Speed Decode
Race the clock: use the key at the top to turn each symbol into its digit as fast as you can.
Timed coding sprint
A full page of marks is shown at once — just like the classic paper SDMT. The key stays pinned at the top. Work left-to-right: answer the highlighted mark to advance to the next. Go as fast as you can without slipping.
Length
Example key · shuffled fresh each round
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