Houdini 6 is one of the strongest engines currently on the market and comes with fritz 15 interface. I found that the engine is quite strong and fun to play against. It works also great at analyzing my games. This engine is not only strong but also quick at thinking during play as well during analysis.
The standard edition has been updated to reflect the stronger modern computers. You no longer need to purchase the multiprocessor version that has support for up to 128 cores. With the standard version it will support up to 4 cores or 8 with hyper treading. One of the problems I did have with it is that it would not save the engine settings after exit. Every time I restart Houdini 6 I have to change the engines settings again to 4 cores and 4 gigs of hash memory. The fritz 15 interface is alright, not much different that the fritz 12 that I can see.
Here I play a blitz game against Houdini 6 at full strength and get caught quickly at the beginning and lose a piece. The game is then analyzed by Houdini for 10 mins.
I least i also got to queen in the end though it didn’t matter. It was a full and well played game by Houdini. The analysis is also very thorough for just 10 mins of analysis.
In conclusion this is one of the strongest and up to date engine money can buy. Even the standard edition is not cheap and there are some strong free engines available as well. If you own a quad core computer and are looking for a paid solution for game analysis this could be for you. The gameplay and analysis is solid as you would expect from paid software. I would recommend that you to get it on sale if you really want it.