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- 4...dxc6 5.O-O Qd6 — Exchange, 5...Qd6 (not 6.Na3, 6.d3), C60-C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C68 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 - Ruy Lopez: Exchange Variation, SÉRIE C
Petropolis Interzonal 1973 – Round 6 – Biyiasas, Peter – 1/2-1/2 – Keres, Paul Petrovich – G24
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