Betza was a user of the website
The Chess Variant Pages, on which several chess related works of his can be found. These include the rules of his chess variants, his article on his
funny notation, and articles about the value of
fairy chess pieces.
Invented chess variants
Multiplayer Chess (date unknown)
High-Low Chess (1968)
Strange Relay Chess (1970s)
Coordinate Chess (or Co-Chess) (1973)
Conversion Chess (1973)
Co-Relay Chess (1973)
Double Conversion Chess (1973)
Heterocoalescence Chess (1973) by
Philip Cohen, based on an idea by Betza