The GBR Code. - John Roycroft (J. Int. Comput. Games Assoc., 1984)

A Proposed Revision of the '50-Move Rule'. - John Roycroft (J. Int. Comput. Games Assoc., 1984)

Chess-Endgame Data-Base 'Oracles': Necessary and Desirable Features. - John Roycroft (J. Int. Comput. Games Assoc., 1985)

Personal Facts About the BB vs. N Experiment - and after. - John Roycroft (J. Int. Comput. Games Assoc., 1987)

Symmetrical Chess. - David L. Dowe; Ingo Althöfer; John Roycroft (J. Int. Comput. Games Assoc., 1990)

Identifying the Three Types of Zugzwang. - John Roycroft (J. Int. Comput. Games Assoc., 1990)

Kling-Horwitz Positions. - John Roycroft (J. Int. Comput. Games Assoc., 1992)