Chess Variants/Double Chess - Wikibooks, open books for an open world

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In this book, prolific chess author Cyrus Lakdawala recommends a repertoire for White players who like to open 1 e4. The repertoire is based around

Opening Repertoire 1 e4 (Everyman Chess)

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The Encyclopedia of Chess Variants

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PDF) A METHOD FOR COMPARING CHESS OPENINGS 1

I made an open-source cheat sheet for most common openings to

Why can diagonal mirroring your opponent's moves in chess be a

List of chess variants - Wikipedia

Encyclopaedia of Chess Openings BII