three move theory

top ten most common first three moves.

#1

1.e4, c5 2.Nf3, d6 3.d4, cxd4 (Sicilian defense, open variation, main line)

#2

1.d4, Nf6 2.c4, e6 3.Nc3, Bb4 (Nimzo-Indian defense)

#3

1.d4, d5 2.c4, e6 3.Nc3, Nf6 (Queens gambit declined main line)

#4

1.d4, d5 2.c4, c6 3.e3, Nf6 (Queens gambit decline, slavic defense)

#5

1.e4, e5 2.Nf3, Nc6 3.Bb5, a6 (Ruy Lopez/ Spanish opening)

#6

1.e4, e5 2.Nf3, Nc6 3.Bc4, Nf6 (Two knights defense)

#7

1.e4, e5 2.Nf3, Nc6 3.Bc4, Bc5 (Italian opening)

#8

1.e4, e6 2.d4, d5 3.Nc3, Bb4 (French Defense Winawer variation)

#9

1.e4, c5 2.Nf3, Nc6 3.d4, cxd4 (Sicilian Defense Franco-Sicilian variation)

#10

1.d4, Nf6 2.Bg5, Ne4 3.Bf4, c5 (Trompowsky opening classical variation)

Most common among what group of players?  Whence cometh your data, please?

from my chessbase database of grandmaster games

whence?

?