Bird Opening

213 puzzles

f4

113 puzzles for White · avg difficulty 1.6

100 puzzles for Black · avg difficulty 1.5

Mistake	Side	Count	Avg loss
5...Nxf7	Black	13	5.0 pawns
5.Bg4	White	10	106.6 pawns
5.Nc6	White	5	4.4 pawns
6.Nc6	White	5	2.1 pawns
5.e5	White	5	3.3 pawns