amazing Attack, Houdini crushes Fritz

Nov 2, 2016, 2:57 AM |
This was a rapid game between Houdini and Fritz played on my Computer, the timecontrol was
15m+5s for the first 25 moves
5m+10s for the next 15 moves and
1m for the rest
they were playing the Tarrasch Defense without an opening book or any kind of tablebase.
Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz 3300 MHz
W=19.6 plies; 10 423kN/s
B=21.5 plies; 9 568kN/s
How can something crush Fritz like that, or is the Tarrasch really so bad on that level?