[Event "Sparkassen-Open A"] [Site "Heusenstamm, Martinsee"] [Date "2025.11.23"] [Round "7.25"] [White "Poysti, Nathanael"] [Black "Merz, Leander"] [Result "1/2-1/2"] [ECO "A00"] [WhiteElo "2207"] [BlackElo "2034"] [PlyCount "40"] [EventDate "2025.11.20"] [WhiteTeam "Buenos Aires"] [BlackTeam "Schachforum Darmstadt 1994"] 1. c4 Nf6 2. g3 g6 3. Bg2 d6 4. Nc3 Bg7 5. d3 O-O 6. e4 c5 7. Nge2 Nc6 8. O-O a6 9. h3 Rb8 10. a4 Nd7 11. Rb1 Qa5 12. Bd2 Nde5 13. Be1 Nb4 14. Nd5 Nec6 15. Bc3 b5 16. axb5 axb5 17. Ra1 Qd8 18. Nxb4 Nxb4 19. Bxg7 Kxg7 20. b3 bxc4 1/2-1/2