6 Qb3 Bxf3 7 Gxf3 A Foguelman vs Bronstein, 1964  (D25) Queen's Gambit Accepted, 21 moves, 0-1 5 h3 Bh5 6 Bxc4 e6 7 Qb3 Bxf3 E Fatalibekova vs N Gaprindashvili, 1964  (D25) Queen's Gambit Accepted, 22 moves, 0-1 7 dxc5 Qxd1+ J H Donner vs Spassky, 1970 (D26) Queen's Gambit Accepted, 38 moves, 0-1 3 games