Help? Error in Modern Chess Openings (15th ed.) p.403 - Chess Forums - Chess .com

Hi there, I'm wondering if anyone can help me make sense of this page. Specifically, the issue is with the white moves (4.Bg5, 5.Bg5). My first instinct was that perhaps it should have been 5.e3 (as in the orthodox defence), but line 25 has 8.e3. I then thought that perhaps black plays 4h6 (in response

Queen's Gambit Declined: Albin, Modern Line - Chess Openings

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Help? Error in Modern Chess Openings (15th ed.) p.403 - Chess Forums - Chess .com

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ELI5/model_code/dict.multitask_source_bpe.txt at main · facebookresearch/ELI5 · GitHub

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Openings Section Not Updating For Stats Page. - Chess Forums

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Lichess 404, lasted only a second and preserved my active game + gave me something cool to look at. : r/chess