• Ruy Lopez exchange variation (C68)

    e4 e5 Nf3 Nc6 Bb5 a6 Bc6

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    Ruy Lopez exchange variation, 5.O-O (C69) dc o-o dc Nc3 Ruy Lopez exchange, Keres variation (C68)
    Ruy Lopez exchange, Alekhine variation (C68) dc d4 ed Qd4 Qd4 Nd4 Bd7 dc d4 ed Qd4 Qd4 Nd4 Bd7 Ruy Lopez exchange, Alekhine variation (C68)
    Ruy Lopez exchange, Keres variation (C68) dc Nc3 dc o-o Ruy Lopez exchange variation, 5.O-O (C69)