Chess Board
[ECO code D40]
QUEEN'S GAMBIT - Semi-Tarrasch Def.
The Primitive Pillsbury
Black's QBP on QB4(c5) removed White's QP on Q5(d4) and attacked his QKt, inviting an exchange.
White exchanges but develops his Queen to take Black's doubled QP on Q4(d4). Pillsbury's original line, now superceded as 6..B-K2 equalises. W-Alt.
    White  Black	White  Black
 1. P-Q4   P-Q4	     5.	B-Kt5  BPxP
 2. P-QB4  P-K3      6.	QxP
 3. Kt-QB3 Kt-KB3
 4. Kt-B3  P-B4
Example ends: Undo or Jump or Clear