Pick anything and be asked it cold, whether or not you owe it. Nothing here is unlocked by anything else.
Chapter 1
1.e4 e5 2.Nc3 Nf6
67 decisions · 14 rounds of 5
Black plays 3...Nc6
32 decisions · 7 rounds of 5
Black plays 3...Nxe4
13 decisions · 3 rounds of 5
Black plays 3...Bc5
33 decisions · 7 rounds of 5
Black plays 3...Bb4
4 decisions · 1 round of 5
Black plays 3...c6
2 decisions · 1 round of 5
Chapter 2
1.e4 e5 2.Nc3 Nc6
1 decision · 1 round of 5