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  1. Subscriber LordofADown
    King of all Hills
    06 Dec '06 17:56
    Are opening books and databases considered legal for games?
  2. Standard member Dragon Fire
    Lord of all beasts
    06 Dec '06 17:57
    Originally posted by LordofADown
    Are opening books and databases considered legal for games?
    Yes but not Tablebases.
  3. 06 Dec '06 17:57
    yes, on here. but you cant use endgame databases
  4. Subscriber LordofADown
    King of all Hills
    06 Dec '06 17:57 / 1 edit
    thank you for the quick reply, but what exactly are tablebases?

    I didn't even know there were such things as endgame databases, thats rediculous!
  5. Standard member Dragon Fire
    Lord of all beasts
    06 Dec '06 18:02 / 1 edit
    Originally posted by LordofADown
    thank you for the quick reply, but what exactly are tablebases?

    I didn't even know there were such things as endgame databases, thats rediculous!
    Tablebases are "databases" that store all possible moves for a given number of pieces. Say if you have 5 pieces left on the board (no matter where they are) a tablebase will show you how to win.

    The most complex position to be solved by a tablebase so far is a theoretical mate in 500+ moves although obviously it would be a draw by the 50 move rule.
  6. Subscriber LordofADown
    King of all Hills
    06 Dec '06 18:06
    thanks for the response, could you explain this 50 move draw?
  7. Standard member Dragon Fire
    Lord of all beasts
    06 Dec '06 18:06
    Originally posted by LordofADown
    thanks for the response, could you explain this 50 move draw?
    If 50 moves are made without a pawn being moved or a piece being taken then either player may claim a draw.
  8. Subscriber LordofADown
    King of all Hills
    06 Dec '06 18:13
    oh ok, so it is possible that chess can be solved? that's a scary thought.
  9. Standard member Dragon Fire
    Lord of all beasts
    06 Dec '06 18:42 / 1 edit
    Originally posted by LordofADown
    oh ok, so it is possible that chess can be solved? that's a scary thought.
    Maybe but a Tablebase with 32 pieces would be enormous.

    For example there are over 300000 positions that can occur from the first 2 moves only and over 200 billion possible positions by move 4.