letters A to L. Tap them in a single alternating chain: 1, then A, then 2, then B, and so on, finishing on 13.
The next target is always shown above the board, and a blue trail is drawn behind you so you can see the path you have taken. Tapping the wrong circle flashes it red and adds two seconds to your final time; the circle you were supposed to hit stays waiting, so just carry on.
Your score is the time from the first tap to the last, plus any penalties. Lower is better, and a clean run almost always beats a fast but sloppy one.
The clock does not measure how fast your finger moves — it measures how long you spend looking. Most of a run is visual search, so the winning strategy is to search for the next two targets while your finger is still travelling to the current one. Once you have found where 7 is, your eyes should already be hunting for G.
The hardest part of the alternating rule is not remembering the sequence, it is suppressing the pull of the other one. When you have just tapped 5, the number 6 is sitting right there in your peripheral vision, and your hand wants it. Saying the chain out loud in your head — "five, E, six, F" — costs almost nothing and kills most wrong taps, which is worth far more than the raw speed it sacrifices.
Two seconds per error is a lot. At a typical pace of roughly one tap per second, a single mistake wipes out the gain from rushing the entire second half of the board. If you feel yourself guessing, slow down for one tap and confirm the label before committing.
Letters are the bottleneck for most people, because we scan a scattered field for digits far more often in daily life than for isolated capitals. A useful trick is to take one deliberate sweep of the board before your first tap, noting roughly where the far end of the alphabet sits — J, K and L are the ones you will otherwise waste time hunting for at the very end, when the clock has already been running longest.