Its a fairly arbitrary differentiation, and not very meaningful. We all have to create a positional structure from which to attack, in a so called tactical manner. Perhaps we are simply talking about long term tactics and short term tactics.
Difference between positional and tactical chess
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That is why you bring a boat cushion with you for those situations. You can then focus harder than the other players in a tournament.
Not a bad idea! I have tried various ethanol-based central nervous system depressants, with mixed results. A cushion might be a better alternative