1.e4 e5 2.f4 Nc6 3.Nf3 d6 4.Bc4 Bg4: 5.O-O?! (48% of 1.5M games)

The most played move is an inaccuracy

9 moves

1.e4 e5 2.f4 Nc6 3.Nf3 d6 4.Bc4 Bg4. In 1,529,269 Lichess games between 1600 and 2200, the most played move is 5.O-O (48%). At 20 million nodes it is an inaccuracy: -0.62 against +0.25 for h3, 6 win-chance points, confirmed by a second search (-0.37 against +0.25). Masters databa…

The club move: 48% of games. inaccuracy, 6 win-chance points against h3. -0.62 at 20M nodes.