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Ragozin Defense: Vienna Variation Theory

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1. 7.Bxc4
2. 7.e5...cxd4 8.Qa4+
3. 7.e5...cxd4 8.Nxd4

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Nimzo-Indian Defense: St. Petersburg Variation Theory

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1. Chapter 1

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Nimzo-Indian Defense Classical Variation (Main Line) Theory

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1. Chapter 1

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Sicilian Defense: Kan Variation Theory

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1. Chapter 1

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Ragozin Defense Theory

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1. 5.Bg5
2. 5.Qa4+...Ng6 6.e3
3. 5.Qa4+...Ng6 6.Bg5
4. 5.Qb3

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French Defense Theory

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1. French Defense: Advanced Variation

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Game study

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1. Asatin - Josefan

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