Houdini Aquarium 2019 & ChessOK Aquarium 2023
ChessOK Aquarium 2023 is a new powerful analysis, database and chess publishing tool, powered by the world's strongest chess engines.

ChessOK Aquarium 2023 €39.96
Houdini 6 Aquarium 2019 €53.95

ChessOK.com » Daily Prize Tournaments
In the ChessOK playing zone, several tournaments with prizes are held daily. The whole list is here:

Daily Prize Tournaments (GMT everywhere)
— 10:00 Team cup: 3 minutes, 3 boards
— 12:00 Individual cup for 1-minute play
— 15:00 Individual cup for 3 minutes
— 17:00 Team cup for 3 minutes, on 5 boards.
— 19:00 Individual cup for 1 minute
— 22:00 Team&individual cup for 3 minutes. Teams are counted for three best players of the team.
— 00:00 Individual night cup for 3 minutes.

League tournament (the most popular tournament)
Takes place on Wednesdays, at 17.00 GMT, eight matches pro season, the timetable is accepted every time before the season.

15.00 GMT, Team cup for 1 minute at 5 boards.

14:00 Sunday tournament with the year membership as the main prize.

The last month’s Saturday
16.00: “ChessOK” Open Championship

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!

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

More »