Power openings: Grünfeld Defence Volume 1 and 2, Markus Ragger (English)
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Semi-Closed Games - Moves (param) - unsupported:1.d4 Nf6 2.c4 g6 3.Nc3 (3.g3 c6 (3...Bg7 4.Bg2) 4.Bg2 d5) 3...d5
Power openings: Grünfeld Defence Volume 2 - Systems without cxd5, Markus Ragger (English)
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$ 29.90
Power openings: Grünfeld Defence Volume 1 - Systems with cxd5, Markus Ragger (English)
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The Grünfeld Formula, Andrew Martin (English)
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$ 29.90
Tactic Toolbox Grünfeld, Michal Krasenkow (English)
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3.h4 against the King's Indian and Grünfeld, Sipke Ernst (English)
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Simple and modern anti-grünfeld variation 5.Bd2, Adrian Mikhalchishin (English)
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$ 9.90