The table

In the talk you had with him, Luis told you that his other great passion, apart from mathematics, is astronomy. In front of you, hanging from the wall, the picture that proves it. A large map of constellations, with an image of Ptolemy’s wife on the left.

On the table, a checkers’ board. Some of the pieces are still on the board. Others next to it. The game was half-kept, it could not be finished. Juan Fernández Costoya told you that he had been playing with Luis after lunch. The last game was interrupted when Luis received a message on his mobile. At that moment, he moved the remaining pieces on the board and asked him to leave. He needed to be alone to go over some issues.