Recently, various fields of science and technology have begun to introduce technical standards for terms and definitions.
This is due to necessity: ambiguous interpretations of objects and phenomena are sometimes expensive. And in the theory of chess tactics, many things also need to be clarified and formulated more clearly.
This will benefit all chess enthusiasts who want to improve.

Everyone agrees that a combination is the highest expression of beauty in chess.
Tartakovsky once described it as "...the possibility of the impossible. It is a divine spark that... illuminates a chess game like a meteor."
"We call chess an art," wrote O. Kotov, "primarily because it has the beauty of combinations that brings aesthetic pleasure to every true chess lover.