Rybka & Chess Openings 2006
From Convekta
With the unique game style, Rybka 2.1 is known as the strongest playing program in the world. Its rating surpasses 3000, 100-200 points higher than any other chess playing program! Many of the top players now use only Rybka 2.1 for work. For the short period of time Rybka has been out, it has achieved first position in the rating list of the strongest programs, owing to the brilliant combination of the unique chess concept and revolutionary technology at move selecting.
The main developer of the program - International master Vasik Rajlich has inserted algorithms of positional estimation into it which are as close to the chess-player's style of thinking as possible. Broad opportunities for play and analysis are provided: analyzing games and playing chess against computer, multi-variant and infinite analysis, etc.

(Rybka analyzing position)

(Opening stats)
This program is extremely strong and also an excellent tool for playing or reviewing games. Whether you are looking for where you went wrong in a game, trying to find the right move in a particular position, or just want a strong chess engine, this is a good choice.
The Chess Opening Encyclopedia 2006 includes rich theoretical material on all the openings, more than 8,000 annotations from GM Kalinin and 500,000 expert evaluations to key opening positions. The theoretical material presents in a familiar form of the encyclopedic table and allows you to replay the opening lines on the chessboard.
Test Opening Mode helps the chess players to check their knowledge of opening and also points out the inaccuracies and the mistakes and provides recommendations on their elimination. Program includes a convenient interface for playing at Internet Chess Club (ICC).
This part of the program allows you to look up practically any opening and get up to date information on it, as well as many relevant lines. Also included is a database with over 1 million games. It is searchable by almost any criteria imaginable: players, date, opening, etc.
With all these great features in one program it is definitely a great buy! I highly recommend this to any player seeking to improve!
System requirements: IBM-compatible PC, 128 MB RAM, Hard Disk (1 GB of free disk space), VGA graphics, Windows 2000/NT/XP, CD-ROM drive.
NSG rating = 10 of 10