|Moves: 1. d4 d5 2. e4 c5|
After 3. dxc5 dxe4 (Nf6 seems better), Qxd8+ is possible. Black has lost the right to castle, but White's pawn on c5 is weaker that Black's e4-pawn. White is better.
After 3. exd5, Qxd5 (or Nf6) is possible, since 4. Nc3 runs into Qxd4.
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