How to Play A Game
To play a game you need a Graphical User Interface (GUI). Refer to your GUI’s Help document for instructions on how to install a chess engine and start a game.
How To Weaken Playing Strength
MadChess is difficult to defeat unless you’re a Grandmaster. For a more enjoyable game, you may wish to weaken the engine. In the Hiarcs Chess Explorer Pro and Shredder GUIs, set the playing strength of the engine in the new game dialog.
Hiarcs Chess Explorer Pro
Not all GUIs support the UCI_LimitStrength and UCI_Elo parameters, and therefore, do not provide a playing strength option in the new game dialog.
I have not done rigorous testing of MadChess at reduced strength to determine whether its Elo ratings are realistic. I welcome your feedback. See Elo Ratings for a list of typical chess players (of varying enthusiasm and ability) and their corresponding rating.
Refer to Engine Options for an explanation of all MadChess UCI options. Refer to your GUI’s Help document for instructions on how to modify and save engine options.
How Does MadChess Play Chess?
For a technical explanation of how MadChess searches and evaluates chess positions, see the Developer Guide.
How Does MadChess Play Chess As Poorly As Me?
For a technical explanation of how the strength of MadChess is reduced, see The MadChess UCI_LimitStrength Algorithm.