Translated by Google as . . .
The Truchet Tiles and the Diamond Puzzle and
The Art of the Simple Truchet Tile.
About the author:
Raúl Ibáñez is a professor in the Department of Mathematics
at the UPV/EHU and collaborator with the Chair of Scientific Culture.
About his school:
The University of the Basque Country
(Basque: Euskal Herriko Unibertsitatea, EHU ;
Spanish: Universidad del País Vasco, UPV ; UPV/EHU)
is a Spanish public university of the Basque Autonomous Community.
— Wikipedia