How to beat Rule 16 of The Password Game: What is Algebraic Chess notation?

Chess Notation - The Language of the Game

Summation notation

Tell me your answer & follow for more puzzles! 👀♟️ . . To learn chess notation, understand that each square on the chessboard is identified by a unique letter-number combination, where the letters represent the columns (files) from "a" to "h" and the numbers represent the rows (ranks) from "1" to "8"; to record a move, write the piece abbreviation (like "N" for knight, "Q" for queen, "K" for king, "R" for rook, "B" for bishop) followed by the square it moves to, with no piece abbreviation neede