Fritz 11 has an ELO rating of 2914. For comparison, the highest ELO rating ever achieved by a human is only 2851 (Kasparov in 1999). This chess engine will trounce any human that has ever played the game. This is the main reason I got this chess engine - to analyze and follow games involving top-tier players, especially world championships. Although there are higher rated chess engines (Rybka, Houdini), their graphics are very poor, and Fritz 11 offers one of the best visual graphics among the various programs available today.
Fritz 12 and 13 have already arrived, but the improvements are minor and they are priced much higher (triple the cost or more). For the price of only $6.99, you can't beat this product!
There is a review complaining that the installation DVD is required every time one runs this program. Not true! Here is the procedure I used:
Insert DVD. Run "Setup". Install program.
Start Fritz11. You will be asked to insert DVD again and click "OK". Then enter the registration code.
After this, remove DVD - you will not need it again!