Dynamism

Etymonline dates dynamism to 1831 in English in the sense of dynamic energy, force, drive, formed from the Greek dynamis meaning power, might or strength plus the suffix -ism, and notes that the adjective dynamic appears by 1812 from the French dynamique, coined by Leibniz in 1691, from Greek dynamikos meaning powerful. The chess sense is a twentieth-century application with no documented coinage. Wikipedia's chess glossary defines dynamism as a style of play in which the activity of the pieces is favored over more positional considerations, even to the point of accepting permanent structural or spatial weaknesses, and states that dynamism stemmed from the teachings of the Hypermodern school and challenged the dogma found in more classical teachings such as those of Wilhelm Steinitz and Siegbert Tarrasch. It is often loosely associated with the Soviet school, but Wikipedia's article on the Soviet chess school does not use the term dynamism at all, describing instead an asserted national style and a fast-paced, daring approach exemplified by postwar players like David Bronstein. No first chess citation or coiner was found.

First documented: n.a. for the chess sense; the English word dates from 1831 per Etymonline — n.a. for the chess sense