Openings teach you openings. Endgames teach you chess!
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown536"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "Q2R4/8/8/8/1kp5/8/3pK3/r7 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... d1=Q+ 2. Rxd1 Rxa8 3. Rd7 Kb3 4. Rc7 c3 5. Kd3 Rd8+ 6. Ke2 c2 7. Rb7+ Ka2 8. Rc7 Kb1 9. Rb7+ Kc1 10. Rc7 Rb8 11. Kd3 Kd1 12. Rxc2 Rd8+ 13. Kc3 Rc8+ 14. Kb3 Rxc2 { Black wins with a large material advantage. } 0-1