Colle system: Zukertort variation, 5 b3: a White Opening you Can Use for the Rest of your Career

There are two faces to what we call the Colle System �� but many authorities recognize only one. Weighty tomes like The Encyclopedia of Chess and The Oxford Companion to Chess, and even the Russian Chess �� Encyclopedic Dictionary, define the Colle as an opening in which White puts pawns at d4, e3, and c3.

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