Event: Game with swapped variations.
1.e4
1...e5
 |
 +- 1...c5
 |
 +- 1...g6 Used to be at index 4
 |
 +- 1...d5
 |
 +- 1...f5
 |
 +- 1...c6 Used to be at index 1
 |
 +- 1...b5
 |
 +- 1...a5
 |
2.Nf3
*