Alexandre Deschapelles (French pronunciation: [alɛksɑ̃dʁ deʃapɛl]; March 7, 1780 in Ville-d'Avray near Versailles – October 27, 1847 in Paris) was a French chess player who, between the death of François-André Danican Philidor and the rise of Louis-Charles Mahé de La Bourdonnais, was probably the strongest player in the world.

Louis Gatien served as an officer in a dragoon regiment and later, through the influence of his close friend, the future admiral Louis-René Levassor de Latouche Tréville, became an officer in the royal household (Maison du Roi) with a number of rooms near the king's chambers in the château of Versailles.

He also received a massive sabre wound down the entire length of his face, which caused the phrenology enthusiasts of his era to suggest "cranial sabre-wounds" were responsible for his amazing chess skill.

[3] He was the teacher of Jacques François Mouret[4] and later, c. 1820, he accepted Louis-Charles Mahé de La Bourdonnais as a student.

"[5] Given to his grandfather Louis Cézaire Le Breton des Chapelles in 1760 by the French juge d'armes: "A silver shield with three green palms posed two and one.