Pick anything and be asked it cold, whether or not you owe it. Nothing here is unlocked by anything else.
Chapter 1
1.e4 c5 2.c3 Nf6
61 decisions · 13 rounds of 5
Chapter 2
1.e4 c5 2.c3 d5
119 decisions · 24 rounds of 5
Black plays 3...Qxd5
116 decisions · 24 rounds of 5
Black plays 3...Nf6
2 decisions · 1 round of 5
Chapter 3
1.e4 c5 2.c3 e6
127 decisions · 26 rounds of 5
Black plays 3...d5
113 decisions · 23 rounds of 5
Black plays 3...cxd4
12 decisions · 3 rounds of 5
1 decision · 1 round of 5
Chapter 4
1.e4 c5 2.c3 d6
27 decisions · 6 rounds of 5
15 decisions · 3 rounds of 5
10 decisions · 2 rounds of 5
Black plays 3...Nd7
Chapter 5
1.e4 c5 2.c3 g6
22 decisions · 5 rounds of 5
20 decisions · 4 rounds of 5
Black plays 3...Bg7