On the path integral of the relativistic electron

We revisit the path integral description of motion of a relativistic electr on. Applying a minor, but well-motivated conceptional change to Feynman's c hessboard model, we obtain exact solutions of the Dirac equation. The calcu lation is performed by means of a particularly simple method different from both the cumbinatorial approach envisaged by Feynman and its Ising model c orrespondence.