masterstroke

[ mas-ter-strohk, mah-ster- ]

/ ˈmæs tərˌstroʊk, ˈmɑ stər- /

a masterly action or achievement; an extremely skillful or effective action: War was avoided by a masterstroke of diplomacy.

Origin of masterstroke

First recorded in 1670–80; master + stroke¹

But I conclude it with one master-stroke of eulogy—He was the opposite of these men.

It Is Never Too Late to Mend |Charles Reade
But if he intended the speech to be hailed as a master-stroke of wit, he signally failed, for nobody laughed.

The Tenant of Wildfell Hall |Anne Bronte
The building of Alexandria must be held the master-stroke of policy by which Egypt was kept in obedience.

History Of Egypt From 330 B.C. To The Present Time, Volume 10 (of 12) |S. Rappoport
This last phrase, accompanied by a significant sigh, was a master-stroke.

The Physiology of Marriage, Complete |Honore de Balzac

The use of the Latin in the services and administration of the Roman Church is a master-stroke of political genius.

Constantinople painted by Warwick Goble |Alexander Van Millingen

masterstroke

/ (ˈmɑːstəˌstrəʊk) /

an outstanding piece of strategy, skill, talent, etc your idea is a masterstroke