Theme: Endgame that culminating in matte     1.Nd6! 1.Ng7? Kxa8= 1.Rg8? Ra3 2.Rxf8 Rxh3+ 3.Kg2 f3+ 4.Bxf3 Rxf3 5.Ng7 Rxf8=   1...Bxd6! 2.Bc6!! Try : 2.Bd5? Bc7! (not 2...Qc7? 3.Rg7 Be7 4.Qe2 Qc1+ 5.Kh2 Nf1+ 6.Kg2 Ne3+ 7.fxe3 Qc2 8.Rxe7++-) 3.Qc8 Bb8 4.Qg4 Bc7 5.Qc8 Bb8 6.Rg7+ Qxg7 7.Qc6 b5 8.Qc5+ Rb6 9.Qa3+ Ra6= Positional Draw   2...Bc7 main 2...Nc2 3.Rg7+ Kb8 4.Rg8+ Qxg8 5.Qxg8+ Kc7 6.Qh7+ Kxc6 7.Qxc2+ Kd5 8.Qxd2+-; 2...Qc7 3.Rg7 Be7 4.Qe6+-   3.Qc8 Bb8 4.Rg8 Qb1+ 5.Rg1 Qh7 6.Qxa6+ Kxa6 7.Rxa1#