Colle system or London system


The London System, because it is more flexible (in my opinion) and the dark-squared bishop is more active.
London material that is possibly of interest:
https://web.archive.org/web/20140627074459/http://www.chesscafe.com/text/hansen85.pdf
http://www.gambitbooks.com/pdfs/Win_with_the_London_System.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/9035.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/7619.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/7767.pdf
https://web.archive.org/web/20140627100246/http://www.chesscafe.com/text/hansen139.pdf
https://web.archive.org/web/20140708093403/http://www.chesscafe.com/text/tips.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/7656.pdf
https://www.chess.com/article/view/the-perfect-opening-for-the-lazy-student
and there is also the book, First Steps: The Colle and London System.
https://www.chess.com/article/view/how-to-understand-openings
A set of London System DVDs by GM Damien Lemos.
A GM Simon Williams DVD on the same subject.
A set of London System DVDs by GM Henley
Possibly helpful:
Starting Out: The Colle by Richard Palliser (2007)
https://web.archive.org/web/20140627040050/http://www.chesscafe.com/text/hansen103.pdf
The Colle: Move by Move by Cyrus Lakdawala (2013)
https://web.archive.org/web/20140627110453/http://www.chesscafe.com/text/hansen169.pdf
First Steps: Colle and London Systems by Cyrus Lakdawala (2016)
https://www.chess.com/article/view/how-to-understand-openings
A set of Colle System DVDs by IM Andrew Martin.
Starting Out: d-Pawn Attacks by Richard Palliser (2008)
https://web.archive.org/web/20140626165651/http://www.chesscafe.com/text/hansen118.pdf
Zuke 'Em, The Colle-Zukertort Revolutionized by David Rudel (2009)
https://web.archive.org/web/20140627053117/http://www.chesscafe.com/text/hansen130.pdf
The Zukertort System: A Guide for White and Black by Grigory Bogdanovich (2010)
https://web.archive.org/web/20140627131000/http://www.chesscafe.com/text/hansen143.pdf
A Killer Chess Opening Repertoire by Aaron Summerscale & Sverre Johnsen (2010)
https://web.archive.org/web/20140627030157/http://www.chesscafe.com/text/hansen133.pdf
The Moment of Zuke by Dave Rudel (2009)
https://web.archive.org/web/20140627030157/http://www.chesscafe.com/text/hansen133.pdf


Neither is good in "all" cases.
London system is bad against the Modern Defense
Colle System is bad against Fianchetto Defenses (KID, Grunfeld, etc) and only works if Black has played ...e6 with the Bishop behind it, not out in front of the pawn, then you need to play c4.
Colle Zukertort doesn't work if Black hasn't played ...d5 and ...e6
I'll give you a prime example. In my own case when I'm White, I start 1.d4 and then:
Against 1...Nf6/2...g6, I will play the Barry Attack (1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4) or the 150-Attack (1.d4 Nf6 2.Nf3 g6 3.Nc3 d6 4.e4 intending 5.Be3)
Against 1...d5 with an early ...e6 (Bishop behind pawn), Colle System (typically Zukertort)
Against 1...Nf6/2...e6, will start out as a Colle, but if no ...d5, will transpose to a Classical QID (QID w/ 4.e3 by Transposition)
Against 1...d5 but the Bishop comes out to f5 or g4 (Anti-Colle), then an early c4 and Qb3 to attack b7. Often transposes to the Slow Slav.
So if you think pigeon-holing yourself to the Colle or London as a "catch-all" system is going to make you better, think again!