The Queen's Gambit Accepted Trap
Holding the pawn with ...b5 leaves the a8 rook exposed on the long diagonal.
Opening: Queen's Gambit Accepted. Set by White. Level: Intermediate.
Practise setting and escaping itThe moves
1.d4 d5 2.c4 dxc4 3.e3 b5 4.a4 c6 5.axb5 cxb5 6.Qf3
It only works after a mistake
Black must play cxb5 for it to work. White's moves are good moves; the trap only punishes Black's greed.
How to avoid it
Don't try to keep the c4 pawn; develop with Nf6 and e6.