(A36) Ultra-Symmetrical
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
(A36) Ultra-Symmetrical (Botvinnik)
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4
(A36) Ultra-Symmetrical (Reversed Botvinnik)
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5