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"Shane's Chess Information Database" is a huge chess toolkit with extensive database, analysis and chess-playing features.
Scid vs. PC is a usability and bug-fix fork of Scid. It has many interface fixes and improvements, and is fully compatible with Scid's .si4 databases. New features include a rewritten Gamelist, Computer Tournament, and FICS, Tree, Book and Graph improvements.
Bu chess An easy way to play and train chess on your PC
The program has 56 engines prepared to play from the start, and with very different levels, from 0 to 3500 elo.
This list of engines is not closed and you can add other ones with the only limitation that they use the UCI protocol.
This is a pc based digital chess clock. Key a-z is used for one player and 0-9 is used for another player for changing turns.
It supports saving the last state in case of power failure, count number of moves.
The code is not so wel organized.
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Ghronos is a gaming clock which provides configurable timing styles for chess, go, scrabble, and boggle. It can run on Palm OS or Pocket PC devices, the Windows desktop, or in a Java-enabled web browser.