Passed pawns must be pushed.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "White player"] [Black "Black player"] [Result "*"] [BlackElo "0"] [FEN "8/p6p/3k4/2p5/2P3P1/2P5/P7/4K3 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] { Outside Passer.|The king and pawn endgame lesson demonstrates how to defeat an opponent with an over extended pawn. The winning technique make good use of an outside passer. } 1... Ke5 { Black intends to capture white's overextended g-pawn and win using the h-pawn as an outside passer. } 2. Kf2 { White moves in an attempt to defend his kingside. } 2... Kf4 3. g5 { White pushes black's king back as far as possible. } 3... Kxg5 4. Kg3 { White seizes the opposition, but that will do little to change the outcome of the game. } 4... Kf5 5. Kf3 { White attempts to keep the black king from invading. } 5... a5 6. a3 a4 7. Ke3 h5 { Suddenly, the h-pawn comes alive and threatens to promote. } 8. Kf3 { White races to stop the outside passer. Black will use the outside passer to keep white's king occupied and out of the way, while black invades to capture white's c- and a-pawns. } 8... h4 9. Ke3 { White tries to defend his vulnerable pawns. } 9... h3 10. Kf3 h2 11. Kg2 { White must stop the outside passer from promoting. } 11... Ke4 { Black takes the opportunity to invade decisively. } 12. Kxh2 { The outside passer is sacrificed so that others can promote. } 12... Kd3 13. Kg1 { The white king can do nothing to stop the slaughter. } 13... Kxc4 14. Kf2 Kxc3 15. Ke2 c4 16. Kd1 Kb2 { The c-pawn will promote soon. Black wins. } *