[Event "?"] [Site "Amsterdam"] [Date "????.??.??"] [Round "?"] [White "Lucena Position"] [Black "?"] [Result "*"] [Annotator "peter"] [SetUp "1"] [FEN "2K5/2P1k3/8/8/8/8/1r6/3R4 w - - 0 1"] [PlyCount "13"] [EventDate "1889.08.??"] [EventType "tourn"] [EventRounds "9"] [EventCountry "NED"] [SourceVersionDate "2020.02.22"] {} 1. Re1+ {Black has the white king hemmed in. So white must make space and avoid his king being checked forever.} Kf7 (1... Kd6 2. Kd8 {and the pawn queens}) (1... Kf6 2. Re4 Kf5 3. Rd4 Ke5 4. Rd1 {now black's king is too far away so the white king escapes} Ke6 5. Kd8) 2. Re4 {The key preparatory move} ( {Let's see what happens if white tries to move his king out of the way and promote the pawn immediately. Black just starts checking him.} 2. Kd7 Rd2+ 3. Kc6 Rc2+ 4. Kb7 (4. Kb6 Rb2+ 5. Ka5 Rc2 6. Kb6 Rb2+) 4... Rb2+ 5. Ka8 Rc2 6. Kb7 Rb2+ {and white is not getting anywhere} 7. Kc8 Rb3) 2... Kf6 3. Kd7 Rd2+ ( 3... Kf5 4. Rc4 Rd2+ (4... Rb7 5. Kd8) 5. Kc6) 4. Kc6 Rc2+ 5. Kd6 Rd2+ 6. Kc5 Rc2+ 7. Rc4 {revealing the point of 2.Re4. Now the pawn will queen.} *