
White to play
100 years ago, Georg Marco failed to find the continuation 26. Re8+ Nxe8 27. Qxf7 Rxf7 28. Rxe8+ Kd7 29. Ra8 cxd4 30. Rxa7+ Ke8 31. Ra8+ Kd7 32. Kc2 when Black’s rooks and knight can’t move so White can just advance his king and queenside pawns.
I hope you managed to do better.
Well done if you did!