A retired professor is sitting at a table in an outdoor bar on a nice sunny day. The waitress brings him breakfast. Immediately afterwards a boy arrives, and the professor invites him to sit down, waiting for him. The boy has dark skin, he comes from Mali. He is well dressed, serene, he too ready for the "game" that the professor must lead. This is a puzzle race, where you win by completing a crossword puzzle in full. But there is a variant that makes the test impossible: to guess the solutions before the question is asked. And yet the boy comes to an end. Almost…
