Houdini Aquarium 2017 & Houdini PRO Aquarium 2017
Houdini Aquarium 2017 is a new powerful analysis, database and chess publishing tool, powered by the world's strongest chess engine Houdini 5 and 7-piece Lomonosov Tablebases.

Houdini Aquarium 2017 — $59.95 / €47.96
Houdini PRO Aquarium 2017, up to 128 cores and 128 GB of hash — $99.95 / €79.96

Bazna 5th Kings Tournament 2011

The 5th Kings Tournament will be held in Medias, Romania, from June, 10th to June, 22.

Participants: Magnus Carlsen, Sergey Karjakin, Vassily Ivanchuk, Hikaru Nakamura, Teimour Radjabov and Liviu-Dieter Nisipeanu

Games start at 13:30 UTC. Final round starts at 11:30 UTC
ChessOK is going to broadcast all games of the tournament with Rybka Aquarium commentary.

Games: Round 1 [download PGN], Round 2 [download PGN], Round 3 [download PGN], Round 4 [download PGN], Round 5 [download PGN], Round 6 [download PGN], Round 7 [download PGN], Round 8 [download PGN], Round 9 [download PGN], Round 10 [download PGN]

24th Leon Masters 2011

The 24th Leon Masters tournament will be a match between Viswanathan Anand and Alexei Shirov. Two games will be held per day during June 3rd-5pth with a time control of 45 minutes + 30 seconds per move. If the match is tied 3-3, then there will be blitz and armageddon tie-breaks if required.

Anand - Shirov 4,5-1,5

ChessOK will broadcast the match live.

Games: Game 1 [download PGN], Game 2 [download PGN], Game 3 [download PGN], Game 4 [download PGN], Game 5 [download PGN], Game 6 [download PGN]

Summer Offer: 10 Training Programs with 20% Discount

From June, 1st until August 31st, order 10 training programs with a 20% discount! We have chosen the most useful programs for chess players at any level and offer them to you at the reduced price of $20/€16 for download versions and $25.6/€20.5 for CD versions.

  • TACTICS:
    • Elementary Chess Combinations
      The program includes more than 5000 exercises. After going through this course you will never miss an elementary combination in a practical game of your own.
    • CT-ART. Mating Combinations
      The course includes 700 exercises and 1200 instructive examples, each of them illustrates the peculiarities of using certain pieces for mating combinations.
    • Chess Combinations for Club Players
      This course includes more than 2000 exercises. It is an indispensable training tool for club players.
  • FOR CLUB PLAYERS:
    • Opening Lab
      This is the theoretical review of all the chess openings, which are illustrated by instructive games of the greatest chess players.
    • Attack on the King I and Attack on the King II
      You will have to use your fantasy and precise calculation in order to find a correct way of attacking the king.
    • Simple Defense
      The program develops the basic defensive skills such as withdrawing or protecting a piece, interception or attacking an opponent’s piece.
  • FOR BEGINNERS:
    • Dinosaur Chess
      Dinosaur Chess is an entertaining chess program that will keep the attention of children while teaching them the basics of chess.
    • Easy Ways of Taking Pawns and Pieces
      A great number of exercises makes this course an excellent tool for quick training of chess beginners.
    • Complete Chess Course
      This program includes 55 lessons that cover a wide range of basic knowledge of opening, middlegame and endgame.

Study chess online on Chess King Learn! Time-proven training courses, thousands of examples and exercises.

Start playing right now in your web browser on Chess King Playing Zone! Teams, tournaments, training, analysis and much more!

7-man Lomonosov Tablebases provide deeper-than-ever insight into chess endgame.

Download weekly chess database updates (containing 2000+ games) with latest tournaments and games in PGN and Chess Assistant format.

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