[Event "Joita MT"] [Site "?"] [Date "2018.??.??"] [Round "?"] [White "(4) Árpád Rusz (ROU)"] [Black "?"] [Result "1-0"] [Annotator "1st Honourable Mention"] [SetUp "1"] [FEN "7n/p1p2p2/2B2R1p/P6P/P5b1/6Pp/2K2P1P/k2r4 w - - 0 1"] [PlyCount "15"] {The a4 pawn prevents white's main plan (1.Rf4 followed by 2.Ra4#). In order to win, white will try to reach the same position but without the a4 pawn. But how does this magic trick of "disappearing pawn" work?} 1. Bf3 $1 ({Logical try:} 1. Rf4 $2 Rd6 $1 $19) (1. f3 $2 Rf1 $1 $11) 1... Rd4 (1... Bxf3 2. Rxf3 { Saavedra's double attack (echo)} Rh1 3. Ra3#) (1... Rd6 2. Rxd6 Bf5+ 3. Rd3 $1 $18) 2. Kc3 $1 ({Due to the white king's poor position, the exchange doesn't work:} 2. Bxg4 $2 Rxg4 3. Rxh6 Rg8 4. Rc6 Rb8 $1 5. Rxc7 Rb2+ 6. Kc3 Rxf2 7. Rxa7 Rxh2 $11) 2... Rxa4 3. Kb3 Bd7 $1 ({The rook cannot return to its previous place:} 3... Rd4 {Now the exchange does work because the white king has an improved position.} 4. Bxg4 $1 Rxg4 5. Rc6 $1 Kb1 6. Rxc7 a6 7. Rc6 $1 ( 7. Rc8 $2 Rg5 8. Rxh8 Rxh5 $11) 7... Rg8 $1 8. Rxa6 (8. Rxh6 $2 Kc1 $11) 8... Kc1 9. Rd6 $1 f5 (9... f6 10. Rd7 $1 $18) 10. Rxh6 (10. Rd7 $2 Rf8 11. a6 Nf7 12. f4 Ra8 13. a7 Nd8 $11 {mutual zugzwang}) 10... Kd2 11. Re6 $1 Nf7 12. f4 Rxg3+ $1 13. Kb4 $1 $18) 4. Bc6 $1 Rd4 (4... Bxc6 5. Rxc6 {Saavedra's double attack (echo)} Rxa5 6. Rc1#) 5. Kc3 $1 ({White cannot exchange yet:} 5. Bxd7 $2 Rxd7 6. Rxh6 Rd8 $11) 5... Rd1 6. Kc2 Bg4 {Now we are back to the initial position but the a4 pawn has disappeared! The magic trick worked! White can carry out its main plan:} ({The rook move is again irreversible, the exchange wins due to the better position of the white king:} 6... Rd4 7. Bxd7 Rxd7 8. Rf4 $1 $18) 7. Rf4 $1 Rd6 8. Ra4# 1-0