Chess Endgame: Queen + King vs Rook + King (Philidor)

This video illustrates the solution to one of the several key positions stemming from a Queen vs Rook endgame (Philidor), one of the most difficult endgames

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I'm currently practicing the king and queen vs. king and rook endgame and I need some help. How do I force Black into the Philidor position? : r/chessbeginners

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