Studying the Pawns (Advanced Pawns):
Part of the Chess Strategies Guide (Section 2)
As soon as a Pawn steps onto its 5th Rank, therefore into enemy territory, it's considered to be in an advanced position, hence the term "Advanced Pawn".
The Pawn will be an Advanced Pawn for the remainder of its time on the board, either until it gets captured, or it makes it to the 8th Rank (the enemy's Back Rank), where it will gain Promotion (e.g. to a Queen).
Remember that each side's 5th Rank is the fifth row of squares up from their Back Rank (where the Kings start each game). This wasn't necessary to explain back to the days of Descriptive Notation. However, most modern chessboards have the coordinates using the Algebraic system, so it may need pointing out that Black's 5th Rank begins at Rank 4, going down to Rank 1.
From this guide Studying the Pawns (Advanced Pawns)
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