Manual de Houdini 3 2012 | Page 230

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Houdini Help

Number of games: You can specify how many games should be played.
Move limit: This limits the length of individual games. The number gives the
number of ply (half-moves) after leaving the openings book. In the database, the
games are stored without a result, but with an evaluation symbol.
Tip: If you want to check an openings book, set the move limit to “1”. The program
will go to the ends of different lines, calculate one move and save them with an
evaluation symbol.
Permanent brain: You can specify whether the engines should continue working
while the opponent is thinking. This, however, means that each engine will be using
50% of the processing power.
Openings DB: This is a special feature which allows you to select a database of
games. The engines load each game, jump to the end and play on from there. This
function allows you to stage “theme tournaments” and also conduct interesting
experiments, like the “Nunn match”, in which each side must play ten representative
openings positions with black and with white. These positions are included on your
program CD (Nunn.cbf) and were selected by Grandmaster John Nunn. They have
become the standard for testing chess engines without the influence of the openings
book.
First game: If you use an openings database, you can specify which position the
match should start from. and one with black. If both programs are using the same
openings book, or if you are using an openings database like the Nunn match, each
engine will play the same opening with white, and then with black.

Information during the match
While an engine match is running there is a lot of information available to keep you
briefed on its progress. These are to be found at the top of the screen.
On the top left you see the names of the two engines.

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