brilliancy

Noun

brilliancy (countable and uncountable, plural brilliancies)

1. A shining quality; brilliance.
   • The beauty and brilliancy of this insect are indescribable, and none but a naturalist can understand the intense excitement I experienced when I at length captured it.1869, Alfred Russel Wallace, The Malay Archipelago, volume II, London: Macmillan and Co., page 51
   • […] to assist greatly in the consumption of the lamp, and to diminish the aqueous precipitations produced on the interior of the lantern glass, which has the effect of reducing more or less the brilliancy of the light.1871, Léonce Reynaud, Memoir Upon the Light-house Illumination of the Coasts of France, page 110
2. An act of being brilliant.
   • His brilliancy lay in combining old concepts from far-flung fields into a new idea.
   • Surely it must have been his brilliancy that accounted for Vardon standing out as a stroke or two better than such a model of steadiness as J. H. Taylor[.]1922, W. K., “Has the Standard of Professional Golf Improved?”, in Baily's Magazine of Sports and Pastimes, page 125
3. A spectacular and beautiful game of chess, generally featuring sacrificial attacks and unexpected moves.
   • Bobby Fischer, one of the greatest chess players who ever lived, died at the age of sixty-four from kidney failure. He had lived one year for each square on a chessboard. / THE GOOD / First of all, you should learn the term “brilliancy.” It refers to a game that is played with spectacular strategy...2015, Michael Hearst, Extraordinary People: A Semi-Comprehensive Guide to Some of the World's Most Fascinating Individuals, Chronicle Books, →ISBN, page 38