Article : Dominos sur grilles trouées - Colegiul National B.P. Hasdeu (Buzau, Roumanie)

In this paper the author studies the possibilities of paving with dominos a square grid where an arbitrary number of obstacles are placed, that is from which an arbitrary number of cells have been removed. Different approaches are considered: direct study for a grid with a pair of obstacles, examples with more obstacles, approach by graph theory and then by linear algebra.