That was a clever (chess) move, "checkmate", or "treat someone like a chess piece". Strategic board game for two people with 16 pieces each in light and dark color. Symbol of intelligence and power, but also the fight between good and evil.
The chess pawn emoji was introduced in 2018 and released as part of the Unicode 11.0 standard. This emoji can be found under the activities
category. Because the chess pawn emoji has not been around for very long, it might not display correctly in some operating systems.