A good way not to exchange in the English S J Hutchings vs Keene, 1973   (A16) English, 22 moves, 0-1 Weakness of 4...Bc5 Botvinnik vs Keres, 1966  (A29) English, Four Knights, Kingside Fianchetto, 27 moves, 1-0 Excellent reply to 4...Bb4 Petrosian vs H Ree, 1971  (A29) English, Four Knights, Kingside Fianchetto, 8 moves, 1-0