If your opponent offers you a draw, try to work out why he thinks he's worse off.
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[Event "rated untimed match"] [Site "?"] [Date "1957.??.??"] [Round "?"] [White "Anon"] [Black "Richter"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "3rRr1k/pp4pp/2p1Q3/8/P7/2P5/1P3qPP/4R2K b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Rdxe8 2. Qxe8 h6 3. h3 ( { White can try: } 3. Qe2 Qxe2 4. Rxe2 Rf1# ) 3... Rxe8 { Black wins with a large material advantage. } 4. Rxe8+ { Black wins with a large material advantage. } 0-1