Marta is sitting on the floor of his apartment when he comes home, with the notebook and a pencil. She looks up and smiles at him. He sits down beside her on the ragged rug, overcome for a moment to find himself here, with her, her fingers drawing the four lines, her hair so close to his eyes, her face relaxed and intent.

She draws her X in the center square of the board, and hands him the pencil. Should he mark the corner square, he asks himself, striving for a look of serious concentration, or the edge?
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