I'm pretty sure this isn't right

While doing a little record trawling in Chessbase (while listening to the commentators of the Singapore Grand Prix exclaiming "It's like a game of chess" in the background), I came across the following gem. My original intention was to find the game where all the pawns disappeared the quickest. In finding such a game, I came across something even better.
According to my database this was played in 1991, in the Lyngby Open (which is a real tournament in Denmark). When I initially discovered the game I was surprised that while the pawns had gone, most of the pieces remained. But by playing through a few more moves, the real intention of the players became clear. Given that such things don't happen by accident, I wonder what the arbiters opinion of this creation was?


Michna,Christian - Mach,Holger (2240) [A00]
Lyngby op Lyngby, 1991

1. h4 g5 2. hxg5 h6 3. gxh6 a5 4. b4 axb4 5. a3 bxa3 6. Bxa3 b5 7. c4 bxc4 8. Rh5 Ra6 9. Ra5 Raxh6 10. Ra8 Rh1 11. e4 d5 12. Bxc4 Nf6 13. exd5 e6 14. dxe6 Nh7 15. Nc3 Nc6 16. d4 Nxd4 17. Na2 Bb7 18. Ba6 Bxg2 19. exf7+ Kxf7 20. Kd2 Bh6+ 21. f4 Bxf4+ 22. Kc3 Kg6 23. Kb4 Nf3 24. Ne2 c6 25. Nd4 Qh4 26. Nxc6 Bh6+ 27. Ka5 Kh5 28. Na7 Bh3 29. Qa4 Nh2 1/2-1/2