Breyer died at the age of 28 to a heart attack.
He has a dozen chess variants to his name, of which the Breyersysteem Spanish in the chess opening known as the most played is. This is as follows: 1. e4 e5 2. Pf3 Nc6 3. Lb5 a6 4. La4 Pf6 5.0-0 Le7 6. Te1 b5 Lb3 0-7.0 8. c3 d6 9. h3 Pb8 10. d4 (diagram)