Possibly of interest:
The Kaufman Repertoire for Black & White by GM Larry Kaufman (2012),
https://web.archive.org/web/20140626221508/http://www.chesscafe.com/text/hansen162.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/955.pdf
First Steps: The Colle and London System
https://www.chess.com/article/view/how-to-understand-openings
Hello Everyone. I want to develop a 1.d4 repertoire as white. Can someone tell me what to learn?