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The double fianchetto: …h6 before e4

1.c4 c6 2.g3 d5 3.Nf3 Nf6 4.Bg2 Bf5 5.O-O e6 6.b3 Nbd7: 20 games, 28%. No Qb3 here: White prepares e4, slowly.

Reminder: after 7.Be3 Qxb3 8.axb3, which pawn move makes a7 poisoned?