Unorthodox Chess Openings - Eric Schiller

The Modernized Philidor Defense - Thinkers Publishing

Learning Openings, midgame, and endgame - Chess Forums

Playing Chess Chess Openings opening - Exeter Chess Club

Modern Chess Openings.pdf

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FCO Fundamental Chess Openings, PDF, Chess Openings

Convekta Modern Chess Openings Nc6.pdf - Jovan Petronic

Standard chess openings : the complete and definitive standard to all the major chess openings, more than 3,000 opening strategies inside! : Schiller, Eric : Free Download, Borrow, and Streaming : Internet Archive

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Mastering the Chess Openings by John Watson