The blunders are all there on the board, waiting to be made.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown29"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[ECO "A40"]
[FEN "r3k2r/pp1b1p2/2p1pn1p/q2pB1p1/1bP5/1PNP4/P1Q1PPPP/R3KB1R b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... d4 2. Bxd4 ( { White can try: } 2. Bxf6 Bxc3+ 3. Kd1 Rg8 4. Rb1 Rg6 5. Bxd4 Bxd4 { Black wins with a large material advantage. } ) 2... e5 3. Be3 ( { White
can try: } 3. Bxe5 Qxe5 { Black wins with a large material advantage. } 4. Rc1 { Black wins with a large material advantage. } ) 3... Bxc3+ 4. Bd2 Bxd2+ 5. Qxd2 Qxd2+ 6. Kxd2 { Black wins with a large material advantage. } 1-0