Why the extra rank on each side in 4 player chess? - Chess Stack Exchange

Why do we have an extra rank (marked with the red lines) on each side in 4 player chess? What could be the possible logic? (screenshot is taken from chess.com)

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Why the extra rank on each side in 4 player chess? - Chess Stack Exchange

4 Player Chess - Chess Terms

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Onietoiy 3 in 1 High Polymer 3.75 Inch Weighted Chess Sets Backgammon and Checker Games Standard Competition Chess Pieces with Extra 2 Queens and

analysis - Moving a pawn to attack a piece on the 5th or 4th rank - Chess Stack Exchange

World Chess Championship 2023 Round 4 As It Happened: Ding Liren beats Ian Nepomniachtchi to level score at 2-2

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