Openings teach you openings. Endgames teach you chess!
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[Event "rated untimed match"] [Site "Petersburg"] [Date "1902.??.??"] [Round "?"] [White "Alapin"] [Black "Schiffers"] [Result "1-0"] [BlackElo "0"] [FEN "1r4k1/p4p2/2pq1pp1/2bp4/8/1P1Q1PN1/P1P3PP/5R1K b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Qxg3 2. hxg3 Kg7 3. b4 Rh8# 1-0