Semi-Slav Defense: Noteboom Variation
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Queen's Gambit Declined: Semi-Slav, Abrahams Variation
5. a4 Bb4 6. e3 b5 7. Bd2 a5
Queen's Gambit Declined: Semi-Slav, Koomen Variation
5. e3 b5 6. a4 Bb4 7. Bd2 Qe7
Semi-Slav Defense: Noteboom Variation, Abrahams Variation
5. a4 Bb4 6. e3 Bxc3+ 7. bxc3 b5 8. axb5 cxb5