C20 Open game
1.e4 e5
1. e4
W moves the king pawn forward to occupy the center.
1. ... e5
B mirrors the W move, and occupies its own share of the center.
Lines of play
1-0: 17% | [1.e4 e5] 2.c4 Nf6
1-0: 33% | [1.e4 e5] 2.a3 Nf6
1-0: 38% | [1.e4 e5] 2.c4 Nc6
1-0: 38% | [1.e4 e5] 2.Ne2 Nf6
1-0: 64% | [1.e4 e5] 2.c3
1-0: 64% | [1.e4 e5] 2.d3 Nf6 3.f4
