[Event "Troizky-150 MT"] [Site "?"] [Date "2017.??.??"] [Round "?"] [White "(2) Alexey Sochnev (RUS)"] [Black "?"] [Result "1/2-1/2"] [Annotator "Special Prize"] [SetUp "1"] [FEN "4K3/4P3/r7/P2P1n2/1P6/2k5/8/8 w - - 0 1"] [PlyCount "43"] [EventDate "2017.??.??"] 1. b5 Ra7 $1 (1... Ra8+ 2. Kd7 Ra7+ 3. Ke6 Nxe7 4. b6 Rxa5 5. b7 $1 $11) (1... Rxa5 2. Kf8 $1 Nd6 3. e8=Q Nxe8 4. Kxe8 Rxb5 5. d6 $11) 2. Kd8 $1 Nxe7 $1 (2... Rxe7 3. a6 Rh7 4. b6 $11) 3. b6 Rxa5 4. d6 $1 (4. Kxe7 $2 Rxd5 $19) 4... Nc6+ 5. Kc7 Rc5 6. d7 $1 ({Thematic try:} 6. b7 $2 Nb4+ 7. Kb6 Kc4 8. b8=N $1 Rc8 $1 $19 (8... Rb5+ $2 9. Kc7 Nd5+ 10. Kc8 Rc5+ 11. Kb7 Nf4 12. d7 Ne6 13. Nc6 Rd5 14. Kc8 Rd6 15. Nd8 $3 (15. d8=N $2 Nf8 $19) 15... Nc5 16. Nf7 $1 Rc6+ 17. Kd8 Kd5 18. Ke8 Re6+ 19. Kd8 Kd4 20. Kc8 {positional draw}) (8... Rh5 $2 9. d7 Nd5+ 10. Kb7 ({or} 10. Kc6 Rh6+ 11. Kb7) 10... Rh7 11. Kc6 Rh8 12. Na6 Rh6+ 13. Kb7 Rb6+ 14. Kc8 Ne7+ 15. Kc7 Nd5+ 16. Kc8 $11)) 6... Nd4+ (6... Na5+ 7. Kb8 Nc6+ 8. Kc7 $11) 7. Kd6 Kc4 8. d8=N $1 Rd5+ (8... Rc8 9. Kd7 Rb8 10. Kc7 Ra8 11. Kd7 $1 Rb8 12. Kc7 Ra8 13. Kd7 {positional draw. Unlike the thematic try, the rook has not enough room on the 8th rank.}) 9. Kc7 Nb5+ 10. Kc8 Nd6+ 11. Kc7 Ne8+ 12. Kc8 Rc5+ 13. Kd7 Nf6+ 14. Kd6 {A)} Rd5+ ({B)} 14... Ne4+ 15. Kd7 Rb5 $1 16. b7 Nc5+ 17. Kc8 $1 Na6 18. Nc6 Rc5 (18... Rb6 19. b8=N $1 $11 (19. Nb8 $2 Nc5 $19)) 19. Kd7 Rd5+ 20. Kc8 Rc5 (20... Rd6 21. b8=N $1 Nc5 22. Na5+ Kd5 23. Nb7 $1 $11) 21. Kd7 Rb5 22. Kc8 {positional draw}) 15. Kc7 Rd1 16. b7 Nd5+ 17. Kd7 $3 (17. Kc8 $2 Nb6+ 18. Kc7 Kb5 19. b8=N (19. b8=Q Rd7#) 19... Nd5+ $19) (17. Kc6 $2 Nb4+ 18. Kc7 Na6+ 19. Kb6 Nc5 20. Kc7 Kd5 21. b8=N Rh1 $19) 17... Nb4+ 18. Kc8 $1 Na6 19. Nc6 Rd6 20. b8=N $1 Nc5 21. Na5+ $1 Kd5 22. Nb7 $1 1/2-1/2