Gregory Simon Koshnitsky vs Joao Mario Ribeiro Tel Aviv ol (Men) fin-D Tel Aviv ISR round 4 1964.11.18 King’s Indian Attack 1/2-1/2

Wolfgang Leonhardt vs Gregory Simon Koshnitsky
27th Australian ch Melbourne AUS round 8 1957.01.04
Grünfeld Defense: Counterthrust Variation 0-1

Gregory Simon Koshnitsky vs Olle Smith
Australia v Sweden corr match Bucharest ROU 1953.??.??
Grünfeld Defense: Exchange Variation, Classical Variation 1/2-1/2

Gregory Simon Koshnitsky vs Karlis Ozols
27th Australian ch Melbourne AUS round 13 1957.01.11
Dutch Defense: Blackburne Variation 1/2-1/2

Cecil John Seddon Purdy vs Gregory Simon Koshnitsky
Sydney m round 2 1932.11.17
English Opening: Agincourt Defense 0-1