[Event "Boris Oleynik MT"] [Site "?"] [Date "2017.??.??"] [Round "?"] [White "Rusz, Arpad"] [Black "(Study 113)"] [Result "1-0"] [Annotator "2nd Prize"] [SetUp "1"] [FEN "8/8/7N/8/2p5/k1P2p2/p6P/K7 w - - 0 1"] [PlyCount "25"] [GameId "2245678872453876"] [EventDate "2017.??.??"] 1. Nf5 $1 (1. Ng4 $2 Kb3 $11) 1... f2 (1... Kb3 2. Nd4+ $18) 2. Ng3 $1 ({1st thematic try:} 2. Ne3 $2 {2nd Prize} Kb3 3. h4 Kxc3 4. Nd1+ {Position X'} Kd2 $1 {Better than 3...Kd3? which leads to a check.} 5. Nxf2 {No check!} c3 $1 6. Ne4+ Ke3 $1 7. Nxc3 Kf4 $11) 2... Kb3 3. h4 Kxc3 4. Ne4+ {Position X} Kd3 {Unlike in the 1st thematic try, the black king had no access to the d2 square so moving to d3 is the only option.} 5. Nxf2+ {Check!} Ke2 (5... Ke3 6. Ng4+ Kd2 7. Nh2 $1 (7. Ne5 $2 c3 8. Nc4+ Kd3 9. Na3 Ke4 $11) 7... c3 8. Nf1+ $1 Ke2 (8... Kd3 9. Kxa2 c2 10. Kb2 $18) 9. Kxa2 c2 10. Kb2 Kd1 11. Ne3+ $18) 6. Nh1 $3 ({2nd thematic try:} 6. Ne4 $2 Kf3 7. h5 Kxe4 8. h6 c3 9. Kxa2 {Position Y'} Kd3 $1 {Black has to avoid moving to the e3 square!} 10. h7 c2 11. h8=Q c1=Q $11) 6... c3 (6... Kf3 7. h5 c3 8. Kxa2 $18) 7. Ng3+ Kf3 8. Kxa2 $1 Kxg3 (8... Kg4 9. h5 $18) 9. h5 Kf4 $1 {Réti manoeuvre} 10. h6 {Position Y} Ke3 {Unlike in the 2nd thematic try, the black king had no access to d3, therefore it could not avoid moving to the mined square e3...} 11. h7 c2 12. h8=Q c1=Q 13. Qh6+ $1 {Boom!} 1-0