Possessed of genius, or the faculty of invention; skillful or promp to invent; having an aptitude to contrive, or to form new combinations; as, an ingenious author, mechanic.

Proceeding from, pertaining to, or characterized by, genius or ingenuity; of curious design, structure, or mechanism; as, an ingenious model, or machine; an ingenious scheme, contrivance, etc.

Witty; shrewd; adroit; keen; sagacious; as, an ingenious reply.

Ingenious is an abstract strategy board game designed by Reiner Knizia and published in 2004 by Kosmos under its German title Einfach Genial. It is also published by Mensa under the title Mensa Connections. Ingenious won the 2004 Schweizer Spielepreis and placed 5th in the Deutscher Spiele Preis.

Implementation of Ingenious boardgame

motivated

Mental; intellectual.

X's proof is ingenious: I understand it.